From d898f4af5666868630381c276f6e6cb8d1238b80 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Tue, 25 Nov 2025 12:21:55 -0800
Subject: [PATCH 001/119] annotated List.java

---
 .../share/classes/java/util/List.java         | 85 ++++++++++---------
 1 file changed, 45 insertions(+), 40 deletions(-)

diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 600761fb6c69..88e006836ccc 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -33,6 +33,11 @@
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -174,7 +179,7 @@ public interface List<E> extends Collection<E> {
      * @return the number of elements in this list
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied List<E> this);
+    @NonNegative int size(@UnknownModifiability @GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains no elements.
@@ -183,7 +188,7 @@ public interface List<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied List<E> this);
+    boolean isEmpty(@UnknownModifiability @GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains the specified element.
@@ -202,7 +207,7 @@ public interface List<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied List<E> this, @UnknownSignedness Object o);
+    boolean contains(@UnknownModifiability @GuardSatisfied List<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this list in proper sequence.
@@ -210,7 +215,7 @@ public interface List<E> extends Collection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper
@@ -229,7 +234,7 @@ public interface List<E> extends Collection<E> {
      * @see Arrays#asList(Object[])
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(List<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability List<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this list in
@@ -271,7 +276,7 @@ public interface List<E> extends Collection<E> {
      * @throws NullPointerException if the specified array is null
      */
     @SideEffectFree
-    <T extends @UnknownSignedness Object> @Nullable T[] toArray(@PolyNull T[] a);
+    <T extends @UnknownSignedness Object> @Nullable T[] toArray(@UnknownModifiability List<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -301,7 +306,7 @@ public interface List<E> extends Collection<E> {
     @ReleasesNoLocks
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
-    boolean add(@GuardSatisfied List<E> this, E e);
+    boolean add(@Modifiable @GuardSatisfied List<E> this, E e);
 
     /**
      * Removes the first occurrence of the specified element from this list,
@@ -325,7 +330,7 @@ public interface List<E> extends Collection<E> {
      *         is not supported by this list
      */
     @SideEffectsOnly("this")
-    boolean remove(@GuardSatisfied @Shrinkable List<E> this, @UnknownSignedness Object o);
+    boolean remove(@Modifiable @GuardSatisfied @Shrinkable List<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Modification Operations
@@ -349,7 +354,7 @@ public interface List<E> extends Collection<E> {
      * @see #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@UnknownModifiability @GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Appends all of the elements in the specified collection to the end of
@@ -374,7 +379,7 @@ public interface List<E> extends Collection<E> {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@GuardSatisfied List<E> this, Collection<? extends E> c);
+    boolean addAll(@Modifiable @GuardSatisfied List<E> this, Collection<? extends E> c);
 
     /**
      * Inserts all of the elements in the specified collection into this
@@ -405,7 +410,7 @@ public interface List<E> extends Collection<E> {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
+    boolean addAll(@Modifiable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
 
     /**
      * Removes from this list all of its elements that are contained in the
@@ -425,7 +430,7 @@ public interface List<E> extends Collection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@GuardSatisfied @Shrinkable List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Modifiable @GuardSatisfied @Shrinkable List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Retains only the elements in this list that are contained in the
@@ -447,7 +452,7 @@ public interface List<E> extends Collection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean retainAll(@GuardSatisfied @Shrinkable List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Modifiable @GuardSatisfied @Shrinkable List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Replaces each element of this list with the result of applying the
@@ -478,7 +483,7 @@ public interface List<E> extends Collection<E> {
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default void replaceAll(UnaryOperator<E> operator) {
+    default void replaceAll(@Modifiable List<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final ListIterator<E> li = this.listIterator();
         while (li.hasNext()) {
@@ -546,7 +551,7 @@ default void replaceAll(UnaryOperator<E> operator) {
      * @since 1.8
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    default void sort(Comparator<? super E> c) {
+    default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
         Object[] a = this.toArray();
         Arrays.sort(a, (Comparator) c);
         ListIterator<E> i = this.listIterator();
@@ -563,7 +568,7 @@ default void sort(Comparator<? super E> c) {
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this list
      */
-    void clear(@GuardSatisfied @Shrinkable List<E> this);
+    void clear(@Modifiable @GuardSatisfied @Shrinkable List<E> this);
 
 
     // Comparison and hashing
@@ -583,7 +588,7 @@ default void sort(Comparator<? super E> c) {
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    boolean equals(@GuardSatisfied List<E> this, @Nullable Object o);
+    boolean equals(@UnknownModifiability @GuardSatisfied List<E> this, @Nullable Object o);
 
     /**
      * Returns the hash code value for this list.  The hash code of a list
@@ -603,7 +608,7 @@ default void sort(Comparator<? super E> c) {
      * @see #equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied List<E> this);
+    int hashCode(@UnknownModifiability @GuardSatisfied List<E> this);
 
 
     // Positional Access Operations
@@ -617,7 +622,7 @@ default void sort(Comparator<? super E> c) {
      *         ({@code index < 0 || index >= size()})
      */
     @Pure
-    E get(@GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
+    E get(@UnknownModifiability @GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
 
     /**
      * Replaces the element at the specified position in this list with the
@@ -637,7 +642,7 @@ default void sort(Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
-    E set(@GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
+    E set(@Modifiable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
 
     /**
      * Inserts the specified element at the specified position in this list
@@ -660,7 +665,7 @@ default void sort(Comparator<? super E> c) {
      */
     @ReleasesNoLocks
     @SideEffectsOnly("this")
-    void add(@GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
+    void add(@Modifiable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
 
     /**
      * Removes the element at the specified position in this list (optional
@@ -676,7 +681,7 @@ default void sort(Comparator<? super E> c) {
      *         ({@code index < 0 || index >= size()})
      */
     @ReleasesNoLocks
-    E remove(@GuardSatisfied @Shrinkable List<E> this, @IndexFor({"this"}) int index);
+    E remove(@Modifiable @GuardSatisfied @Shrinkable List<E> this, @IndexFor({"this"}) int index);
 
 
     // Search Operations
@@ -699,7 +704,7 @@ default void sort(Comparator<? super E> c) {
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int indexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int indexOf(@UnknownModifiability @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns the index of the last occurrence of the specified element
@@ -719,7 +724,7 @@ default void sort(Comparator<? super E> c) {
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int lastIndexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int lastIndexOf(@UnknownModifiability @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
 
     // List Iterators
@@ -731,7 +736,7 @@ default void sort(Comparator<? super E> c) {
      * @return a list iterator over the elements in this list (in proper
      *         sequence)
      */
-    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns a list iterator over the elements in this list (in proper
@@ -748,7 +753,7 @@ default void sort(Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
 
     // View
 
@@ -787,7 +792,7 @@ default void sort(Comparator<? super E> c) {
      *         fromIndex > toIndex})
      */
     @SideEffectFree
-    @PolyGrowShrink List<E> subList(@GuardSatisfied @PolyGrowShrink List<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex);
+    @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink List<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex);
 
     /**
      * Creates a {@link Spliterator} over the elements in this list.
@@ -843,7 +848,7 @@ default Spliterator<E> spliterator() {
      * @since 9
      */
     @SuppressWarnings("unchecked")
-    static <E> List<E> of() {
+    static <E> @Unmodifiable List<E> of() {
         return (List<E>) ImmutableCollections.EMPTY_LIST;
     }
 
@@ -859,7 +864,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1) {
         return new ImmutableCollections.List12<>(e1);
     }
 
@@ -876,7 +881,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2) {
         return new ImmutableCollections.List12<>(e1, e2);
     }
 
@@ -894,7 +899,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3);
     }
 
@@ -913,7 +918,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4);
     }
 
@@ -933,7 +938,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5);
     }
 
@@ -954,7 +959,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5,
                                                          e6);
     }
@@ -977,7 +982,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5,
                                                          e6, e7);
     }
@@ -1001,7 +1006,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5,
                                                          e6, e7, e8);
     }
@@ -1026,7 +1031,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5,
                                                          e6, e7, e8, e9);
     }
@@ -1052,7 +1057,7 @@ static <E> List<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9, E e10) {
+    static <E extends Object> @Unmodifiable @NonEmpty List<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9, E e10) {
         return ImmutableCollections.listFromTrustedArray(e1, e2, e3, e4, e5,
                                                          e6, e7, e8, e9, e10);
     }
@@ -1084,7 +1089,7 @@ static <E> List<E> of() {
      */
     @SafeVarargs
     @SuppressWarnings("varargs")
-    static <E extends Object> @PolyNonEmpty List<E> of(E @PolyNonEmpty... elements) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> of(E @PolyNonEmpty... elements) {
         switch (elements.length) { // implicit null check of elements
             case 0:
                 @SuppressWarnings("unchecked")
@@ -1115,7 +1120,7 @@ static <E> List<E> of() {
      * @throws NullPointerException if coll is null, or if it contains any nulls
      * @since 10
      */
-    static <E extends Object> @PolyNonEmpty List<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> copyOf(@UnknownModifiability @PolyNonEmpty Collection<? extends E> coll) {
         return ImmutableCollections.listCopy(coll);
     }
 }

From 10fef490a4bba1d6c7f0c5890568ddaae272f626 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 1 Dec 2025 00:22:31 -0800
Subject: [PATCH 002/119] annotated map.java, along with initialization of
 HashMap, ArrayList, LinkedHashMap

---
 .../share/classes/java/util/ArrayList.java    | 10 +-
 .../share/classes/java/util/HashMap.java      | 11 ++-
 .../classes/java/util/LinkedHashMap.java      | 11 ++-
 .../share/classes/java/util/List.java         |  2 +-
 .../share/classes/java/util/Map.java          | 92 ++++++++++---------
 5 files changed, 70 insertions(+), 56 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index fe87ea029a49..a2832c1c478a 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -30,6 +30,10 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -175,7 +179,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -190,7 +194,7 @@ public ArrayList(@NonNegative int initialCapacity) {
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public ArrayList() {
+    public @Modifiable ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -203,7 +207,7 @@ public ArrayList() {
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index b6fbd742f4b1..87b3ba533513 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -27,6 +27,9 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -456,7 +459,7 @@ static final int tableSizeFor(int cap) {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public HashMap(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable HashMap(@NonNegative int initialCapacity, float loadFactor) {
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal initial capacity: " +
                                                initialCapacity);
@@ -476,7 +479,7 @@ public HashMap(@NonNegative int initialCapacity, float loadFactor) {
      * @param  initialCapacity the initial capacity.
      * @throws IllegalArgumentException if the initial capacity is negative.
      */
-    public HashMap(@NonNegative int initialCapacity) {
+    public @Modifiable HashMap(@NonNegative int initialCapacity) {
         this(initialCapacity, DEFAULT_LOAD_FACTOR);
     }
 
@@ -484,7 +487,7 @@ public HashMap(@NonNegative int initialCapacity) {
      * Constructs an empty {@code HashMap} with the default initial capacity
      * (16) and the default load factor (0.75).
      */
-    public HashMap() {
+    public @Modifiable HashMap() {
         this.loadFactor = DEFAULT_LOAD_FACTOR; // all other fields defaulted
     }
 
@@ -497,7 +500,7 @@ public HashMap() {
      * @param   m the map whose mappings are to be placed in this map
      * @throws  NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty HashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty HashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         this.loadFactor = DEFAULT_LOAD_FACTOR;
         putMapEntries(m, false);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 4b66d66c45c6..7eb7860ed1e1 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -359,7 +360,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor);
         accessOrder = false;
     }
@@ -371,7 +372,7 @@ public LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
      * @param  initialCapacity the initial capacity
      * @throws IllegalArgumentException if the initial capacity is negative
      */
-    public LinkedHashMap(@NonNegative int initialCapacity) {
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity) {
         super(initialCapacity);
         accessOrder = false;
     }
@@ -380,7 +381,7 @@ public LinkedHashMap(@NonNegative int initialCapacity) {
      * Constructs an empty insertion-ordered {@code LinkedHashMap} instance
      * with the default initial capacity (16) and load factor (0.75).
      */
-    public LinkedHashMap() {
+    public @Modifiable LinkedHashMap() {
         super();
         accessOrder = false;
     }
@@ -394,7 +395,7 @@ public LinkedHashMap() {
      * @param  m the map whose mappings are to be placed in this map
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         super();
         accessOrder = false;
         putMapEntries(m, false);
@@ -411,7 +412,7 @@ public LinkedHashMap() {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public LinkedHashMap(@NonNegative int initialCapacity,
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity,
                          float loadFactor,
                          boolean accessOrder) {
         super(initialCapacity, loadFactor);
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 88e006836ccc..2648dacd1c61 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -167,7 +167,7 @@
  */
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
-@AnnotatedFor({"lock", "nullness", "index"})
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
 public interface List<E> extends Collection<E> {
     // Query Operations
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index a4accc42e817..827fc5609f3a 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -28,6 +28,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -192,7 +197,7 @@ public interface Map<K, V> {
      * @return the number of key-value mappings in this map
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Map<K, V> this);
+    @NonNegative int size(@UnknownModifiability @GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains no key-value mappings.
@@ -201,7 +206,7 @@ public interface Map<K, V> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Map<K, V> this);
+    boolean isEmpty(@UnknownModifiability @GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains a mapping for the specified
@@ -224,7 +229,7 @@ public interface Map<K, V> {
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
     @EnsuresNonEmptyIf(result=true, expression={"this"})
     @Pure
-    boolean containsKey(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
+    boolean containsKey(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
     /**
      * Returns {@code true} if this map maps one or more keys to the
@@ -246,7 +251,7 @@ public interface Map<K, V> {
      */
     @EnsuresNonEmptyIf(result=true, expression={"this"})
     @Pure
-    boolean containsValue(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
+    boolean containsValue(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
 
     /**
      * Returns the value to which the specified key is mapped,
@@ -275,7 +280,7 @@ public interface Map<K, V> {
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @Nullable V get(@GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
+    @Nullable V get(@UnknownModifiability @GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
 
     // Modification Operations
 
@@ -306,7 +311,7 @@ public interface Map<K, V> {
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @EnsuresNonEmpty("this")
-    @Nullable V put(@GuardSatisfied Map<K, V> this, K key, V value);
+    @Nullable V put(@Modifiable @GuardSatisfied Map<K, V> this, K key, V value);
 
     /**
      * Removes the mapping for a key from this map if it is present
@@ -339,7 +344,7 @@ public interface Map<K, V> {
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
     @CFComment("nullness: key is not @Nullable because this map might not permit null values")
-    @Nullable V remove(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
+    @Nullable V remove(@Modifiable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
 
     // Bulk Operations
@@ -363,7 +368,7 @@ public interface Map<K, V> {
      * @throws IllegalArgumentException if some property of a key or value in
      *         the specified map prevents it from being stored in this map
      */
-    void putAll(@GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
+    void putAll(@Modifiable @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
 
     /**
      * Removes all of the mappings from this map (optional operation).
@@ -372,7 +377,7 @@ public interface Map<K, V> {
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this map
      */
-    void clear(@GuardSatisfied Map<K, V> this);
+    void clear(@Modifiable @GuardSatisfied Map<K, V> this);
 
 
     // Views
@@ -393,7 +398,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyModifiable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -411,7 +416,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @PolyNonEmpty Collection<V> values(@GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyModifiable @PolyNonEmpty Collection<V> values(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -430,7 +435,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @PolyNonEmpty Set<Map.Entry<@KeyFor({"this"}) K, V>> entrySet(@GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyModifiable @PolyNonEmpty Set<Map.Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
@@ -475,7 +480,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        K getKey(Map.@GuardSatisfied Entry<K, V> this);
+        K getKey(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns the value corresponding to this entry.  If the mapping
@@ -488,7 +493,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        V getValue(Map.@GuardSatisfied Entry<K, V> this);
+        V getValue(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
 
         /**
          * Replaces the value corresponding to this entry with the specified
@@ -510,7 +515,7 @@ interface Entry<K, V> {
          *         required to, throw this exception if the entry has been
          *         removed from the backing map.
          */
-        V setValue(Map.@GuardSatisfied Entry<K, V> this, V value);
+        V setValue(Map.@Modifiable @GuardSatisfied Entry<K, V> this, V value);
 
         /**
          * Compares the specified object with this entry for equality.
@@ -531,7 +536,7 @@ interface Entry<K, V> {
          *         entry
          */
         @Pure
-        boolean equals(Map.@GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
+        boolean equals(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
 
         /**
          * Returns the hash code value for this map entry.  The hash code
@@ -550,7 +555,7 @@ interface Entry<K, V> {
          * @see #equals(Object)
          */
         @Pure
-        int hashCode(Map.@GuardSatisfied Entry<K, V> this);
+        int hashCode(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns a comparator that compares {@link Map.Entry} in natural order on key.
@@ -650,7 +655,8 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
          * @since 17
          */
         @SuppressWarnings("unchecked")
-        public static <K extends @NonNull Object, V extends @NonNull Object> Map.Entry<K, V> copyOf(Map.Entry<? extends K, ? extends V> e) {
+        public static <K extends @NonNull Object, V extends @NonNull Object> 
+        Map.@Unmodifiable Entry<K, V> copyOf(Map.@UnknownModifiability Entry<? extends K, ? extends V> e) {
             Objects.requireNonNull(e);
             if (e instanceof KeyValueHolder) {
                 return (Map.Entry<K, V>) e;
@@ -674,7 +680,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @param o object to be compared for equality with this map
      * @return {@code true} if the specified object is equal to this map
      */
-    boolean equals(@GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this map.  The hash code of a map is
@@ -689,7 +695,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @see Object#equals(Object)
      * @see #equals(Object)
      */
-    int hashCode(@GuardSatisfied Map<K, V> this);
+    int hashCode(@UnknownModifiability @GuardSatisfied Map<K, V> this);
 
     // Defaultable methods
 
@@ -803,7 +809,7 @@ default void forEach(@NonLeaked BiConsumer<? super K, ? super V> action) {
      * removed during iteration
      * @since 1.8
      */
-    default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    default void replaceAll(@Modifiable Map<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         for (Map.Entry<K, V> entry : entrySet()) {
             K k;
@@ -871,7 +877,7 @@ default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function)
      * @since 1.8
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    default @Nullable V putIfAbsent(K key, V value) {
+    default @Nullable V putIfAbsent(@Modifiable Map<K, V> this, K key, V value) {
         V v = get(key);
         if (v == null) {
             v = put(key, value);
@@ -915,7 +921,7 @@ default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function)
      * @since 1.8
      */
     @CFComment("nullness: key and value are not @Nullable because this map might not permit null values")
-    default boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+    default boolean remove(@Modifiable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         Object curValue = (key);
         if (!Objects.equals(curValue, value) ||
             (curValue == null && !containsKey(key))) {
@@ -967,7 +973,7 @@ default boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSati
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
-    default boolean replace(K key, V oldValue, V newValue) {
+    default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValue) {
         Object curValue = get(key);
         if (!Objects.equals(curValue, oldValue) ||
             (curValue == null && !containsKey(key))) {
@@ -1015,7 +1021,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
-    default @Nullable V replace(K key, V value) {
+    default @Nullable V replace(@Modifiable Map<K, V> this, K key, V value) {
         V curValue;
         if (((curValue = get(key)) != null) || containsKey(key)) {
             curValue = put(key, value);
@@ -1097,7 +1103,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      *         (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default @PolyNull V computeIfAbsent(K key,
+    default @PolyNull V computeIfAbsent(@Modifiable Map<K, V> this, K key,
             Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V v;
@@ -1174,7 +1180,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      *         (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default @Nullable V computeIfPresent(K key,
+    default @Nullable V computeIfPresent(@Modifiable Map<K, V> this, K key,
             BiFunction<? super K, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V oldValue;
@@ -1260,7 +1266,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      *         (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default @Nullable V compute(K key,
+    default @Nullable V compute(@Modifiable Map<K, V> this, K key,
             BiFunction<? super K, ? super @Nullable V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V oldValue = get(key);
@@ -1358,7 +1364,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      *         null
      * @since 1.8
      */
-    default @Nullable V merge(K key, @NonNull V value,
+    default @Nullable V merge(@Modifiable Map<K, V> this, K key, @NonNull V value,
             BiFunction<? super V, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Objects.requireNonNull(value);
@@ -1384,7 +1390,7 @@ default boolean replace(K key, V oldValue, V newValue) {
      * @since 9
      */
     @SuppressWarnings("unchecked")
-    static <K, V> Map<K, V> of() {
+    static <K, V> @Unmodifiable Map<K, V> of() {
         return (Map<K,V>) ImmutableCollections.EMPTY_MAP;
     }
 
@@ -1401,7 +1407,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1) {
         return new ImmutableCollections.Map1<>(k1, v1);
     }
 
@@ -1421,7 +1427,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2);
     }
 
@@ -1443,7 +1449,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3);
     }
 
@@ -1467,7 +1473,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4);
     }
 
@@ -1493,7 +1499,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5);
     }
 
@@ -1521,7 +1527,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
                                K k6, V v6) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5,
                                                k6, v6);
@@ -1553,7 +1559,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
                                K k6, V v6, K k7, V v7) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5,
                                                k6, v6, k7, v7);
@@ -1587,7 +1593,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
                                K k6, V v6, K k7, V v7, K k8, V v8) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5,
                                                k6, v6, k7, v7, k8, v8);
@@ -1623,7 +1629,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
                                K k6, V v6, K k7, V v7, K k8, V v8, K k9, V v9) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5,
                                                k6, v6, k7, v7, k8, v8, k9, v9);
@@ -1661,7 +1667,7 @@ static <K, V> Map<K, V> of() {
      *
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @NonEmpty Map<K, V> of(K k1, V v1, K k2, V v2, K k3, V v3, K k4, V v4, K k5, V v5,
                                K k6, V v6, K k7, V v7, K k8, V v8, K k9, V v9, K k10, V v10) {
         return new ImmutableCollections.MapN<>(k1, v1, k2, v2, k3, v3, k4, v4, k5, v5,
                                                k6, v6, k7, v7, k8, v8, k9, v9, k10, v10);
@@ -1700,7 +1706,7 @@ static <K, V> Map<K, V> of() {
      */
     @SafeVarargs
     @SuppressWarnings("varargs")
-    static <K extends @NonNull Object, V extends @NonNull Object> @PolyNonEmpty Map<K, V> ofEntries(Entry<? extends K, ? extends V> @PolyNonEmpty... entries) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> ofEntries(Entry<? extends K, ? extends V> @PolyNonEmpty... entries) {
         if (entries.length == 0) { // implicit null check of entries array
             @SuppressWarnings("unchecked")
             var map = (Map<K,V>) ImmutableCollections.EMPTY_MAP;
@@ -1756,7 +1762,7 @@ static <K, V> Map<K, V> of() {
      * @see Map#ofEntries Map.ofEntries()
      * @since 9
      */
-    static <K extends @NonNull Object, V extends @NonNull Object> Entry<K, V> entry(@NonNull K k, @NonNull V v) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable Entry<K, V> entry(@NonNull K k, @NonNull V v) {
         // KeyValueHolder checks for nulls
         return new KeyValueHolder<>(k, v);
     }
@@ -1779,7 +1785,7 @@ static <K, V> Map<K, V> of() {
      * @since 10
      */
     @SuppressWarnings({"rawtypes","unchecked"})
-    static <K extends @NonNull Object, V extends @NonNull Object> @PolyNonEmpty Map<K, V> copyOf(@PolyNonEmpty Map<? extends K, ? extends V> map) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@PolyNonEmpty Map<? extends K, ? extends V> map) {
         if (map instanceof ImmutableCollections.AbstractImmutableMap) {
             return (Map<K,V>)map;
         } else {

From aa363e9ac8d050f9e85e4840ee8aeb5efd2f49c0 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 1 Dec 2025 00:44:55 -0800
Subject: [PATCH 003/119] annotated collection.java

---
 .../share/classes/java/util/Collection.java   | 45 ++++++++++---------
 1 file changed, 25 insertions(+), 20 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 8ea7ca4d9efa..06844ffa6b56 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -29,6 +29,11 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -280,7 +285,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return the number of elements in this collection
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Collection<E> this);
+    @NonNegative int size(@UnknownModifiability @GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains no elements.
@@ -289,7 +294,7 @@ public interface Collection<E> extends Iterable<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Collection<E> this);
+    boolean isEmpty(@UnknownModifiability @GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains the specified element.
@@ -312,7 +317,7 @@ public interface Collection<E> extends Iterable<E> {
                 "(though I think a nicer specification would be to return false in that case)"})
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this collection.  There are no
@@ -323,7 +328,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return an {@code Iterator} over the elements in this collection
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Collection<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> this);
 
     /**
      * Returns an array containing all of the elements in this collection.
@@ -352,7 +357,7 @@ public interface Collection<E> extends Iterable<E> {
     "methods, because the most useful type for toArray is not expressible",
     "in the surface syntax that the nullness annotations support."})
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(Collection<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability Collection<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this collection;
@@ -406,7 +411,7 @@ public interface Collection<E> extends Iterable<E> {
      * @throws NullPointerException if the specified array is null
      */
     @SideEffectFree
-    <T extends @UnknownSignedness Object> @Nullable T [] toArray(@PolyNull T[] a);
+    <T extends @UnknownSignedness Object> @Nullable T [] toArray(@UnknownModifiability Collection<E> this, @PolyNull T[] a);
 
     /**
      * Returns an array containing all of the elements in this collection,
@@ -443,7 +448,7 @@ public interface Collection<E> extends Iterable<E> {
      * @throws NullPointerException if the generator function is null
      * @since 11
      */
-    default <T> T[] toArray(IntFunction<T[]> generator) {
+    default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[]> generator) {
         return toArray(generator.apply(0));
     }
 
@@ -483,7 +488,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      *         time due to insertion restrictions
      */
     @EnsuresNonEmpty("this")
-    boolean add(@GuardSatisfied Collection<E> this, E e);
+    boolean add(@Modifiable @GuardSatisfied Collection<E> this, E e);
 
     /**
      * Removes a single instance of the specified element from this
@@ -505,7 +510,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this collection
      */
-    boolean remove(@GuardSatisfied @Shrinkable Collection<E> this, @UnknownSignedness Object o);
+    boolean remove(@Modifiable @GuardSatisfied @Shrinkable Collection<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Operations
@@ -529,7 +534,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this collection
@@ -555,7 +560,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      *         this time due to insertion restrictions
      * @see #add(Object)
      */
-    boolean addAll(@GuardSatisfied Collection<E> this, Collection<? extends E> c);
+    boolean addAll(@Modifiable @GuardSatisfied Collection<E> this, Collection<? extends E> c);
 
     /**
      * Removes all of this collection's elements that are also contained in the
@@ -580,7 +585,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@GuardSatisfied @Shrinkable Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Modifiable @GuardSatisfied @Shrinkable Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements of this collection that satisfy the given
@@ -604,7 +609,7 @@ default <T> T[] toArray(IntFunction<T[]> generator) {
      *         supported.
      * @since 1.8
      */
-    default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> filter) {
+    default boolean removeIf(@Modifiable @Shrinkable Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
@@ -639,7 +644,7 @@ default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> fi
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean retainAll(@GuardSatisfied @Shrinkable Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Modifiable @GuardSatisfied @Shrinkable Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements from this collection (optional operation).
@@ -648,7 +653,7 @@ default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> fi
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this collection
      */
-    void clear(@GuardSatisfied @Shrinkable Collection<E> this);
+    void clear(@Modifiable @GuardSatisfied @Shrinkable Collection<E> this);
 
 
     // Comparison and hashing
@@ -687,7 +692,7 @@ default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> fi
      * @see List#equals(Object)
      */
     @Pure
-    boolean equals(@GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
+    boolean equals(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
 
     /**
      * Returns the hash code value for this collection.  While the
@@ -705,7 +710,7 @@ default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> fi
      * @see Object#equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied Collection<E> this);
+    int hashCode(@UnknownModifiability @GuardSatisfied Collection<E> this);
 
     /**
      * Creates a {@link Spliterator} over the elements in this collection.
@@ -759,7 +764,7 @@ default boolean removeIf(@Shrinkable Collection<E> this, Predicate<? super E> fi
      */
     @SideEffectFree
     @Override
-    default Spliterator<E> spliterator() {
+    default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
         return Spliterators.spliterator(this, 0);
     }
 
@@ -778,7 +783,7 @@ default Spliterator<E> spliterator() {
      * @return a sequential {@code Stream} over the elements in this collection
      * @since 1.8
      */
-    default @PolyNonEmpty Stream<E> stream(@PolyNonEmpty Collection<E> this) {
+    default @PolyNonEmpty Stream<E> stream(@UnknownModifiability @PolyNonEmpty Collection<E> this) {
         return StreamSupport.stream(spliterator(), false);
     }
 
@@ -799,7 +804,7 @@ default Spliterator<E> spliterator() {
      * collection
      * @since 1.8
      */
-    default Stream<E> parallelStream() {
+    default Stream<E> parallelStream(@UnknownModifiability Collection<E> this) {
         return StreamSupport.stream(spliterator(), true);
     }
 }

From 1a38624c6d6aff900926ec62c187325cb7832612 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 3 Dec 2025 22:58:24 -0800
Subject: [PATCH 004/119] annotated set.java for modifiability

---
 .../share/classes/java/util/HashSet.java      | 13 ++--
 .../share/classes/java/util/Map.java          |  4 +-
 .../share/classes/java/util/Set.java          | 63 ++++++++++---------
 3 files changed, 44 insertions(+), 36 deletions(-)

diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 44120107618b..54fbde657abb 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -28,6 +28,9 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -119,7 +122,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public HashSet() {
+    public @Modifiable HashSet() {
         map = new HashMap<>();
     }
 
@@ -132,7 +135,7 @@ public HashSet() {
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = new HashMap<>(Math.max((int) (c.size()/.75f) + 1, 16));
         addAll(c);
     }
@@ -146,7 +149,7 @@ public HashSet() {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -158,7 +161,7 @@ public HashSet(@NonNegative int initialCapacity, float loadFactor) {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -175,7 +178,7 @@ public HashSet(@NonNegative int initialCapacity) {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 827fc5609f3a..bee994e57cdf 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -435,7 +435,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @PolyModifiable @PolyNonEmpty Set<Map.Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyModifiable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
@@ -1785,7 +1785,7 @@ default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValu
      * @since 10
      */
     @SuppressWarnings({"rawtypes","unchecked"})
-    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@PolyNonEmpty Map<? extends K, ? extends V> map) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@UnknownModifiablity @PolyNonEmpty Map<? extends K, ? extends V> map) {
         if (map instanceof ImmutableCollections.AbstractImmutableMap) {
             return (Map<K,V>)map;
         } else {
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 0db338eaaeb0..4b1614ab27d2 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -28,6 +28,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -141,7 +146,7 @@ public interface Set<E> extends Collection<E> {
      * @return the number of elements in this set (its cardinality)
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Set<E> this);
+    @NonNegative int size(@UnknownModifiability @GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains no elements.
@@ -150,7 +155,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Set<E> this);
+    boolean isEmpty(@UnknownModifiability @GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains the specified element.
@@ -169,7 +174,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this set.  The elements are
@@ -179,7 +184,7 @@ public interface Set<E> extends Collection<E> {
      * @return an iterator over the elements in this set
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Set<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Set<E> this);
 
     /**
      * Returns an array containing all of the elements in this set.
@@ -198,7 +203,7 @@ public interface Set<E> extends Collection<E> {
      * @return an array containing all the elements in this set
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(Set<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability Set<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this set; the
@@ -243,7 +248,7 @@ public interface Set<E> extends Collection<E> {
      * @throws NullPointerException if the specified array is null
      */
     @SideEffectFree
-    <T> @Nullable T [] toArray(@PolyNull T[] a);
+    <T> @Nullable T [] toArray(@UnknownModifiability Set<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -279,7 +284,7 @@ public interface Set<E> extends Collection<E> {
      *         prevents it from being added to this set
      */
     @EnsuresNonEmpty("this")
-    boolean add(@GuardSatisfied Set<E> this, E e);
+    boolean add(@Modifiable @GuardSatisfied Set<E> this, E e);
 
 
     /**
@@ -303,7 +308,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this set
      */
-    boolean remove(@GuardSatisfied Set<E> this, @UnknownSignedness Object o);
+    boolean remove(@Modifiable @GuardSatisfied Set<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Operations
@@ -328,7 +333,7 @@ public interface Set<E> extends Collection<E> {
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this set if
@@ -353,7 +358,7 @@ public interface Set<E> extends Collection<E> {
      * @see #add(Object)
      */
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@GuardSatisfied Set<E> this, Collection<? extends E> c);
+    boolean addAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends E> c);
 
     /**
      * Retains only the elements in this set that are contained in the
@@ -376,7 +381,7 @@ public interface Set<E> extends Collection<E> {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    boolean retainAll(@GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes from this set all of its elements that are contained in the
@@ -399,7 +404,7 @@ public interface Set<E> extends Collection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements from this set (optional operation).
@@ -408,7 +413,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code clear} method
      *         is not supported by this set
      */
-    void clear(@GuardSatisfied Set<E> this);
+    void clear(@Modifiable @GuardSatisfied Set<E> this);
 
 
     // Comparison and hashing
@@ -426,7 +431,7 @@ public interface Set<E> extends Collection<E> {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    boolean equals(@GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this set.  The hash code of a set is
@@ -442,7 +447,7 @@ public interface Set<E> extends Collection<E> {
      * @see Set#equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied Set<E> this);
+    int hashCode(@UnknownModifiability @GuardSatisfied Set<E> this);
 
     /**
      * Creates a {@code Spliterator} over the elements in this set.
@@ -468,7 +473,7 @@ public interface Set<E> extends Collection<E> {
      * @since 1.8
      */
     @Override
-    default Spliterator<E> spliterator() {
+    default Spliterator<E> spliterator(@UnknownModifiability Set<E> this) {
         return Spliterators.spliterator(this, Spliterator.DISTINCT);
     }
 
@@ -482,7 +487,7 @@ default Spliterator<E> spliterator() {
      * @since 9
      */
     @SuppressWarnings("unchecked")
-    static <E> Set<E> of() {
+    static <E> @Unmodifiable Set<E> of() {
         return (Set<E>) ImmutableCollections.EMPTY_SET;
     }
 
@@ -497,7 +502,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1) {
         return new ImmutableCollections.Set12<>(e1);
     }
 
@@ -514,7 +519,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2) {
         return new ImmutableCollections.Set12<>(e1, e2);
     }
 
@@ -532,7 +537,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3) {
         return new ImmutableCollections.SetN<>(e1, e2, e3);
     }
 
@@ -551,7 +556,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4);
     }
 
@@ -571,7 +576,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5);
     }
 
@@ -592,7 +597,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5,
                                                e6);
     }
@@ -615,7 +620,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5,
                                                e6, e7);
     }
@@ -639,7 +644,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5,
                                                e6, e7, e8);
     }
@@ -664,7 +669,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5,
                                                e6, e7, e8, e9);
     }
@@ -690,7 +695,7 @@ static <E> Set<E> of() {
      *
      * @since 9
      */
-    static <E extends Object> @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9, E e10) {
+    static <E extends Object> @Unmodifiable @NonEmpty Set<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E e7, E e8, E e9, E e10) {
         return new ImmutableCollections.SetN<>(e1, e2, e3, e4, e5,
                                                e6, e7, e8, e9, e10);
     }
@@ -723,7 +728,7 @@ static <E> Set<E> of() {
      */
     @SafeVarargs
     @SuppressWarnings("varargs")
-    static <E extends Object> Set<E> of(E... elements) {
+    static <E extends Object> @Unmodifiable Set<E> of(E... elements) {
         switch (elements.length) { // implicit null check of elements
             case 0:
                 @SuppressWarnings("unchecked")
@@ -756,7 +761,7 @@ static <E extends Object> Set<E> of(E... elements) {
      * @since 10
      */
     @SuppressWarnings("unchecked")
-    static <E extends Object> @PolyNonEmpty Set<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty Set<E> copyOf(@UnknownModifiability @PolyNonEmpty Collection<? extends E> coll) {
         if (coll instanceof ImmutableCollections.AbstractImmutableSet) {
             return (Set<E>)coll;
         } else {

From 575780fef3d0027c833da03cf82803132321d78d Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 7 Dec 2025 02:36:12 -0800
Subject: [PATCH 005/119] finished annotations in Collections.java on
 modifiability

---
 .../share/classes/java/util/Collections.java  | 153 +++++++++---------
 .../share/classes/java/util/Enumeration.java  |   3 +-
 .../share/classes/java/util/Iterator.java     |   3 +-
 .../share/classes/java/util/LinkedList.java   |   5 +-
 .../share/classes/java/util/TreeMap.java      |   9 +-
 .../share/classes/java/util/TreeSet.java      |   9 +-
 6 files changed, 96 insertions(+), 86 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 67a03e21d3b8..cab2e317a64f 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -29,6 +29,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -166,7 +171,7 @@ private Collections() {
      * @see List#sort(Comparator)
      */
     @SuppressWarnings("unchecked")
-    public static <T extends Comparable<? super T>> void sort(List<T> list) {
+    public static <T extends Comparable<? super T>> void sort(@Modifiable List<T> list) {
         list.sort(null);
     }
 
@@ -200,7 +205,7 @@ public static <T extends Comparable<? super T>> void sort(List<T> list) {
      * @see List#sort(Comparator)
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    public static <T> void sort(List<T> list, @Nullable Comparator<? super T> c) {
+    public static <T> void sort(@Modifiable List<T> list, @Nullable Comparator<? super T> c) {
         list.sort(c);
     }
 
@@ -237,7 +242,7 @@ public static <T> void sort(List<T> list, @Nullable Comparator<? super T> c) {
      *         with the elements of the list.
      */
     public static <T>
-    int binarySearch(List<? extends Comparable<? super T>> list, T key) {
+    int binarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key) {
         if (list instanceof RandomAccess || list.size()<BINARYSEARCH_THRESHOLD)
             return Collections.indexedBinarySearch(list, key);
         else
@@ -245,7 +250,7 @@ int binarySearch(List<? extends Comparable<? super T>> list, T key) {
     }
 
     private static <T>
-    int indexedBinarySearch(List<? extends Comparable<? super T>> list, T key) {
+    int indexedBinarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key) {
         int low = 0;
         int high = list.size()-1;
 
@@ -265,7 +270,7 @@ else if (cmp > 0)
     }
 
     private static <T>
-    int iteratorBinarySearch(List<? extends Comparable<? super T>> list, T key)
+    int iteratorBinarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key)
     {
         int low = 0;
         int high = list.size()-1;
@@ -341,7 +346,7 @@ private static <T> T get(ListIterator<? extends T> i, int index) {
      *         elements of the list using this comparator.
      */
     @SuppressWarnings("unchecked")
-    public static <T> int binarySearch(List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
+    public static <T> int binarySearch(@UnknownModifiability List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
         if (c==null)
             return binarySearch((List<? extends Comparable<? super T>>) list, key);
 
@@ -351,7 +356,7 @@ public static <T> int binarySearch(List<? extends T> list, T key, @Nullable Comp
             return Collections.iteratorBinarySearch(list, key, c);
     }
 
-    private static <T> int indexedBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int indexedBinarySearch(@UnknownModifiability List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
 
@@ -370,7 +375,7 @@ else if (cmp > 0)
         return -(low + 1);  // key not found
     }
 
-    private static <T> int iteratorBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int iteratorBinarySearch(@UnknownModifiability List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
         ListIterator<? extends T> i = l.listIterator();
@@ -400,7 +405,7 @@ else if (cmp > 0)
      *         its list-iterator does not support the {@code set} operation.
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void reverse(@GuardSatisfied List<?> list) {
+    public static void reverse(@Modifiable @GuardSatisfied List<?> list) {
         int size = list.size();
         if (size < REVERSE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=0, mid=size>>1, j=size-1; i<mid; i++, j--)
@@ -447,7 +452,7 @@ public static void reverse(@GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or
      *         its list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@GuardSatisfied List<?> list) {
+    public static void shuffle(@Modifiable @GuardSatisfied List<?> list) {
         Random rnd = r;
         if (rnd == null)
             r = rnd = new Random(); // harmless race.
@@ -480,7 +485,7 @@ public static void shuffle(@GuardSatisfied List<?> list) {
      *         list-iterator does not support the {@code set} operation.
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void shuffle(@GuardSatisfied List<?> list, Random rnd) {
+    public static void shuffle(@Modifiable @GuardSatisfied List<?> list, Random rnd) {
         int size = list.size();
         if (size < SHUFFLE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=size; i>1; i--)
@@ -518,7 +523,7 @@ public static void shuffle(@GuardSatisfied List<?> list, Random rnd) {
      * @since 1.4
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void swap(@GuardSatisfied List<?> list, int i, int j) {
+    public static void swap(@Modifiable @GuardSatisfied List<?> list, int i, int j) {
         // instead of using a raw type here, it's possible to capture
         // the wildcard but it will require a call to a supplementary
         // private method
@@ -547,7 +552,7 @@ private static void swap(Object[] arr, int i, int j) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void fill(@GuardSatisfied List<? super T> list, T obj) {
+    public static <T> void fill(@Modifiable @GuardSatisfied List<? super T> list, T obj) {
         int size = list.size();
 
         if (size < FILL_THRESHOLD || list instanceof RandomAccess) {
@@ -580,7 +585,7 @@ public static <T> void fill(@GuardSatisfied List<? super T> list, T obj) {
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(List<? super T> dest, List<? extends T> src) {
+    public static <T> void copy(@Modifiable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -623,7 +628,7 @@ public static <T> void copy(List<? super T> dest, List<? extends T> src) {
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T min(Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T min(@UnknownModifiability Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -661,7 +666,7 @@ public static <T extends Object & Comparable<? super T>> T min(Collection<? exte
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T min(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T min(@UnknownModifiability Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)min((Collection) coll);
 
@@ -700,7 +705,7 @@ public static <T> T min(Collection<? extends T> coll, @Nullable Comparator<? sup
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T max(Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T max(@UnknownModifiability Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -738,7 +743,7 @@ public static <T extends Object & Comparable<? super T>> T max(Collection<? exte
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T max(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T max(@UnknownModifiability Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)max((Collection) coll);
 
@@ -808,7 +813,7 @@ public static <T> T max(Collection<? extends T> coll, @Nullable Comparator<? sup
      *         its list-iterator does not support the {@code set} operation.
      * @since 1.4
      */
-    public static void rotate(@GuardSatisfied List<?> list, int distance) {
+    public static void rotate(@Modifiable @GuardSatisfied List<?> list, int distance) {
         if (list instanceof RandomAccess || list.size() < ROTATE_THRESHOLD)
             rotate1(list, distance);
         else
@@ -872,7 +877,7 @@ private static void rotate2(List<?> list, int distance) {
      *         its list-iterator does not support the {@code set} operation.
      * @since  1.4
      */
-    public static <T> boolean replaceAll(List<T> list, @Nullable T oldVal, T newVal) {
+    public static <T> boolean replaceAll(@Modifiable List<T> list, @Nullable T oldVal, T newVal) {
         boolean result = false;
         int size = list.size();
         if (size < REPLACEALL_THRESHOLD || list instanceof RandomAccess) {
@@ -933,7 +938,7 @@ public static <T> boolean replaceAll(List<T> list, @Nullable T oldVal, T newVal)
      * @since  1.4
      */
     @Pure
-    public static @GTENegativeOne int indexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int indexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -987,7 +992,7 @@ public static <T> boolean replaceAll(List<T> list, @Nullable T oldVal, T newVal)
      * @since  1.4
      */
     @Pure
-    public static @GTENegativeOne int lastIndexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int lastIndexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -1051,7 +1056,7 @@ public static <T> boolean replaceAll(List<T> list, @Nullable T oldVal, T newVal)
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1178,7 +1183,7 @@ public Stream<E> parallelStream() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @PolyNonEmpty Set<T> unmodifiableSet(@PolyNonEmpty Set<? extends T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@UnknownModifiability @PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;
@@ -1216,7 +1221,7 @@ static class UnmodifiableSet<E> extends UnmodifiableCollection<E>
      *        returned.
      * @return an unmodifiable view of the specified sorted set.
      */
-    public static <T> @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@PolyNonEmpty SortedSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@UnknownModifiability @PolyNonEmpty SortedSet<T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSortedSet.class) {
             return s;
@@ -1271,7 +1276,7 @@ public SortedSet<E> tailSet(E fromElement) {
      * @return an unmodifiable view of the specified navigable set
      * @since 1.8
      */
-    public static <T> @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@PolyNonEmpty NavigableSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@UnknownModifiability @PolyNonEmpty NavigableSet<T> s) {
         if (s.getClass() == UnmodifiableNavigableSet.class) {
             return s;
         }
@@ -1367,7 +1372,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return an unmodifiable view of the specified list.
      */
     @SuppressWarnings("unchecked")
-    public static <T> @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
+    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
         if (list.getClass() == UnmodifiableList.class || list.getClass() == UnmodifiableRandomAccessList.class) {
            return (List<T>) list;
         }
@@ -1528,7 +1533,7 @@ private Object writeReplace() {
      * @return an unmodifiable view of the specified map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @PolyNonEmpty Map<K,V> unmodifiableMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty Map<K,V> unmodifiableMap(@UnknownModifiability @PolyNonEmpty Map<? extends K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableMap.class) {
             return (Map<K,V>) m;
@@ -1902,7 +1907,7 @@ && eq(e.getKey(),   t.getKey())
      * @return an unmodifiable view of the specified sorted map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@UnknownModifiability @PolyNonEmpty SortedMap<K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableSortedMap.class) {
             return (SortedMap<K,V>) m;
@@ -1957,7 +1962,7 @@ public SortedMap<K,V> tailMap(K fromKey)
      * @since 1.8
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@PolyNonEmpty NavigableMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@UnknownModifiability @PolyNonEmpty NavigableMap<K, ? extends V> m) {
         if (m.getClass() == UnmodifiableNavigableMap.class) {
             return (NavigableMap<K,V>) m;
         }
@@ -2129,11 +2134,11 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive)
      * @param  c the collection to be "wrapped" in a synchronized collection.
      * @return a synchronized view of the specified collection.
      */
-    public static <T> @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyNonEmpty Collection<T> c) {
+    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> c) {
         return new SynchronizedCollection<>(c);
     }
 
-    static <T> @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyNonEmpty Collection<T> c, Object mutex) {
+    static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> c, Object mutex) {
         return new SynchronizedCollection<>(c, mutex);
     }
 
@@ -2272,11 +2277,11 @@ private void writeObject(ObjectOutputStream s) throws IOException {
      * @param  s the set to be "wrapped" in a synchronized set.
      * @return a synchronized view of the specified set.
      */
-    public static <T> Set<T> synchronizedSet(Set<T> s) {
+    public static <T> @PolyModifiable Set<T> synchronizedSet(@PolyModifiable Set<T> s) {
         return new SynchronizedSet<>(s);
     }
 
-    static <T> Set<T> synchronizedSet(Set<T> s, Object mutex) {
+    static <T> @PolyModifiable Set<T> synchronizedSet(@PolyModifiable Set<T> s, Object mutex) {
         return new SynchronizedSet<>(s, mutex);
     }
 
@@ -2345,7 +2350,7 @@ public int hashCode() {
      * @param  s the sorted set to be "wrapped" in a synchronized sorted set.
      * @return a synchronized view of the specified sorted set.
      */
-    public static <T> SortedSet<T> synchronizedSortedSet(SortedSet<T> s) {
+    public static <T> @PolyModifiable SortedSet<T> synchronizedSortedSet(@PolyModifiable SortedSet<T> s) {
         return new SynchronizedSortedSet<>(s);
     }
 
@@ -2441,7 +2446,7 @@ public E last() {
      * @return a synchronized view of the specified navigable set
      * @since 1.8
      */
-    public static <T> NavigableSet<T> synchronizedNavigableSet(NavigableSet<T> s) {
+    public static <T> @PolyModifiable NavigableSet<T> synchronizedNavigableSet(@PolyModifiable NavigableSet<T> s) {
         return new SynchronizedNavigableSet<>(s);
     }
 
@@ -2545,13 +2550,13 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @param  list the list to be "wrapped" in a synchronized list.
      * @return a synchronized view of the specified list.
      */
-    public static <T> @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyNonEmpty List<T> list) {
+    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> list) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list) :
                 new SynchronizedList<>(list));
     }
 
-    static <T> @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyNonEmpty List<T> list, Object mutex) {
+    static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> list, Object mutex) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list, mutex) :
                 new SynchronizedList<>(list, mutex));
@@ -2722,7 +2727,7 @@ private Object writeReplace() {
      * @param  m the map to be "wrapped" in a synchronized map.
      * @return a synchronized view of the specified map.
      */
-    public static <K,V> Map<K,V> synchronizedMap(Map<K,V> m) {
+    public static <K,V> @PolyModifiable Map<K,V> synchronizedMap(@PolyModifiable Map<K,V> m) {
         return new SynchronizedMap<>(m);
     }
 
@@ -2929,7 +2934,7 @@ private void writeObject(ObjectOutputStream s) throws IOException {
      * @param  m the sorted map to be "wrapped" in a synchronized sorted map.
      * @return a synchronized view of the specified sorted map.
      */
-    public static <K,V> SortedMap<K,V> synchronizedSortedMap(SortedMap<K,V> m) {
+    public static <K,V> @PolyModifiable SortedMap<K,V> synchronizedSortedMap(@PolyModifiable SortedMap<K,V> m) {
         return new SynchronizedSortedMap<>(m);
     }
 
@@ -3034,7 +3039,7 @@ public K lastKey() {
      * @return a synchronized view of the specified navigable map.
      * @since 1.8
      */
-    public static <K,V> NavigableMap<K,V> synchronizedNavigableMap(NavigableMap<K,V> m) {
+    public static <K,V> @PolyModifiable NavigableMap<K,V> synchronizedNavigableMap(@PolyModifiable NavigableMap<K,V> m) {
         return new SynchronizedNavigableMap<>(m);
     }
 
@@ -3222,7 +3227,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      * @return a dynamically typesafe view of the specified collection
      * @since 1.5
      */
-    public static <E> @PolyGrowShrink @PolyNonEmpty Collection<E> checkedCollection(@PolyGrowShrink @PolyNonEmpty Collection<E> c,
+    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> checkedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> c,
                                                       Class<E> type) {
         return new CheckedCollection<>(c, type);
     }
@@ -3392,7 +3397,7 @@ public boolean removeIf(Predicate<? super E> filter) {
      * @return a dynamically typesafe view of the specified queue
      * @since 1.8
      */
-    public static <E> @PolyGrowShrink @PolyNonEmpty Queue<E> checkedQueue(@PolyGrowShrink @PolyNonEmpty Queue<E> queue, Class<E> type) {
+    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<E> checkedQueue(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<E> queue, Class<E> type) {
         return new CheckedQueue<>(queue, type);
     }
 
@@ -3452,7 +3457,7 @@ static class CheckedQueue<E>
      * @return a dynamically typesafe view of the specified set
      * @since 1.5
      */
-    public static <E> Set<E> checkedSet(Set<E> s, Class<E> type) {
+    public static <E> @PolyModifiable Set<E> checkedSet(@PolyModifiable Set<E> s, Class<E> type) {
         return new CheckedSet<>(s, type);
     }
 
@@ -3499,7 +3504,7 @@ static class CheckedSet<E> extends CheckedCollection<E>
      * @return a dynamically typesafe view of the specified sorted set
      * @since 1.5
      */
-    public static <E> SortedSet<E> checkedSortedSet(SortedSet<E> s,
+    public static <E> @PolyModifiable SortedSet<E> checkedSortedSet(@PolyModifiable SortedSet<E> s,
                                                     Class<E> type) {
         return new CheckedSortedSet<>(s, type);
     }
@@ -3564,7 +3569,7 @@ public SortedSet<E> tailSet(E fromElement) {
      * @return a dynamically typesafe view of the specified navigable set
      * @since 1.8
      */
-    public static <E> NavigableSet<E> checkedNavigableSet(NavigableSet<E> s,
+    public static <E> @PolyModifiable NavigableSet<E> checkedNavigableSet(@PolyModifiable NavigableSet<E> s,
                                                     Class<E> type) {
         return new CheckedNavigableSet<>(s, type);
     }
@@ -3647,7 +3652,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return a dynamically typesafe view of the specified list
      * @since 1.5
      */
-    public static <E> @PolyGrowShrink @PolyNonEmpty List<E> checkedList(@PolyGrowShrink @PolyNonEmpty List<E> list, Class<E> type) {
+    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> checkedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> list, Class<E> type) {
         return (list instanceof RandomAccess ?
                 new CheckedRandomAccessList<>(list, type) :
                 new CheckedList<>(list, type));
@@ -3799,7 +3804,7 @@ public List<E> subList(int fromIndex, int toIndex) {
      * @return a dynamically typesafe view of the specified map
      * @since 1.5
      */
-    public static <K, V> Map<K, V> checkedMap(Map<K, V> m,
+    public static <K, V> @PolyModifiable Map<K, V> checkedMap(@PolyModifiable Map<K, V> m,
                                               Class<K> keyType,
                                               Class<V> valueType) {
         return new CheckedMap<>(m, keyType, valueType);
@@ -4217,7 +4222,7 @@ public boolean equals(Object o) {
      * @return a dynamically typesafe view of the specified map
      * @since 1.5
      */
-    public static <K,V> SortedMap<K,V> checkedSortedMap(SortedMap<K, V> m,
+    public static <K,V> @PolyModifiable SortedMap<K,V> checkedSortedMap(@PolyModifiable SortedMap<K, V> m,
                                                         Class<K> keyType,
                                                         Class<V> valueType) {
         return new CheckedSortedMap<>(m, keyType, valueType);
@@ -4296,7 +4301,7 @@ public SortedMap<K,V> tailMap(K fromKey) {
      * @return a dynamically typesafe view of the specified map
      * @since 1.8
      */
-    public static <K,V> NavigableMap<K,V> checkedNavigableMap(NavigableMap<K, V> m,
+    public static <K,V> @PolyModifiable NavigableMap<K,V> checkedNavigableMap(@PolyModifiable NavigableMap<K, V> m,
                                                         Class<K> keyType,
                                                         Class<V> valueType) {
         return new CheckedNavigableMap<>(m, keyType, valueType);
@@ -4465,7 +4470,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> Iterator<T> emptyIterator() {
+    public static <T> @Unmodifiable Iterator<T> emptyIterator() {
         return (Iterator<T>) EmptyIterator.EMPTY_ITERATOR;
     }
 
@@ -4513,7 +4518,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> ListIterator<T> emptyListIterator() {
+    public static <T> @Unmodifiable ListIterator<T> emptyListIterator() {
         return (ListIterator<T>) EmptyListIterator.EMPTY_ITERATOR;
     }
 
@@ -4571,7 +4576,7 @@ private static class EmptyEnumeration<E> implements Enumeration<E> {
      * @see #emptySet()
      */
     @SuppressWarnings("rawtypes")
-    public static final Set EMPTY_SET = new EmptySet<>();
+    public static final @Unmodifiable Set EMPTY_SET = new EmptySet<>();
 
     /**
      * Returns an empty set (immutable).  This set is serializable.
@@ -4594,7 +4599,7 @@ private static class EmptyEnumeration<E> implements Enumeration<E> {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static final <T> Set<T> emptySet() {
+    public static final <T> @Unmodifiable Set<T> emptySet() {
         return (Set<T>) EMPTY_SET;
     }
 
@@ -4678,7 +4683,7 @@ public int hashCode() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <E> SortedSet<E> emptySortedSet() {
+    public static <E> @Unmodifiable SortedSet<E> emptySortedSet() {
         return (SortedSet<E>) UnmodifiableNavigableSet.EMPTY_NAVIGABLE_SET;
     }
 
@@ -4700,7 +4705,7 @@ public static <E> SortedSet<E> emptySortedSet() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <E> NavigableSet<E> emptyNavigableSet() {
+    public static <E> @Unmodifiable NavigableSet<E> emptyNavigableSet() {
         return (NavigableSet<E>) UnmodifiableNavigableSet.EMPTY_NAVIGABLE_SET;
     }
 
@@ -4710,7 +4715,7 @@ public static <E> NavigableSet<E> emptyNavigableSet() {
      * @see #emptyList()
      */
     @SuppressWarnings("rawtypes")
-    public static final List EMPTY_LIST = new EmptyList<>();
+    public static final @Unmodifiable List EMPTY_LIST = new EmptyList<>();
 
     /**
      * Returns an empty list (immutable).  This list is serializable.
@@ -4734,7 +4739,7 @@ public static <E> NavigableSet<E> emptyNavigableSet() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static final <T> List<T> emptyList() {
+    public static final <T> @Unmodifiable List<T> emptyList() {
         return (List<T>) EMPTY_LIST;
     }
 
@@ -4825,7 +4830,7 @@ private Object readResolve() {
      * @since 1.3
      */
     @SuppressWarnings("rawtypes")
-    public static final Map EMPTY_MAP = new EmptyMap<>();
+    public static final @Unmodifiable Map EMPTY_MAP = new EmptyMap<>();
 
     /**
      * Returns an empty map (immutable).  This map is serializable.
@@ -4847,7 +4852,7 @@ private Object readResolve() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static final <K,V> Map<K,V> emptyMap() {
+    public static final <K,V> @Unmodifiable Map<K,V> emptyMap() {
         return (Map<K,V>) EMPTY_MAP;
     }
 
@@ -4869,7 +4874,7 @@ public static final <K,V> Map<K,V> emptyMap() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static final <K,V> SortedMap<K,V> emptySortedMap() {
+    public static final <K,V> @Unmodifiable SortedMap<K,V> emptySortedMap() {
         return (SortedMap<K,V>) UnmodifiableNavigableMap.EMPTY_NAVIGABLE_MAP;
     }
 
@@ -4891,7 +4896,7 @@ public static final <K,V> SortedMap<K,V> emptySortedMap() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static final <K,V> NavigableMap<K,V> emptyNavigableMap() {
+    public static final <K,V> @Unmodifiable NavigableMap<K,V> emptyNavigableMap() {
         return (NavigableMap<K,V>) UnmodifiableNavigableMap.EMPTY_NAVIGABLE_MAP;
     }
 
@@ -5008,11 +5013,11 @@ private Object readResolve() {
      * @param o the sole object to be stored in the returned set.
      * @return an immutable set containing only the specified object.
      */
-    public static <T> Set<T> singleton(T o) {
+    public static <T> @Unmodifiable Set<T> singleton(T o) {
         return new SingletonSet<>(o);
     }
 
-    static <E> Iterator<E> singletonIterator(final E e) {
+    static <E> @Unmodifiable Iterator<E> singletonIterator(final E e) {
         return new Iterator<E>() {
             private boolean hasNext = true;
             @Pure
@@ -5048,7 +5053,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      * @param <T> Type of elements
      * @return A singleton {@code Spliterator}
      */
-    static <T> Spliterator<T> singletonSpliterator(final T element) {
+    static <T>  Spliterator<T> singletonSpliterator(final T element) {
         return new Spliterator<T>() {
             long est = 1;
 
@@ -5144,7 +5149,7 @@ public int hashCode() {
      * @return an immutable list containing only the specified object.
      * @since 1.3
      */
-    public static <T> @ArrayLen(1) List<T> singletonList(T o) {
+    public static <T> @Unmodifiable @ArrayLen(1) List<T> singletonList(T o) {
         return new SingletonList<>(o);
     }
 
@@ -5222,7 +5227,7 @@ public int hashCode() {
      *         mapping.
      * @since 1.3
      */
-    public static <K,V> Map<K,V> singletonMap(K key, V value) {
+    public static <K,V> @Unmodifiable Map<K,V> singletonMap(K key, V value) {
         return new SingletonMap<>(key, value);
     }
 
@@ -5368,7 +5373,7 @@ public int hashCode() {
      * @see    List#addAll(Collection)
      * @see    List#addAll(int, Collection)
      */
-    public static <T> List<T> nCopies(@NonNegative int n, T o) {
+    public static <T> @Unmodifiable List<T> nCopies(@NonNegative int n, T o) {
         if (n < 0)
             throw new IllegalArgumentException("List length = " + n);
         return new CopiesList<>(n, o);
@@ -5698,7 +5703,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
@@ -5727,7 +5732,7 @@ static boolean eq(Object o1, Object o2) {
      * @throws NullPointerException if {@code c} is null
      * @since 1.5
      */
-    public static @NonNegative int frequency(Collection<?> c, @Nullable Object o) {
+    public static @NonNegative int frequency(@UnknownModifiability Collection<?> c, @Nullable Object o) {
         int result = 0;
         if (o == null) {
             for (Object e : c)
@@ -5779,7 +5784,7 @@ static boolean eq(Object o1, Object o2) {
      * (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.5
      */
-    public static boolean disjoint(Collection<?> c1, Collection<?> c2) {
+    public static boolean disjoint(@UnknownModifiability Collection<?> c1, @UnknownModifiability Collection<?> c2) {
         // The collection to be used for contains(). Preference is given to
         // the collection who's contains() has lower O() complexity.
         Collection<?> contains = c2;
@@ -5858,7 +5863,7 @@ public static boolean disjoint(Collection<?> c1, Collection<?> c2) {
      * @since 1.5
      */
     @SafeVarargs
-    public static <T> boolean addAll(@GuardSatisfied Collection<? super T> c, T... elements) {
+    public static <T> boolean addAll(@Modifiable @GuardSatisfied Collection<? super T> c, T... elements) {
         boolean result = false;
         for (T element : elements)
             result |= c.add(element);
@@ -5897,7 +5902,7 @@ public static <T> boolean addAll(@GuardSatisfied Collection<? super T> c, T... e
      * @since 1.6
      */
     @SideEffectFree
-    public static <E> Set<E> newSetFromMap(Map<E, Boolean> map) {
+    public static <E> @PolyModifiable Set<E> newSetFromMap(@PolyModifiable Map<E, Boolean> map) {
         return new SetFromMap<>(map);
     }
 
@@ -5993,7 +5998,7 @@ private void readObject(java.io.ObjectInputStream stream)
      * @return the queue
      * @since  1.6
      */
-    public static <T> @PolyGrowShrink @PolyNonEmpty Queue<T> asLifoQueue(@PolyGrowShrink @PolyNonEmpty Deque<T> deque) {
+    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<T> asLifoQueue(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Deque<T> deque) {
         return new AsLIFOQueue<>(Objects.requireNonNull(deque));
     }
 
diff --git a/src/java.base/share/classes/java/util/Enumeration.java b/src/java.base/share/classes/java/util/Enumeration.java
index 27b026817077..480b650452cb 100644
--- a/src/java.base/share/classes/java/util/Enumeration.java
+++ b/src/java.base/share/classes/java/util/Enumeration.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -124,7 +125,7 @@ public interface Enumeration<E> {
      *
      * @since 9
      */
-    default Iterator<E> asIterator() {
+    default @Unmodifiable Iterator<E> asIterator() {
         return new Iterator<>() {
             @Pure
             @EnsuresNonEmptyIf(result = true, expression = "this")
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index fb353dbdc2ef..631c4032ed9c 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -116,7 +117,7 @@ public interface Iterator<E> {
      *         been called after the last call to the {@code next}
      *         method
      */
-    default void remove(@GuardSatisfied @Shrinkable Iterator<E> this) {
+    default void remove(@Modifiable @GuardSatisfied @Shrinkable Iterator<E> this) {
         throw new UnsupportedOperationException("remove");
     }
 
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 1cea55d756b7..7e5d2caa8859 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -129,7 +130,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public LinkedList() {
+    public @Modifiable LinkedList() {
     }
 
     /**
@@ -140,7 +141,7 @@ public LinkedList() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index b9cd216b7141..68d85776cf04 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -165,7 +166,7 @@ public class TreeMap<K,V>
      * {@code put(Object key, Object value)} call will throw a
      * {@code ClassCastException}.
      */
-    public TreeMap() {
+    public @Modifiable TreeMap() {
         comparator = null;
     }
 
@@ -183,7 +184,7 @@ public TreeMap() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public TreeMap(@Nullable Comparator<? super K> comparator) {
+    public @Modifiable TreeMap(@Nullable Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -201,7 +202,7 @@ public TreeMap(@Nullable Comparator<? super K> comparator) {
      *         or are not mutually comparable
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         comparator = null;
         putAll(m);
     }
@@ -215,7 +216,7 @@ public TreeMap(@Nullable Comparator<? super K> comparator) {
      *         and whose comparator is to be used to sort this map
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
         comparator = m.comparator();
         try {
             buildFromSorted(m.size(), m.entrySet().iterator(), null, null);
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index ce8e1c663d13..f0af706bc6eb 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -137,7 +138,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public TreeSet() {
+    public @Modifiable TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -154,7 +155,7 @@ public TreeSet() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -172,7 +173,7 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -184,7 +185,7 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }

From c0c3c7686f87d4f380c72d0699dde462a719c5fb Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sat, 3 Jan 2026 16:15:04 -0800
Subject: [PATCH 006/119] annotated itentityHashMap and LinkedHashSet as
 modifiable.

---
 .../share/classes/java/util/IdentityHashMap.java     |  5 +++--
 .../share/classes/java/util/LinkedHashSet.java       | 12 ++++++++----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 8239894e498f..3808770dc366 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -227,7 +228,7 @@ static final Object unmaskNull(Object key) {
      * Constructs a new, empty identity hash map with a default expected
      * maximum size (21).
      */
-    public IdentityHashMap() {
+    public @Modifiable IdentityHashMap() {
         init(DEFAULT_CAPACITY);
     }
 
@@ -240,7 +241,7 @@ public IdentityHashMap() {
      * @param expectedMaxSize the expected maximum size of the map
      * @throws IllegalArgumentException if {@code expectedMaxSize} is negative
      */
-    public IdentityHashMap(@NonNegative int expectedMaxSize) {
+    public @Modifiable IdentityHashMap(@NonNegative int expectedMaxSize) {
         if (expectedMaxSize < 0)
             throw new IllegalArgumentException("expectedMaxSize is negative: "
                                                + expectedMaxSize);
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 5886265bd039..a74614095a55 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -25,6 +25,10 @@
 
 package java.util;
 
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
 
@@ -136,7 +140,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -148,7 +152,7 @@ public LinkedHashSet(int initialCapacity, float loadFactor) {
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public LinkedHashSet(int initialCapacity) {
+    public @Modifiable LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -156,7 +160,7 @@ public LinkedHashSet(int initialCapacity) {
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public LinkedHashSet() {
+    public @Modifiable LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -170,7 +174,7 @@ public LinkedHashSet() {
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable LinkedHashSet(Collection<? extends E> c) {
         super(Math.max(2*c.size(), 11), .75f, true);
         addAll(c);
     }

From fa7c2f310a7ef94c7939a4dbe9d2b3e04fc45a26 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 18 Jan 2026 20:07:11 -0800
Subject: [PATCH 007/119] annotated modifiable classes

---
 src/java.base/share/classes/java/util/ArrayList.java  |  2 +-
 .../share/classes/java/util/Collections.java          |  4 ++--
 src/java.base/share/classes/java/util/HashMap.java    |  2 +-
 src/java.base/share/classes/java/util/HashSet.java    |  2 +-
 src/java.base/share/classes/java/util/Iterator.java   |  2 +-
 .../share/classes/java/util/LinkedHashMap.java        |  2 +-
 .../share/classes/java/util/LinkedHashSet.java        |  2 +-
 src/java.base/share/classes/java/util/LinkedList.java |  2 +-
 src/java.base/share/classes/java/util/TreeMap.java    |  2 +-
 src/java.base/share/classes/java/util/TreeSet.java    |  4 ++--
 src/java.base/share/classes/java/util/Vector.java     | 11 ++++++-----
 11 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 62e8c3c62ef3..42153d447e52 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -133,7 +133,7 @@
  */
 @CFComment("lock/nullness: Permit null elements")
 @AnnotatedFor({"lock", "nullness", "index"})
-public class ArrayList<E> extends AbstractList<E>
+public @Modifiable class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
     @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 2f203b056de3..ba4e7e8c89e3 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -482,7 +482,7 @@ public static void shuffle(@Modifiable @GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(List<?> list, Random rnd) {
+    public static void shuffle(@Modifiable List<?> list, Random rnd) {
         shuffle(list, (RandomGenerator) rnd);
     }
 
@@ -4693,7 +4693,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Unmodifiable Iterator<T> emptyIterator() {
+    public static <T> @Modifiable Iterator<T> emptyIterator() {
         return (Iterator<T>) EmptyIterator.EMPTY_ITERATOR;
     }
 
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 90cee63cec86..02cff3d42106 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -158,7 +158,7 @@
  * @since   1.2
  */
 @AnnotatedFor({"lock", "nullness", "index"})
-public class HashMap<K,V> extends AbstractMap<K,V>
+public @Modifiable class HashMap<K,V> extends AbstractMap<K,V>
     implements Map<K,V>, Cloneable, Serializable {
 
     @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 8732b6a35245..90f1c0ac9a4f 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -106,7 +106,7 @@
  */
 
 @AnnotatedFor({"lock", "nullness", "index"})
-public class HashSet<E>
+public @Modifiable class HashSet<E>
     extends AbstractSet<E>
     implements Set<E>, Cloneable, java.io.Serializable
 {
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index 631c4032ed9c..46115fdc8f10 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -69,7 +69,7 @@
 @CFComment({"nullness: This @Covariant annotation is sound, but it would not be sound on",
             "ListIterator (a subclass of Iterator), which supports a set operation."
 })
-@AnnotatedFor({"lock", "nullness"})
+@AnnotatedFor({"lock", "nullness", "modifiability"})
 @Covariant({0})
 public interface Iterator<E> {
     /**
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 76f0d81fb789..4029c71fe3f9 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -189,7 +189,7 @@
  * @since   1.4
  */
 @AnnotatedFor({"lock", "nullness", "index"})
-public class LinkedHashMap<K,V>
+public @Modifiable class LinkedHashMap<K,V>
     extends HashMap<K,V>
     implements SequencedMap<K,V>
 {
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 2e93a858159f..922ea62a85e2 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -128,7 +128,7 @@
 
 @CFComment({"lock/nullness: This class permits null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public class LinkedHashSet<E>
+public @Modifiable class LinkedHashSet<E>
     extends HashSet<E>
     implements SequencedSet<E>, Cloneable, java.io.Serializable {
 
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index da6f0408a805..177032c4fd41 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -110,7 +110,7 @@
 
 @CFComment({"lock/nullness: This class permits null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public class LinkedList<E>
+public @Modifiable class LinkedList<E>
     extends AbstractSequentialList<E>
     implements List<E>, Deque<E>, Cloneable, java.io.Serializable
 {
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 2e477c846c49..4064a2092613 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -140,7 +140,7 @@
 
 @CFComment({"lock/nullness: This permits null element when using a custom comparator that allows null"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public class TreeMap<K,V>
+public @Modifiable class TreeMap<K,V>
     extends AbstractMap<K,V>
     implements NavigableMap<K,V>, Cloneable, java.io.Serializable
 {
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index ad28363bbcac..6abb03f43d84 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -111,13 +111,13 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public class TreeSet<E> extends AbstractSet<E>
+public @Modifiable class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**
      * The backing map.
      */
-    private transient NavigableMap<E,Object> m;
+    private transient @Modifiable NavigableMap<E,Object> m;
 
     // Dummy value to associate with an Object in the backing Map
     private static final Object PRESENT = new Object();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 7c7ddcd48add..440834d94de4 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -110,7 +111,7 @@
  */
 @CFComment({"lock/nullness: permits nullable object"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public class Vector<E>
+public @Modifiable class Vector<E>
     extends AbstractList<E>
     implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
@@ -159,7 +160,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -176,7 +177,7 @@ public Vector(@NonNegative int initialCapacity, int capacityIncrement) {
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public Vector(@NonNegative int initialCapacity) {
+    public @Modifiable Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -185,7 +186,7 @@ public Vector(@NonNegative int initialCapacity) {
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public Vector() {
+    public @Modifiable Vector() {
         this(10);
     }
 
@@ -199,7 +200,7 @@ public Vector() {
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {

From 90ad64af95ef1627928ce8f0c778ba8f5512d25b Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 21 Jan 2026 18:36:47 -0800
Subject: [PATCH 008/119] annotated @WillThrowUOE

---
 src/java.base/share/classes/java/util/SortedMap.java | 3 +++
 src/java.base/share/classes/java/util/SortedSet.java | 3 +++
 src/java.base/share/classes/java/util/TreeMap.java   | 3 +++
 src/java.base/share/classes/java/util/TreeSet.java   | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 38dd78b2920c..9a9605bc6eba 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -313,6 +314,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
      default V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -328,6 +330,7 @@ default V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     default V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 31b1820d4b85..a23d7c68db88 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.Pure;
@@ -291,6 +292,7 @@ public Comparator<? super E> getComparator() {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     default void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -306,6 +308,7 @@ default void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     default void addLast(E e) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 4064a2092613..901afedb715f 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -342,6 +343,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -354,6 +356,7 @@ public V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 6abb03f43d84..4a8662e1fc35 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -507,6 +508,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -519,6 +521,7 @@ public void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public void addLast(E e) {
         throw new UnsupportedOperationException();
     }

From d2cd4e98a29b64eb49f0600dccb9aaef84f93a74 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 22 Jan 2026 00:04:01 -0800
Subject: [PATCH 009/119] finished annotation on sequenced collections

---
 .../classes/java/util/SequencedCollection.java      | 11 +++++++----
 .../share/classes/java/util/SequencedMap.java       | 10 ++++++----
 .../share/classes/java/util/SortedMap.java          | 10 ++++++----
 .../share/classes/java/util/SortedSet.java          | 13 +++++++------
 4 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 54237c7a3f77..0eae7eab4cc0 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -25,6 +25,9 @@
 
 package java.util;
 
+
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+
 /**
  * A collection that has a well-defined encounter order, that supports operations at both ends,
  * and that is reversible. The elements of a sequenced collection have an <a id="encounter">
@@ -103,7 +106,7 @@ public interface SequencedCollection<E> extends Collection<E> {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default void addFirst(E e) {
+    default void addFirst(@Modifiable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -121,7 +124,7 @@ default void addFirst(E e) {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default void addLast(E e) {
+    default void addLast(@Modifiable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -172,7 +175,7 @@ default E getLast() {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default E removeFirst() {
+    default E removeFirst(@Modifiable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
         it.remove();
@@ -194,7 +197,7 @@ default E removeFirst() {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default E removeLast() {
+    default E removeLast(@Modifiable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 6bff204b65dc..0711dffb79a6 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -27,6 +27,8 @@
 
 import jdk.internal.util.NullableKeyValueHolder;
 
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+
 /**
  * A Map that has a well-defined encounter order, that supports operations at both ends, and
  * that is reversible. The <a href="SequencedCollection.html#encounter">encounter order</a>
@@ -184,7 +186,7 @@ default Map.Entry<K,V> lastEntry() {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default Map.Entry<K,V> pollFirstEntry() {
+    default Map.Entry<K,V> pollFirstEntry(@Modifiable SequencedMap<K,V> this) {
         var it = entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
@@ -209,7 +211,7 @@ default Map.Entry<K,V> pollFirstEntry() {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default Map.Entry<K,V> pollLastEntry() {
+    default Map.Entry<K,V> pollLastEntry(@Modifiable SequencedMap<K,V> this) {
         var it = reversed().entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
@@ -235,7 +237,7 @@ default Map.Entry<K,V> pollLastEntry() {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putFirst(K k, V v) {
+    default V putFirst(@Modifiable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -254,7 +256,7 @@ default V putFirst(K k, V v) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putLast(K k, V v) {
+    default V putLast(@Modifiable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 9a9605bc6eba..cd527454d7fb 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,6 +26,8 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -165,7 +167,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         outside the bounds of the range
      */
     @SideEffectFree
-    SortedMap<K,V> subMap(@GuardSatisfied SortedMap<K, V> this, @GuardSatisfied K fromKey, @GuardSatisfied K toKey);
+    @PolyModifiable SortedMap<K,V> subMap(@PolyModifiable @GuardSatisfied SortedMap<K, V> this, @GuardSatisfied K fromKey, @GuardSatisfied K toKey);
 
     /**
      * Returns a view of the portion of this map whose keys are
@@ -193,7 +195,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         bounds of the range
      */
     @SideEffectFree
-    SortedMap<K,V> headMap(@GuardSatisfied SortedMap<K, V> this, K toKey);
+    @PolyModifiable SortedMap<K,V> headMap(@PolyModifiable @GuardSatisfied SortedMap<K, V> this, K toKey);
 
     /**
      * Returns a view of the portion of this map whose keys are
@@ -221,7 +223,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         bounds of the range
      */
     @SideEffectFree
-    SortedMap<K,V> tailMap(@GuardSatisfied SortedMap<K, V> this, K fromKey);
+    @PolyModifiable SortedMap<K,V> tailMap(@PolyModifiable @GuardSatisfied SortedMap<K, V> this, K fromKey);
 
     /**
      * Returns the first (lowest) key currently in this map.
@@ -345,7 +347,7 @@ default V putLast(K k, V v) {
      * @return a reverse-ordered view of this map, as a {@code SortedMap}
      * @since 21
      */
-    default SortedMap<K, V> reversed() {
+    default @PolyModifiable SortedMap<K, V> reversed(@PolyModifiable SortedMap<K, V> this) {
         return ReverseOrderSortedMapView.of(this);
     }
 }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index a23d7c68db88..375793aece47 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -161,7 +162,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      *         {@code toElement} lies outside the bounds of the range
      */
     @SideEffectFree
-    SortedSet<E> subSet(@GuardSatisfied SortedSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement);
+    @PolyModifiable SortedSet<E> subSet(@PolyModifiable @GuardSatisfied SortedSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement);
 
     /**
      * Returns a view of the portion of this set whose elements are
@@ -189,7 +190,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      *         bounds of the range
      */
     @SideEffectFree
-    SortedSet<E> headSet(@GuardSatisfied SortedSet<E> this, E toElement);
+    @PolyModifiable SortedSet<E> headSet(@PolyModifiable @GuardSatisfied SortedSet<E> this, E toElement);
 
     /**
      * Returns a view of the portion of this set whose elements are
@@ -217,7 +218,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      *         bounds of the range
      */
     @SideEffectFree
-    SortedSet<E> tailSet(@GuardSatisfied SortedSet<E> this, E fromElement);
+    @PolyModifiable SortedSet<E> tailSet(@PolyModifiable @GuardSatisfied SortedSet<E> this, E fromElement);
 
     /**
      * Returns the first (lowest) element currently in this set.
@@ -351,7 +352,7 @@ default E getLast() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst() {
+    default E removeFirst(@Modifiable SortedSet<E> this) {
         E e = this.first();
         this.remove(e);
         return e;
@@ -369,7 +370,7 @@ default E removeFirst() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast() {
+    default E removeLast(@Modifiable SortedSet<E> this) {
         E e = this.last();
         this.remove(e);
         return e;
@@ -385,7 +386,7 @@ default E removeLast() {
      * @return a reverse-ordered view of this collection, as a {@code SortedSet}
      * @since 21
      */
-    default SortedSet<E> reversed() {
+    default @PolyModifiable SortedSet<E> reversed(@PolyModifiable SortedSet<E> this) {
         return ReverseOrderSortedSetView.of(this);
     }
 }

From 39c448a842d582adbd206cca1e12d1c0a8a17b36 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 22 Jan 2026 00:20:07 -0800
Subject: [PATCH 010/119] finished navigablemap and navigableset

---
 .../share/classes/java/util/NavigableMap.java | 22 +++++++++-------
 .../share/classes/java/util/NavigableSet.java | 26 ++++++++++---------
 2 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 6fd455e0255d..0be4c50a797b 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,6 +36,8 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.lock.qual.Modifiable;
+import org.checkerframework.checker.lock.qual.PolyModifiable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -251,7 +253,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed first entry of this map,
      *         or {@code null} if this map is empty
      */
-    Map.@Nullable Entry<K,V> pollFirstEntry(@GuardSatisfied NavigableMap<K, V> this);
+    Map.@Nullable Entry<K,V> pollFirstEntry(@Modifiable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
      * Removes and returns a key-value mapping associated with
@@ -260,7 +262,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed last entry of this map,
      *         or {@code null} if this map is empty
      */
-    Map.@Nullable Entry<K,V> pollLastEntry(@GuardSatisfied NavigableMap<K, V> this);
+    Map.@Nullable Entry<K,V> pollLastEntry(@Modifiable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order view of the mappings contained in this map.
@@ -278,7 +280,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order view of this map
      */
     @SideEffectFree
-    NavigableMap<K,V> descendingMap();
+    @PolyModifiable NavigableMap<K,V> descendingMap(@PolyModifiable NavigableMap<K,V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -349,7 +351,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      *         outside the bounds of the range
      */
     @SideEffectFree
-    NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
+    @PolyModifiable NavigableMap<K,V> subMap(@PolyModifiable NavigableMap<K,V> this, K fromKey, boolean fromInclusive,
                              K toKey,   boolean toInclusive);
 
     /**
@@ -380,7 +382,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      *         bounds of the range
      */
     @SideEffectFree
-    NavigableMap<K,V> headMap(K toKey, boolean inclusive);
+    @PolyModifiable NavigableMap<K,V> headMap(@PolyModifiable NavigableMap<K,V> this, K toKey, boolean inclusive);
 
     /**
      * Returns a view of the portion of this map whose keys are greater than (or
@@ -410,7 +412,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      *         bounds of the range
      */
     @SideEffectFree
-    NavigableMap<K,V> tailMap(K fromKey, boolean inclusive);
+    @PolyModifiable NavigableMap<K,V> tailMap(@PolyModifiable NavigableMap<K,V> this, K fromKey, boolean inclusive);
 
     /**
      * {@inheritDoc}
@@ -422,7 +424,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedMap<K,V> subMap(K fromKey, K toKey);
+    @PolyModifiable SortedMap<K,V> subMap(@PolyModifiable NavigableMap<K,V> this, K fromKey, K toKey);
 
     /**
      * {@inheritDoc}
@@ -434,7 +436,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedMap<K,V> headMap(K toKey);
+    @PolyModifiable SortedMap<K,V> headMap(@PolyModifiable NavigableMap<K,V> this, K toKey);
 
     /**
      * {@inheritDoc}
@@ -446,7 +448,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedMap<K,V> tailMap(K fromKey);
+    @PolyModifiable SortedMap<K,V> tailMap(@PolyModifiable NavigableMap<K,V> this, K fromKey);
 
     /**
      * {@inheritDoc}
@@ -460,7 +462,7 @@ NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @return a reverse-ordered view of this map, as a {@code NavigableMap}
      * @since 21
      */
-    default NavigableMap<K, V> reversed() {
+    default @PolyModifiable NavigableMap<K, V> reversed(@PolyModifiable NavigableMap<K, V> this) {
         return this.descendingMap();
     }
 }
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 3bcdf1879201..705644210f64 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -37,6 +37,8 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -176,7 +178,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @return an iterator over the elements in this set, in ascending order
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty NavigableSet<E> this);
+    @PolyModifiable@PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> this);
 
     /**
      * Returns a reverse order view of the elements contained in this set.
@@ -193,7 +195,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return a reverse order view of this set
      */
-    NavigableSet<E> descendingSet();
+    @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable NavigableSet<E> this);
 
     /**
      * Returns an iterator over the elements in this set, in descending order.
@@ -201,7 +203,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return an iterator over the elements in this set, in descending order
      */
-    Iterator<E> descendingIterator();
+    @PolyModifiable Iterator<E> descendingIterator(@PolyModifiable NavigableSet<E> this);
 
     /**
      * Returns a view of the portion of this set whose elements range from
@@ -239,7 +241,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *         {@code toElement} lies outside the bounds of the range.
      */
     @SideEffectFree
-    NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
+    @PolyModifiable NavigableSet<E> subSet(@PolyModifiable NavigableSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
                            @GuardSatisfied E toElement,   boolean toInclusive);
 
     /**
@@ -270,7 +272,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      *         bounds of the range
      */
     @SideEffectFree
-    NavigableSet<E> headSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E toElement, boolean inclusive);
+    @PolyModifiable NavigableSet<E> headSet(@PolyModifiable NavigableSet<E> this, @GuardSatisfied E toElement, boolean inclusive);
 
     /**
      * Returns a view of the portion of this set whose elements are greater
@@ -300,7 +302,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      *         bounds of the range
      */
     @SideEffectFree
-    NavigableSet<E> tailSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E fromElement, boolean inclusive);
+    @PolyModifiable NavigableSet<E> tailSet(@PolyModifiable NavigableSet<E> this, @GuardSatisfied E fromElement, boolean inclusive);
 
     /**
      * {@inheritDoc}
@@ -312,7 +314,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement);
+    @PolyModifiable SortedSet<E> subSet(@PolyModifiable NavigableSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement);
 
     /**
      * {@inheritDoc}
@@ -324,7 +326,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedSet<E> headSet(@GuardSatisfied NavigableSet<E> this, E toElement);
+    @PolyModifiable SortedSet<E> headSet(@PolyModifiable NavigableSet<E> this, E toElement);
 
     /**
      * {@inheritDoc}
@@ -336,7 +338,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    SortedSet<E> tailSet(@GuardSatisfied NavigableSet<E> this, E fromElement);
+    @PolyModifiable SortedSet<E> tailSet(@PolyModifiable NavigableSet<E> this, E fromElement);
 
     /**
      * {@inheritDoc}
@@ -349,7 +351,7 @@ NavigableSet<E> subSet(@GuardSatisfied NavigableSet<E> this, @GuardSatisfied E f
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst() {
+    default E removeFirst(@Modifiable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
@@ -368,7 +370,7 @@ default E removeFirst() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast() {
+    default E removeLast(@Modifiable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
@@ -388,7 +390,7 @@ default E removeLast() {
      * @return a reverse-ordered view of this collection, as a {@code NavigableSet}
      * @since 21
      */
-    default NavigableSet<E> reversed() {
+    default @PolyModifiable NavigableSet<E> reversed(@PolyModifiable NavigableSet<E> this) {
         return this.descendingSet();
     }
 }

From c6c5e477593ca65b10af78f2081f0fb1f66ef941 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 22 Jan 2026 13:51:17 -0800
Subject: [PATCH 011/119] finished annotation on ConcurrentMap and
 ConcurrentNavigableMap

---
 .../java/util/concurrent/ConcurrentMap.java   | 24 ++++++++++---------
 .../concurrent/ConcurrentNavigableMap.java    | 21 ++++++++++------
 2 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 018492522c1a..5a31abfcd266 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -36,6 +36,8 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiable;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -93,7 +95,7 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @Pure
-    default V getOrDefault(Object key, V defaultValue) {
+    default V getOrDefault(@UnknownModifiable ConcurrentMap<K,V> this,Object key, V defaultValue) {
         V v;
         return ((v = get(key)) != null) ? v : defaultValue;
     }
@@ -117,7 +119,7 @@ default V getOrDefault(Object key, V defaultValue) {
      * @since 1.8
      */
     @Override
-    default void forEach(BiConsumer<? super K, ? super V> action) {
+    default void forEach(@UnknownModifiable ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K,V> entry : entrySet()) {
             K k;
@@ -165,7 +167,7 @@ default void forEach(BiConsumer<? super K, ? super V> action) {
      *         or value prevents it from being stored in this map
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    @Nullable V putIfAbsent(K key, V value);
+    @Nullable V putIfAbsent(@Modifiable ConcurrentMap<K,V> this, K key, V value);
 
     /**
      * Removes the entry for a key only if currently mapped to a given value.
@@ -196,7 +198,7 @@ default void forEach(BiConsumer<? super K, ? super V> action) {
      *         and this map does not permit null keys or values
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean remove(@UnknownSignedness Object key, @UnknownSignedness Object value);
+    boolean remove(@Modifiable ConcurrentMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value);
 
     /**
      * Replaces the entry for a key only if currently mapped to a given value.
@@ -228,7 +230,7 @@ default void forEach(BiConsumer<? super K, ? super V> action) {
      * @throws IllegalArgumentException if some property of a specified key
      *         or value prevents it from being stored in this map
      */
-    boolean replace(K key, V oldValue, V newValue);
+    boolean replace(@Modifiable ConcurrentMap<K,V> this, K key, V oldValue, V newValue);
 
     /**
      * Replaces the entry for a key only if currently mapped to some value.
@@ -260,7 +262,7 @@ default void forEach(BiConsumer<? super K, ? super V> action) {
      * @throws IllegalArgumentException if some property of the specified key
      *         or value prevents it from being stored in this map
      */
-    @Nullable V replace(K key, V value);
+    @Nullable V replace(@Modifiable ConcurrentMap<K,V> this, K key, V value);
 
     /**
      * {@inheritDoc}
@@ -293,7 +295,7 @@ default void forEach(BiConsumer<? super K, ? super V> action) {
      * @since 1.8
      */
     @Override
-    default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    default void replaceAll(@Modifiable ConcurrentMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         forEach((k,v) -> {
             while (!replace(k, v, function.apply(k, v))) {
@@ -333,7 +335,7 @@ default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function)
      * @since 1.8
      */
     @Override
-    default @PolyNull V computeIfAbsent(K key,
+    default @PolyNull V computeIfAbsent(@Modifiable ConcurrentMap<K,V> this, K key,
             Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V oldValue, newValue;
@@ -375,7 +377,7 @@ default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function)
      * @since 1.8
      */
     @Override
-    default @PolyNull V computeIfPresent(K key,
+    default @PolyNull V computeIfPresent(@Modifiable ConcurrentMap<K,V> this, K key,
             BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         for (V oldValue; (oldValue = get(key)) != null; ) {
@@ -423,7 +425,7 @@ default void replaceAll(BiFunction<? super K, ? super V, ? extends V> function)
      * @since 1.8
      */
     @Override
-    default @PolyNull V compute(K key,
+    default @PolyNull V compute(@Modifiable ConcurrentMap<K,V> this, K key,
                       BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         retry: for (;;) {
             V oldValue = get(key);
@@ -483,7 +485,7 @@ else if ((oldValue = putIfAbsent(key, newValue)) == null)
      * @since 1.8
      */
     @Override
-    default @PolyNull V merge(K key, @NonNull V value,
+    default @PolyNull V merge(@Modifiable ConcurrentMap<K,V> this, K key, @NonNull V value,
             BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Objects.requireNonNull(value);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index f201d63bcb85..fe8eb9969bd0 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -35,6 +35,7 @@
 
 package java.util.concurrent;
 
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
 import java.util.NavigableMap;
@@ -62,7 +63,8 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
+    @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
+                                       K fromKey, boolean fromInclusive,
                                        K toKey,   boolean toInclusive);
 
     /**
@@ -71,7 +73,8 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> headMap(K toKey, boolean inclusive);
+    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+                                        K toKey, boolean inclusive);
 
     /**
      * @throws ClassCastException       {@inheritDoc}
@@ -79,7 +82,8 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> tailMap(K fromKey, boolean inclusive);
+    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+                                        K fromKey, boolean inclusive);
 
     /**
      * @throws ClassCastException       {@inheritDoc}
@@ -87,7 +91,8 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> subMap(K fromKey, K toKey);
+    @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+                                       K fromKey, K toKey);
 
     /**
      * @throws ClassCastException       {@inheritDoc}
@@ -95,7 +100,8 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> headMap(K toKey);
+    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+                                        K toKey);
 
     /**
      * @throws ClassCastException       {@inheritDoc}
@@ -103,7 +109,8 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> tailMap(K fromKey);
+    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+                                        K fromKey);
 
     /**
      * Returns a reverse order view of the mappings contained in this map.
@@ -118,7 +125,7 @@ ConcurrentNavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
      * @return a reverse order view of this map
      */
     @SideEffectFree
-    ConcurrentNavigableMap<K,V> descendingMap();
+    @PolyModifiable ConcurrentNavigableMap<K,V> descendingMap(@PolyModifiable ConcurrentNavigableMap<K,V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.

From 93a16b447da249998d2fb2e404c5c87861ba6dfa Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 22 Jan 2026 14:02:30 -0800
Subject: [PATCH 012/119] added unmod annotations for sequenced collections

---
 src/java.base/share/classes/java/util/Collections.java | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index ba4e7e8c89e3..8be1aa8d3d53 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -1217,7 +1217,7 @@ public Stream<E> parallelStream() {
      * @since 21
      */
     @SuppressWarnings("unchecked")
-    public static <T> SequencedCollection<T> unmodifiableSequencedCollection(SequencedCollection<? extends T> c) {
+    public static <T> @Unmodifiable SequencedCollection<T> unmodifiableSequencedCollection(SequencedCollection<? extends T> c) {
         if (c.getClass() == UnmodifiableSequencedCollection.class) {
             return (SequencedCollection<T>) c;
         }
@@ -1328,7 +1328,7 @@ static class UnmodifiableSet<E> extends UnmodifiableCollection<E>
      * @since 21
      */
     @SuppressWarnings("unchecked")
-    public static <T> SequencedSet<T> unmodifiableSequencedSet(SequencedSet<? extends T> s) {
+    public static <T> @Unmodifiable SequencedSet<T> unmodifiableSequencedSet(SequencedSet<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSequencedSet.class) {
             return (SequencedSet<T>) s;
@@ -2062,7 +2062,7 @@ && eq(e.getKey(),   t.getKey())
      * @since 21
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> SequencedMap<K,V> unmodifiableSequencedMap(SequencedMap<? extends K, ? extends V> m) {
+    public static <K,V> @Unmodifiable SequencedMap<K,V> unmodifiableSequencedMap(SequencedMap<? extends K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableSequencedMap.class) {
             return (SequencedMap<K,V>) m;

From 1df9393155a171f3d07fa09bf78a65ab84dd9391 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 22 Jan 2026 14:52:35 -0800
Subject: [PATCH 013/119] fixed some annotations

---
 src/java.base/share/classes/java/util/Arrays.java       | 3 ++-
 src/java.base/share/classes/java/util/Hashtable.java    | 3 ++-
 src/java.base/share/classes/java/util/List.java         | 8 ++++----
 src/java.base/share/classes/java/util/NavigableMap.java | 4 ++--
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index e8c55ba81a54..f425b39811a2 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.index.qual.SearchIndexFor;
 import org.checkerframework.checker.interning.qual.PolyInterned;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.mustcall.qual.MustCallUnknown;
 import org.checkerframework.checker.mustcall.qual.PolyMustCall;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -4273,7 +4274,7 @@ private static boolean[] copyOfRangeBoolean(boolean[] original, int from, int to
     @SafeVarargs
     @SideEffectFree
     @SuppressWarnings("varargs")
-    public static <T> @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
+    public static <T> @Modifiable @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
         return new ArrayList<>(a);
     }
 
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index dac8d241449f..ea3062654645 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -152,7 +153,7 @@
  */
 @CFComment({"lock: This collection can only contain nonnull values"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public class Hashtable<K extends @NonNull Object,V extends @NonNull Object>
+public @Modifiable class Hashtable<K extends @NonNull Object,V extends @NonNull Object>
     extends Dictionary<K,V>
     implements Map<K,V>, Cloneable, java.io.Serializable {
 
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 5512b78cf524..e6ab42cfe94d 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -848,7 +848,7 @@ default Spliterator<E> spliterator() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default void addFirst(E e) {
+    default void addFirst(@Modifiable List<E> this, E e) {
         this.add(0, e);
     }
 
@@ -862,7 +862,7 @@ default void addFirst(E e) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default void addLast(E e) {
+    default void addLast(@Modifiable List<E> this, E e) {
         this.add(e);
     }
 
@@ -913,7 +913,7 @@ default E getLast() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst() {
+    default E removeFirst(@Modifiable List<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
@@ -932,7 +932,7 @@ default E removeFirst() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast() {
+    default E removeLast(@Modifiable List<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 0be4c50a797b..7835c8504be5 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,8 +36,8 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.lock.qual.Modifiable;
-import org.checkerframework.checker.lock.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.SideEffectFree;

From 266330c2be546f1e77825a9e79d3663db59759ca Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 25 Jan 2026 17:36:01 -0800
Subject: [PATCH 014/119] annotated the abstract interfaces.

---
 .../classes/java/util/AbstractCollection.java | 35 ++++++++++--------
 .../share/classes/java/util/AbstractList.java | 36 ++++++++++---------
 .../share/classes/java/util/AbstractMap.java  | 31 ++++++++--------
 .../java/util/AbstractSequentialList.java     | 17 +++++----
 .../share/classes/java/util/AbstractSet.java  |  8 +++--
 5 files changed, 72 insertions(+), 55 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 87cc5edd01de..f46c08867ece 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -29,6 +29,12 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -96,10 +102,9 @@ protected AbstractCollection() {
      * @return an iterator over the elements contained in this collection
      */
     @SideEffectFree
-    public abstract @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
-
+    public abstract @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
     @Pure
-    public abstract @NonNegative int size(@GuardSatisfied AbstractCollection<E> this);
+    public abstract @NonNegative int size(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this);
 
     /**
      * {@inheritDoc}
@@ -109,7 +114,7 @@ protected AbstractCollection() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@GuardSatisfied AbstractCollection<E> this) {
+    public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this) {
         return size() == 0;
     }
 
@@ -125,7 +130,7 @@ public boolean isEmpty(@GuardSatisfied AbstractCollection<E> this) {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean contains(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext())
@@ -163,7 +168,7 @@ public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisf
      * }</pre>
      */
     @SideEffectFree
-    public @PolyNull @PolySigned Object[] toArray(AbstractCollection<@PolyNull @PolySigned E> this) {
+    public @PolyNull @PolySigned Object[] toArray(@UnknownModifiability AbstractCollection<@PolyNull @PolySigned E> this) {
         // Estimate size of array; be prepared to see more or fewer elements
         Object[] r = new Object[size()];
         Iterator<E> it = iterator();
@@ -205,7 +210,7 @@ public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisf
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public <T> @Nullable T [] toArray(@PolyNull T [] a) {
+    public <T> @Nullable T [] toArray(@UnknownModifiability @PolyNull T [] a) {
         // Estimate size of array; be prepared to see more or fewer elements
         int size = size();
         T[] r = a.length >= size ? a :
@@ -275,7 +280,7 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IllegalStateException         {@inheritDoc}
      */
-    public boolean add(@GuardSatisfied AbstractCollection<E> this, E e) {
+    public boolean add(@Modifiable @GuardSatisfied AbstractCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -296,7 +301,7 @@ public boolean add(@GuardSatisfied AbstractCollection<E> this, E e) {
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
-    public boolean remove(@GuardSatisfied @Shrinkable AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Modifiable @GuardSatisfied @Shrinkable AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
@@ -333,7 +338,7 @@ public boolean remove(@GuardSatisfied @Shrinkable AbstractCollection<E> this, @G
      * @see #contains(Object)
      */
     @Pure
-    public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
+    public boolean containsAll(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
         for (Object e : c)
             if (!contains(e))
                 return false;
@@ -359,7 +364,7 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      *
      * @see #add(Object)
      */
-    public boolean addAll(@GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Modifiable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
         boolean modified = false;
         for (E e : c)
             if (add(e))
@@ -389,7 +394,7 @@ public boolean addAll(@GuardSatisfied AbstractCollection<E> this, Collection<? e
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean removeAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Modifiable @GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -424,7 +429,7 @@ public boolean removeAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this,
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean retainAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Modifiable @GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -453,7 +458,7 @@ public boolean retainAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this,
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
-    public void clear(@GuardSatisfied @Shrinkable AbstractCollection<E> this) {
+    public void clear(@Modifiable @GuardSatisfied @Shrinkable AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
@@ -475,7 +480,7 @@ public void clear(@GuardSatisfied @Shrinkable AbstractCollection<E> this) {
      * @return a string representation of this collection
      */
     @SideEffectFree
-    public String toString(@GuardSatisfied AbstractCollection<E> this) {
+    public String toString(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         if (! it.hasNext())
             return "[]";
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index cd389c4c4d90..7b5f2409dfcf 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -31,6 +31,10 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -131,7 +135,7 @@ protected AbstractList() {
      *         prevents it from being added to this list
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied AbstractList<E> this, E e) {
+    public boolean add(@Modifiable @GuardSatisfied AbstractList<E> this, E e) {
         add(size(), e);
         return true;
     }
@@ -142,7 +146,7 @@ public boolean add(@GuardSatisfied AbstractList<E> this, E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public abstract E get(@GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
+    public abstract E get(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
 
     /**
      * {@inheritDoc}
@@ -157,7 +161,7 @@ public boolean add(@GuardSatisfied AbstractList<E> this, E e) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E set(@GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
+    public E set(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -174,7 +178,7 @@ public E set(@GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public void add(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
+    public void add(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -188,7 +192,7 @@ public void add(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @Shrinkable AbstractList<E> this, @IndexFor({"this"}) int index) {
+    public E remove(@Modifiable @GuardSatisfied @Shrinkable AbstractList<E> this, @IndexFor({"this"}) int index) {
         throw new UnsupportedOperationException();
     }
 
@@ -207,7 +211,7 @@ public E remove(@GuardSatisfied @Shrinkable AbstractList<E> this, @IndexFor({"th
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
-    public @GTENegativeOne int indexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int indexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator();
         if (o==null) {
             while (it.hasNext())
@@ -234,7 +238,7 @@ public E remove(@GuardSatisfied @Shrinkable AbstractList<E> this, @IndexFor({"th
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
-    public @GTENegativeOne int lastIndexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int lastIndexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator(size());
         if (o==null) {
             while (it.hasPrevious())
@@ -266,7 +270,7 @@ public E remove(@GuardSatisfied @Shrinkable AbstractList<E> this, @IndexFor({"th
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this list
      */
-    public void clear(@GuardSatisfied @Shrinkable AbstractList<E> this) {
+    public void clear(@Modifiable @GuardSatisfied @Shrinkable AbstractList<E> this) {
         removeRange(0, size());
     }
 
@@ -290,7 +294,7 @@ public void clear(@GuardSatisfied @Shrinkable AbstractList<E> this) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public boolean addAll(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
+    public boolean addAll(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
         rangeCheckForAdd(index);
         boolean modified = false;
         for (E e : c) {
@@ -323,7 +327,7 @@ public boolean addAll(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return new Itr();
     }
 
@@ -335,7 +339,7 @@ public boolean addAll(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return listIterator(0);
     }
 
@@ -362,7 +366,7 @@ public boolean addAll(@GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
@@ -525,7 +529,7 @@ public void add(E e) {
      *         {@code (fromIndex > toIndex)}
      */
     @SideEffectFree
-    public @PolyGrowShrink List<E> subList(@GuardSatisfied @PolyGrowShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         subListRangeCheck(fromIndex, toIndex, size());
         return (this instanceof RandomAccess ?
                 new RandomAccessSubList<>(this, fromIndex, toIndex) :
@@ -567,7 +571,7 @@ static void subListRangeCheck(int fromIndex, int toIndex, int size) {
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
         if (!(o instanceof List))
@@ -595,7 +599,7 @@ public boolean equals(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nul
      * @return the hash code value for this list
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractList<E> this) {
+    public int hashCode(@UnknownModifiability @GuardSatisfied AbstractList<E> this) {
         int hashCode = 1;
         for (E e : this)
             hashCode = 31*hashCode + (e==null ? 0 : e.hashCode());
@@ -625,7 +629,7 @@ public int hashCode(@GuardSatisfied AbstractList<E> this) {
      * @param fromIndex index of first element to be removed
      * @param toIndex index after last element to be removed
      */
-    protected void removeRange(@GuardSatisfied @Shrinkable AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    protected void removeRange(@Modifiable @GuardSatisfied @Shrinkable AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 806a5146c43f..23b7dfd584f9 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -28,6 +28,9 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -105,7 +108,7 @@ protected AbstractMap() {
      * This implementation returns {@code entrySet().size()}.
      */
     @Pure
-    public @NonNegative int size(@GuardSatisfied AbstractMap<K, V> this) {
+    public @NonNegative int size(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
         return entrySet().size();
     }
 
@@ -117,7 +120,7 @@ protected AbstractMap() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@GuardSatisfied AbstractMap<K, V> this) {
+    public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
         return size() == 0;
     }
 
@@ -135,7 +138,7 @@ public boolean isEmpty(@GuardSatisfied AbstractMap<K, V> this) {
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
-    public boolean containsValue(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
+    public boolean containsValue(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (value==null) {
             while (i.hasNext()) {
@@ -169,7 +172,7 @@ public boolean containsValue(@GuardSatisfied AbstractMap<K, V> this, @GuardSatis
      */
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
     @Pure
-    public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Map.Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -202,7 +205,7 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      * @throws NullPointerException          {@inheritDoc}
      */
     @Pure
-    public @Nullable V get(@GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
+    public @Nullable V get(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -237,7 +240,7 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      */
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GuardSatisfied AbstractMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Modifiable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
         throw new UnsupportedOperationException();
     }
 
@@ -263,7 +266,7 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
-    public @Nullable V remove(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public @Nullable V remove(@Modifiable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         Entry<K,V> correctEntry = null;
         if (key==null) {
@@ -308,7 +311,7 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public void putAll(@GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Modifiable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
     }
@@ -325,7 +328,7 @@ public void putAll(@GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? ex
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
-    public void clear(@GuardSatisfied AbstractMap<K, V> this) {
+    public void clear(@Modifiable @GuardSatisfied AbstractMap<K, V> this) {
         entrySet().clear();
     }
 
@@ -522,7 +525,7 @@ public boolean contains(@UnknownSignedness Object v) {
      * @return {@code true} if the specified object is equal to this map
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -569,7 +572,7 @@ public boolean equals(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @N
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractMap<K, V> this) {
+    public int hashCode(@UnknownModifiability@GuardSatisfied AbstractMap<K, V> this) {
         int h = 0;
         for (Entry<K, V> entry : entrySet())
             h += entry.hashCode();
@@ -589,7 +592,7 @@ public int hashCode(@GuardSatisfied AbstractMap<K, V> this) {
      * @return a string representation of this map
      */
     @SideEffectFree
-    public String toString(@GuardSatisfied AbstractMap<K, V> this) {
+    public String toString(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (! i.hasNext())
             return "{}";
@@ -657,7 +660,7 @@ private static boolean eq(Object o1, Object o2) {
      *
      * @since 1.6
      */
-    public static class SimpleEntry<K,V>
+    public static @Modifiable class SimpleEntry<K,V>
         implements Entry<K,V>, java.io.Serializable
     {
         @java.io.Serial
@@ -808,7 +811,7 @@ public String toString(AbstractMap.@GuardSatisfied SimpleEntry<K, V> this) {
      * @param <V> the type of the value
      * @since 1.6
      */
-    public static class SimpleImmutableEntry<K,V>
+    public static @Unmodifiable class SimpleImmutableEntry<K,V>
         implements Entry<K,V>, java.io.Serializable
     {
         @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index dfa76cdf439a..7761739624d5 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -28,6 +28,9 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+Import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -97,7 +100,7 @@ protected AbstractSequentialList() {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public E get(@GuardSatisfied AbstractSequentialList<E> this, int index) {
+    public E get(@UnknownModifiability @GuardSatisfied AbstractSequentialList<E> this, int index) {
         try {
             return listIterator(index).next();
         } catch (NoSuchElementException exc) {
@@ -124,7 +127,7 @@ public E get(@GuardSatisfied AbstractSequentialList<E> this, int index) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E set(@GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public E set(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             ListIterator<E> e = listIterator(index);
             E oldVal = e.next();
@@ -155,7 +158,7 @@ public E set(@GuardSatisfied AbstractSequentialList<E> this, int index, E elemen
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public void add(@GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public void add(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             listIterator(index).add(element);
         } catch (NoSuchElementException exc) {
@@ -180,7 +183,7 @@ public void add(@GuardSatisfied AbstractSequentialList<E> this, int index, E ele
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @Shrinkable AbstractSequentialList<E> this, int index) {
+    public E remove(@Modifiable @GuardSatisfied @Shrinkable AbstractSequentialList<E> this, int index) {
         try {
             ListIterator<E> e = listIterator(index);
             E outCast = e.next();
@@ -223,7 +226,7 @@ public E remove(@GuardSatisfied @Shrinkable AbstractSequentialList<E> this, int
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public boolean addAll(@GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
+    public boolean addAll(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
         try {
             boolean modified = false;
             ListIterator<E> e1 = listIterator(index);
@@ -249,7 +252,7 @@ public boolean addAll(@GuardSatisfied AbstractSequentialList<E> this, int index,
      * @return an iterator over the elements in this list (in proper sequence)
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
         return listIterator();
     }
 
@@ -263,5 +266,5 @@ public boolean addAll(@GuardSatisfied AbstractSequentialList<E> this, int index,
      *         sequence)
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public abstract @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractSequentialList<E> this, int index);
+    public abstract @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink AbstractSequentialList<E> this, int index);
 }
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index a18723fbaca8..19e86415cd2d 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -26,6 +26,8 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.dataflow.qual.Pure;
@@ -92,7 +94,7 @@ protected AbstractSet() {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -126,7 +128,7 @@ public boolean equals(@GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Null
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractSet<E> this) {
+    public int hashCode(@UnknownModifiability @GuardSatisfied AbstractSet<E> this) {
         int h = 0;
         Iterator<E> i = iterator();
         while (i.hasNext()) {
@@ -174,7 +176,7 @@ public int hashCode(@GuardSatisfied AbstractSet<E> this) {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean removeAll(@GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Modifiable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
 

From bee62842b10fbdcade5756fd86e6c3b44576dee0 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 25 Jan 2026 17:36:54 -0800
Subject: [PATCH 015/119] fixed unknownmodifiability

---
 .../share/classes/java/util/concurrent/ConcurrentMap.java   | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 5a31abfcd266..32286c17da65 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -95,7 +95,7 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @Pure
-    default V getOrDefault(@UnknownModifiable ConcurrentMap<K,V> this,Object key, V defaultValue) {
+    default V getOrDefault(@UnknownModifiability ConcurrentMap<K,V> this,Object key, V defaultValue) {
         V v;
         return ((v = get(key)) != null) ? v : defaultValue;
     }
@@ -119,7 +119,7 @@ default V getOrDefault(@UnknownModifiable ConcurrentMap<K,V> this,Object key, V
      * @since 1.8
      */
     @Override
-    default void forEach(@UnknownModifiable ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
+    default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K,V> entry : entrySet()) {
             K k;

From 0ed3390e9d46972bf8bc6661f3c1edf8f5cd8c55 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 25 Jan 2026 18:23:09 -0800
Subject: [PATCH 016/119] finished basic annotations on queue

---
 .../share/classes/java/util/AbstractQueue.java  |  3 ++-
 .../share/classes/java/util/ArrayDeque.java     |  3 ++-
 .../share/classes/java/util/Deque.java          | 17 ++++++++++-------
 .../share/classes/java/util/PriorityQueue.java  |  3 ++-
 .../share/classes/java/util/Queue.java          |  3 ++-
 .../java/util/concurrent/BlockingDeque.java     |  3 ++-
 .../java/util/concurrent/BlockingQueue.java     |  3 ++-
 .../java/util/concurrent/TransferQueue.java     |  4 +++-
 8 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index 5c991c3b784f..da06b3d2abd6 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -68,7 +69,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"lock", "nullness"})
-public abstract class AbstractQueue<E>
+public @Modifiable abstract class AbstractQueue<E>
     extends AbstractCollection<E>
     implements Queue<E> {
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index f564841142ae..f1c254fd3486 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -105,7 +106,7 @@
  * @since   1.6
  */
 @AnnotatedFor({"lock", "nullness", "index"})
-public class ArrayDeque<E extends @NonNull Object> extends AbstractCollection<E>
+public @Modifiable class ArrayDeque<E extends @NonNull Object> extends AbstractCollection<E>
                            implements Deque<E>, Cloneable, Serializable
 {
     /*
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 6d5901def3bc..7987b18aee93 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -39,6 +39,9 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -218,7 +221,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+public @Modifiable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
@@ -237,7 +240,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addFirst(@GuardSatisfied Deque<E> this, E e);
+    void addFirst(@Modifiable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -259,7 +262,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addLast(@GuardSatisfied Deque<E> this, E e);
+    void addLast(@Modifiable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque unless it would
@@ -305,7 +308,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the head of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeFirst(@GuardSatisfied @NonEmpty @Shrinkable Deque<E> this);
+    E removeFirst(@Modifiable @GuardSatisfied @NonEmpty @Shrinkable Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque.  This method
@@ -315,7 +318,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the tail of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeLast(@GuardSatisfied @NonEmpty @Shrinkable Deque<E> this);
+    E removeLast(@Modifiable @GuardSatisfied @NonEmpty @Shrinkable Deque<E> this);
 
     /**
      * Retrieves and removes the first element of this deque,
@@ -323,7 +326,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollFirst(@GuardSatisfied @Shrinkable Deque<E> this);
+    @Nullable E pollFirst(@Modifiable @GuardSatisfied @Shrinkable Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque,
@@ -331,7 +334,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the tail of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollLast(@GuardSatisfied @Shrinkable Deque<E> this);
+    @Nullable E pollLast(@Modifiable @GuardSatisfied @Shrinkable Deque<E> this);
 
     /**
      * Retrieves, but does not remove, the first element of this deque.
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index f3b25d1c36e9..a90a469e4990 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -106,7 +107,7 @@
 @CFComment({"lock/nullness: This class doesn't permits null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
 @SuppressWarnings("unchecked")
-public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
+public @Modifiable class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
     implements java.io.Serializable {
 
     @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index 425d93f9add9..2d1289c58973 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -147,7 +148,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public interface Queue<E> extends Collection<E> {
+public @Modifiable interface Queue<E> extends Collection<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do so
      * immediately without violating capacity restrictions, returning
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
index e40f9c72e2f7..97c3983194a2 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -210,7 +211,7 @@
  * @param <E> the type of elements held in this deque
  */
 @AnnotatedFor({"nullness"})
-public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<E>, Deque<E> {
+public @Modifiable interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<E>, Deque<E> {
     /*
      * We have "diamond" multiple interface inheritance here, and that
      * introduces ambiguities.  Methods might end up with different
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
index 7ad116a16c34..11ff1c098fde 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -188,7 +189,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public interface BlockingQueue<E extends @NonNull Object> extends Queue<E> {
+public @Modifiable interface BlockingQueue<E extends @NonNull Object> extends Queue<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do
      * so immediately without violating capacity restrictions, returning
diff --git a/src/java.base/share/classes/java/util/concurrent/TransferQueue.java b/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
index 72a4108e61b8..847c1a0bb73d 100644
--- a/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
@@ -35,6 +35,8 @@
 
 package java.util.concurrent;
 
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+
 /**
  * A {@link BlockingQueue} in which producers may wait for consumers
  * to receive elements.  A {@code TransferQueue} may be useful for
@@ -65,7 +67,7 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-public interface TransferQueue<E> extends BlockingQueue<E> {
+public @Modifiable interface TransferQueue<E> extends BlockingQueue<E> {
     /**
      * Transfers the element to a waiting consumer immediately, if possible.
      *

From 03685d366a133c948da6322c0433d16fa36119f8 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 26 Jan 2026 14:41:22 -0800
Subject: [PATCH 017/119] finished annotating queue

---
 .../classes/java/util/concurrent/ArrayBlockingQueue.java   | 7 ++++---
 .../share/classes/java/util/concurrent/BlockingQueue.java  | 4 ++--
 .../java/util/concurrent/ConcurrentLinkedQueue.java        | 3 ++-
 .../share/classes/java/util/concurrent/DelayQueue.java     | 7 ++++---
 .../classes/java/util/concurrent/LinkedBlockingDeque.java  | 7 ++++---
 .../classes/java/util/concurrent/LinkedBlockingQueue.java  | 7 ++++---
 .../classes/java/util/concurrent/LinkedTransferQueue.java  | 3 ++-
 .../java/util/concurrent/PriorityBlockingQueue.java        | 7 ++++---
 .../classes/java/util/concurrent/SynchronousQueue.java     | 7 ++++---
 9 files changed, 30 insertions(+), 22 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index af4055aa8ad8..2287da2b6334 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -100,7 +101,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public class ArrayBlockingQueue<E extends Object> extends AbstractQueue<E>
+public @Modifiable class ArrayBlockingQueue<E extends Object> extends AbstractQueue<E>
         implements BlockingQueue<E>, java.io.Serializable {
 
     /*
@@ -717,7 +718,7 @@ private static void circularClear(Object[] items, int i, int end) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable ArrayBlockingQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable ArrayBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -727,7 +728,7 @@ public int drainTo(@GuardSatisfied @Shrinkable ArrayBlockingQueue<E> this, Colle
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable ArrayBlockingQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable ArrayBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
index 11ff1c098fde..9125b42cb3d1 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
@@ -362,7 +362,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @Shrinkable BlockingQueue<E> this, Collection<? super E> c);
+    int drainTo(@GuardSatisfied @Shrinkable BlockingQueue<E> this, @Modifiable Collection<? super E> c);
 
     /**
      * Removes at most the given number of available elements from
@@ -387,5 +387,5 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @Shrinkable BlockingQueue<E> this, Collection<? super E> c, int maxElements);
+    int drainTo(@GuardSatisfied @Shrinkable BlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 92876af30e22..3541ae7184b6 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -124,7 +125,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public class ConcurrentLinkedQueue<E extends @NonNull Object> extends AbstractQueue<E>
+public @Modifiable class ConcurrentLinkedQueue<E extends @NonNull Object> extends AbstractQueue<E>
         implements Queue<E>, java.io.Serializable {
     private static final long serialVersionUID = 196745693267521676L;
 
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index fb27e12d8bff..6849739260df 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -35,6 +35,7 @@
 
 package java.util.concurrent;
 
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -114,7 +115,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
+public @Modifiable class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     implements BlockingQueue<E> {
 
     private final transient ReentrantLock lock = new ReentrantLock();
@@ -386,7 +387,7 @@ public int size() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable DelayQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable DelayQueue<E> this, @Modifiable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -396,7 +397,7 @@ public int drainTo(@GuardSatisfied @Shrinkable DelayQueue<E> this, Collection<?
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable DelayQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable DelayQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 2c5ecfbb033b..b50e340c71bb 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -92,7 +93,7 @@
  * @param <E> the type of elements held in this deque
  */
 @AnnotatedFor({"nullness"})
-public class LinkedBlockingDeque<E extends Object>
+public @Modifiable class LinkedBlockingDeque<E extends Object>
     extends AbstractQueue<E>
     implements BlockingDeque<E>, java.io.Serializable {
 
@@ -743,7 +744,7 @@ public int remainingCapacity() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingDeque<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingDeque<E> this, @Modifiable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -753,7 +754,7 @@ public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingDeque<E> this, Coll
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingDeque<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingDeque<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index dc52c8b1cf8e..ff112766c1ca 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -94,7 +95,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public class LinkedBlockingQueue<E extends Object> extends AbstractQueue<E>
+public @Modifiable class LinkedBlockingQueue<E extends Object> extends AbstractQueue<E>
         implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -6903933977591709194L;
 
@@ -705,7 +706,7 @@ public void clear(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -715,7 +716,7 @@ public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this, Coll
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable LinkedBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 31d4ad306996..514c04a9b5b1 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -103,7 +104,7 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-public class LinkedTransferQueue<E> extends AbstractQueue<E>
+public @Modifiable class LinkedTransferQueue<E> extends AbstractQueue<E>
     implements TransferQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -3223113410248163686L;
 
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index bbc80761c7f0..1472cb005c46 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -129,7 +130,7 @@
  */
 @AnnotatedFor({"nullness"})
 @SuppressWarnings("unchecked")
-public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
+public @Modifiable class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
     implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = 5595510919245408276L;
 
@@ -727,7 +728,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable PriorityBlockingQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable PriorityBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -737,7 +738,7 @@ public int drainTo(@GuardSatisfied @Shrinkable PriorityBlockingQueue<E> this, Co
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable PriorityBlockingQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable PriorityBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index 577c5a9d7ba5..ccc82b877159 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -102,7 +103,7 @@
  * @param <E> the type of elements held in this queue
  */
 @AnnotatedFor({"nullness"})
-public class SynchronousQueue<E extends @NonNull Object> extends AbstractQueue<E>
+public @Modifiable class SynchronousQueue<E extends @NonNull Object> extends AbstractQueue<E>
     implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -3223113410248163686L;
 
@@ -1103,7 +1104,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable SynchronousQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable SynchronousQueue<E> this, @Modifiable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1119,7 +1120,7 @@ public int drainTo(@GuardSatisfied @Shrinkable SynchronousQueue<E> this, Collect
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @Shrinkable SynchronousQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable SynchronousQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();

From eb00a46ae50bef7f1f241e5370fb758f376a3c64 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 29 Jan 2026 17:07:39 -0800
Subject: [PATCH 018/119] annotated IdentityHashMap, WeakHashMap, and
 ConcurrentHashMap

---
 .../classes/java/util/IdentityHashMap.java    |  4 +--
 .../share/classes/java/util/WeakHashMap.java  |  3 ++-
 .../util/concurrent/ConcurrentHashMap.java    | 26 ++++++++++---------
 3 files changed, 18 insertions(+), 15 deletions(-)

diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 4d75e1569f06..b249b8f1be58 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -166,7 +166,7 @@
 
 @CFComment({"lock/nullness: This collection can only contain null values"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public class IdentityHashMap<K,V>
+public @Modifiable class IdentityHashMap<K,V>
     extends AbstractMap<K,V>
     implements Map<K,V>, java.io.Serializable, Cloneable
 {
@@ -1255,7 +1255,7 @@ public Spliterator<V> spliterator() {
 
     private class EntrySet extends AbstractSet<Map.Entry<K,V>> {
         @SideEffectFree
-        public Iterator<Map.Entry<K,V>> iterator() {
+        public Iterator<Map.@Modifiable Entry<K,V>> iterator() {
             return new EntryIterator();
         }
         @Pure
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 0bf358ec1f60..caf82fb03918 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -151,7 +152,7 @@
  */
 @CFComment({"lock: permits null keys and values"})
 @AnnotatedFor({"lock", "index", "nullness"})
-public class WeakHashMap<K,V>
+public @Modifiable class WeakHashMap<K,V>
     extends AbstractMap<K,V>
     implements Map<K,V> {
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index f5bfb81b94a0..e5c0c0efc050 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -36,6 +36,8 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -280,7 +282,7 @@
  * @param <V> the type of mapped values
  */
 @AnnotatedFor({"nullness"})
-public class ConcurrentHashMap<K extends @NonNull Object,V extends @NonNull Object> extends AbstractMap<K,V>
+public @Modifiable class ConcurrentHashMap<K extends @NonNull Object,V extends @NonNull Object> extends AbstractMap<K,V>
     implements ConcurrentMap<K,V>, Serializable {
     private static final long serialVersionUID = 7249069246763182397L;
 
@@ -1310,7 +1312,7 @@ public Collection<V> values() {
      * @return the set view
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet() {
+    public Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet() {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
@@ -3549,7 +3551,7 @@ public final Map.Entry<K,V> next(@NonEmpty EntryIterator<K,V> this) {
     /**
      * Exported Entry for EntryIterator.
      */
-    static final class MapEntry<K,V> implements Map.Entry<K,V> {
+    static final @Modifiable class MapEntry<K,V> implements Map.Entry<K,V> {
         final K key; // non-null
         V val;       // non-null
         final ConcurrentHashMap<K,V> map;
@@ -4275,7 +4277,7 @@ public int reduceValuesToInt(long parallelismThreshold,
      * @since 1.8
      */
     public void forEachEntry(long parallelismThreshold,
-                             Consumer<? super Map.Entry<K,V>> action) {
+                             Consumer<? super Map.@Unmodifiable Entry<K,V>> action) {
         if (action == null) throw new NullPointerException();
         new ForEachEntryTask<K,V>(null, batchFor(parallelismThreshold), 0, 0, table,
                                   action).invoke();
@@ -4295,7 +4297,7 @@ public void forEachEntry(long parallelismThreshold,
      * @since 1.8
      */
     public <U> void forEachEntry(long parallelismThreshold,
-                                 Function<Map.Entry<K,V>, ? extends U> transformer,
+                                 Function<Map.@Unmodifiable Entry<K,V>, ? extends U> transformer,
                                  Consumer<? super U> action) {
         if (transformer == null || action == null)
             throw new NullPointerException();
@@ -4321,7 +4323,7 @@ public <U> void forEachEntry(long parallelismThreshold,
      * @since 1.8
      */
     public <U> U searchEntries(long parallelismThreshold,
-                               Function<Map.Entry<K,V>, ? extends U> searchFunction) {
+                               Function<Map.@Unmodifiable Entry<K,V>, ? extends U> searchFunction) {
         if (searchFunction == null) throw new NullPointerException();
         return new SearchEntriesTask<K,V,U>
             (null, batchFor(parallelismThreshold), 0, 0, table,
@@ -4339,7 +4341,7 @@ public <U> U searchEntries(long parallelismThreshold,
      * @since 1.8
      */
     public Map.Entry<K,V> reduceEntries(long parallelismThreshold,
-                                        BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
+                                        BiFunction<? super Map.@Unmodifiable Entry<K,V>, ? super Map.@Unmodifiable Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
         if (reducer == null) throw new NullPointerException();
         return new ReduceEntriesTask<K,V>
             (null, batchFor(parallelismThreshold), 0, 0, table,
@@ -4363,7 +4365,7 @@ public Map.Entry<K,V> reduceEntries(long parallelismThreshold,
      * @since 1.8
      */
     public <U> U reduceEntries(long parallelismThreshold,
-                               Function<Map.Entry<K,V>, ? extends U> transformer,
+                               Function<Map.@Unmodifiable Entry<K,V>, ? extends U> transformer,
                                BiFunction<? super U, ? super U, ? extends U> reducer) {
         if (transformer == null || reducer == null)
             throw new NullPointerException();
@@ -4388,7 +4390,7 @@ public <U> U reduceEntries(long parallelismThreshold,
      * @since 1.8
      */
     public double reduceEntriesToDouble(long parallelismThreshold,
-                                        ToDoubleFunction<Map.Entry<K,V>> transformer,
+                                        ToDoubleFunction<Map.@Unmodifiable Entry<K,V>> transformer,
                                         double basis,
                                         DoubleBinaryOperator reducer) {
         if (transformer == null || reducer == null)
@@ -4414,7 +4416,7 @@ public double reduceEntriesToDouble(long parallelismThreshold,
      * @since 1.8
      */
     public long reduceEntriesToLong(long parallelismThreshold,
-                                    ToLongFunction<Map.Entry<K,V>> transformer,
+                                    ToLongFunction<Map.@Unmodifiable Entry<K,V>> transformer,
                                     long basis,
                                     LongBinaryOperator reducer) {
         if (transformer == null || reducer == null)
@@ -4440,7 +4442,7 @@ public long reduceEntriesToLong(long parallelismThreshold,
      * @since 1.8
      */
     public int reduceEntriesToInt(long parallelismThreshold,
-                                  ToIntFunction<Map.Entry<K,V>> transformer,
+                                  ToIntFunction<Map.@Unmodifiable Entry<K,V>> transformer,
                                   int basis,
                                   IntBinaryOperator reducer) {
         if (transformer == null || reducer == null)
@@ -4849,7 +4851,7 @@ public void forEach(Consumer<? super V> action) {
      * entries.  This class cannot be directly instantiated. See
      * {@link #entrySet()}.
      */
-    static final class EntrySetView<K,V> extends CollectionView<K,V,Map.Entry<K,V>>
+    static final @Modifiable class EntrySetView<K,V> extends CollectionView<K,V,Map.Entry<K,V>>
         implements Set<Map.Entry<K,V>>, java.io.Serializable {
         private static final long serialVersionUID = 2249069246763182397L;
         EntrySetView(ConcurrentHashMap<K,V> map) { super(map); }

From 720e98f99892be912bfa4dd9d80cdadda7484da4 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 1 Feb 2026 19:19:33 -0800
Subject: [PATCH 019/119] finished annotating concurrentSkipListMap and
 concurrentSkipListSet

---
 .../concurrent/ConcurrentSkipListMap.java     | 25 +++++++++++--------
 .../concurrent/ConcurrentSkipListSet.java     | 25 +++++++++++--------
 2 files changed, 30 insertions(+), 20 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index bda48d782303..03696ecca13f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -36,6 +36,9 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@@ -122,7 +125,7 @@
  * @param <V> the type of mapped values
  * @since 1.6
  */
-public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
+public @Modifiable class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
     implements ConcurrentNavigableMap<K,V>, Cloneable, Serializable {
     /*
      * This class implements a tree-like two-dimensionally linked skip
@@ -1695,7 +1698,7 @@ public Collection<V> values() {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public Set<Map.Entry<K,V>> entrySet() {
+    public Set<Map.@Unmodifiable Entry<K,V>> entrySet() {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1903,6 +1906,7 @@ public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -1915,6 +1919,7 @@ public V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -2004,7 +2009,7 @@ public ConcurrentNavigableMap<K,V> tailMap(K fromKey) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
-    public Map.Entry<K,V> lowerEntry(K key) {
+    public Map.@Unmodifiable Entry<K,V> lowerEntry(K key) {
         return findNearEntry(key, LT, comparator);
     }
 
@@ -2027,7 +2032,7 @@ public K lowerKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
-    public Map.Entry<K,V> floorEntry(K key) {
+    public Map.@Unmodifiable Entry<K,V> floorEntry(K key) {
         return findNearEntry(key, LT|EQ, comparator);
     }
 
@@ -2050,7 +2055,7 @@ public K floorKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
-    public Map.Entry<K,V> ceilingEntry(K key) {
+    public Map.@Unmodifiable Entry<K,V> ceilingEntry(K key) {
         return findNearEntry(key, GT|EQ, comparator);
     }
 
@@ -2073,7 +2078,7 @@ public K ceilingKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
-    public Map.Entry<K,V> higherEntry(K key) {
+    public Map.@Unmodifiable Entry<K,V> higherEntry(K key) {
         return findNearEntry(key, GT, comparator);
     }
 
@@ -2093,7 +2098,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.Entry<K,V> firstEntry() {
+    public Map.@Unmodifiable Entry<K,V> firstEntry() {
         return findFirstEntry();
     }
 
@@ -2103,7 +2108,7 @@ public Map.Entry<K,V> firstEntry() {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.Entry<K,V> lastEntry() {
+    public Map.@Unmodifiable Entry<K,V> lastEntry() {
         return findLastEntry();
     }
 
@@ -2113,7 +2118,7 @@ public Map.Entry<K,V> lastEntry() {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.Entry<K,V> pollFirstEntry() {
+    public Map.@Unmodifiable Entry<K,V> pollFirstEntry() {
         return doRemoveFirstEntry();
     }
 
@@ -2123,7 +2128,7 @@ public Map.Entry<K,V> pollFirstEntry() {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.Entry<K,V> pollLastEntry() {
+    public Map.@Unmodifiable Entry<K,V> pollLastEntry() {
         return doRemoveLastEntry();
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 1e02531ced65..564ce540b275 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -37,6 +37,9 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -107,7 +110,7 @@
  * @since 1.6
  */
 @AnnotatedFor({"nullness"})
-public class ConcurrentSkipListSet<E extends @NonNull Object>
+public @Modifiable class ConcurrentSkipListSet<E extends @NonNull Object>
     extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable {
 
@@ -296,7 +299,7 @@ public void clear() {
      * @return an iterator over the elements in this set in ascending order
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return m.navigableKeySet().iterator();
     }
 
@@ -305,7 +308,7 @@ public void clear() {
      *
      * @return an iterator over the elements in this set in descending order
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return m.descendingKeySet().iterator();
     }
 
@@ -437,6 +440,7 @@ public E last(@NonEmpty ConcurrentSkipListSet<E> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -449,6 +453,7 @@ public void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
+    @WillThrowUOE
     public void addLast(E e) {
         throw new UnsupportedOperationException();
     }
@@ -459,7 +464,7 @@ public void addLast(E e) {
      *         {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement,
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement,
                                   boolean fromInclusive,
                                   E toElement,
                                   boolean toInclusive) {
@@ -473,7 +478,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement, boolean inclusive) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement, boolean inclusive) {
         return new ConcurrentSkipListSet<E>(m.headMap(toElement, inclusive));
     }
 
@@ -482,7 +487,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code fromElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, boolean inclusive) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, boolean inclusive) {
         return new ConcurrentSkipListSet<E>(m.tailMap(fromElement, inclusive));
     }
 
@@ -492,7 +497,7 @@ public void addLast(E e) {
      *         {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, E toElement) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, E toElement) {
         return subSet(fromElement, true, toElement, false);
     }
 
@@ -501,7 +506,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement) {
         return headSet(toElement, false);
     }
 
@@ -510,7 +515,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code fromElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement) {
         return tailSet(fromElement, true);
     }
 
@@ -526,7 +531,7 @@ public void addLast(E e) {
      *
      * @return a reverse order view of this set
      */
-    public @PolyGrowShrink @PolyNonEmpty NavigableSet<E> descendingSet(@PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> descendingSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return new ConcurrentSkipListSet<E>(m.descendingMap());
     }
 

From d06826e62f4230af55a22640ff1b4b56a2510fca Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 5 Feb 2026 13:36:11 -0800
Subject: [PATCH 020/119] finished annotating iterators.

---
 src/java.base/share/classes/java/lang/Iterable.java     | 3 ++-
 src/java.base/share/classes/java/util/ListIterator.java | 7 ++++---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/Iterable.java b/src/java.base/share/classes/java/lang/Iterable.java
index 2b0cacbbfbc6..72ae4ad6bc07 100644
--- a/src/java.base/share/classes/java/lang/Iterable.java
+++ b/src/java.base/share/classes/java/lang/Iterable.java
@@ -25,6 +25,7 @@
 package java.lang;
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -51,7 +52,7 @@ public interface Iterable<T> {
      *
      * @return an Iterator.
      */
-    @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@PolyGrowShrink @PolyNonEmpty Iterable<T> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterable<T> this);
 
     /**
      * Performs the given action for each element of the {@code Iterable}
diff --git a/src/java.base/share/classes/java/util/ListIterator.java b/src/java.base/share/classes/java/util/ListIterator.java
index b44e644f1d3a..ae50030ca9ce 100644
--- a/src/java.base/share/classes/java/util/ListIterator.java
+++ b/src/java.base/share/classes/java/util/ListIterator.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.GTENegativeOne;
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -166,7 +167,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
-    void remove(@GuardSatisfied ListIterator<E> this);
+    void remove(@Modifiable @GuardSatisfied ListIterator<E> this);
 
     /**
      * Replaces the last element returned by {@link #next} or
@@ -188,7 +189,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
-    void set(@GuardSatisfied ListIterator<E> this, E e);
+    void set(@Modifiable @GuardSatisfied ListIterator<E> this, E e);
 
     /**
      * Inserts the specified element into the list (optional operation).
@@ -210,5 +211,5 @@ public interface ListIterator<E> extends Iterator<E> {
      * @throws IllegalArgumentException if some aspect of this element
      *         prevents it from being added to this list
      */
-    void add(@GuardSatisfied ListIterator<E> this, E e);
+    void add(@Modifiable @GuardSatisfied ListIterator<E> this, E e);
 }

From 65dc3cb5cb37529cac8780fb1f969d75c0c4ad24 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 9 Feb 2026 17:36:41 -0800
Subject: [PATCH 021/119] changed hashSet and TreeSet to growShrink to pass
 all-system test

---
 .../share/classes/java/util/HashSet.java          | 15 +++++++--------
 .../share/classes/java/util/TreeSet.java          | 14 +++++++-------
 2 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 90f1c0ac9a4f..018be7ccf6fe 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -28,9 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowShrink;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -106,7 +105,7 @@
  */
 
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class HashSet<E>
+public @GrowShrink class HashSet<E>
     extends AbstractSet<E>
     implements Set<E>, Cloneable, java.io.Serializable
 {
@@ -122,7 +121,7 @@
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable HashSet() {
+    public @GrowShrink HashSet() {
         map = new HashMap<>();
     }
 
@@ -135,7 +134,7 @@
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @GrowShrink @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -153,7 +152,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @GrowShrink HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -169,7 +168,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable HashSet(@NonNegative int initialCapacity) {
+    public @GrowShrink HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -186,7 +185,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @GrowShrink HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 4a8662e1fc35..d85b376976ab 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowShrink;
 import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -112,13 +112,13 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @Modifiable class TreeSet<E> extends AbstractSet<E>
+public @GrowShrink class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**
      * The backing map.
      */
-    private transient @Modifiable NavigableMap<E,Object> m;
+    private transient @GrowShrink NavigableMap<E,Object> m;
 
     // Dummy value to associate with an Object in the backing Map
     private static final Object PRESENT = new Object();
@@ -143,7 +143,7 @@
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable TreeSet() {
+    public @GrowShrink TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -160,7 +160,7 @@
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @GrowShrink TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -178,7 +178,7 @@
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @GrowShrink @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -190,7 +190,7 @@
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @GrowShrink @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }

From 4bd5c4ff80e1cb446d44bc5da091ac91e3387cb1 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 9 Feb 2026 19:15:55 -0800
Subject: [PATCH 022/119] fixed annotation in AbstractCollection due to merge
 conflict.

---
 .../share/classes/java/util/AbstractCollection.java         | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index be73f3fa6d89..bc49adad9eaf 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -394,7 +394,7 @@ public boolean addAll(@Modifiable @GuardSatisfied AbstractCollection<E> this, Co
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean removeAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -429,7 +429,7 @@ public boolean removeAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this,
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean retainAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -458,7 +458,7 @@ public boolean retainAll(@GuardSatisfied @Shrinkable AbstractCollection<E> this,
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
-    public void clear(@GuardSatisfied @Shrinkable AbstractCollection<E> this) {
+    public void clear(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();

From ff6662bbb803386eaf6b7c4ccf22d4b6896fee91 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 11 Feb 2026 16:48:02 -0800
Subject: [PATCH 023/119] minor changes so that the new type system can pass
 all-system test

---
 src/java.base/share/classes/java/util/Collection.java         | 3 ++-
 src/java.base/share/classes/java/util/Queue.java              | 4 ++--
 .../share/classes/java/util/concurrent/BlockingQueue.java     | 4 ++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 612a0f5cb0f5..8d76a2d1465b 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -660,7 +661,7 @@ default boolean removeIf(@Modifiable @CanShrink Collection<E> this, Predicate<?
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this collection
      */
-    void clear(@Modifiable @GuardSatisfied @CanShrink Collection<E> this);
+    void clear(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index 26ed1bf6ce50..cc485f39ea81 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -148,7 +148,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @Modifiable interface Queue<E> extends Collection<E> {
+public @GrowShrink interface Queue<E> extends Collection<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do so
      * immediately without violating capacity restrictions, returning
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
index c136c28ef52c..1ffcea7dba68 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
@@ -362,7 +362,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Modifiable Collection<? super E> c);
+    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c);
 
     /**
      * Removes at most the given number of available elements from
@@ -387,5 +387,5 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements);
+    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements);
 }

From 20a219eded4b262258a89e79a8f57dfa1b1472ce Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 11 Feb 2026 23:04:28 -0800
Subject: [PATCH 024/119] finished revising list annotations

---
 .../classes/java/util/AbstractCollection.java | 16 +++++----
 .../share/classes/java/util/AbstractList.java | 18 +++++-----
 .../java/util/AbstractSequentialList.java     | 10 +++---
 .../share/classes/java/util/Collection.java   | 14 ++++----
 .../share/classes/java/util/List.java         | 36 ++++++++++---------
 .../java/util/SequencedCollection.java        | 12 ++++---
 .../util/concurrent/CopyOnWriteArrayList.java | 10 +++---
 7 files changed, 63 insertions(+), 53 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index bc49adad9eaf..a91bb5e4ad57 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -31,8 +31,10 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -280,7 +282,7 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IllegalStateException         {@inheritDoc}
      */
-    public boolean add(@Modifiable @GuardSatisfied AbstractCollection<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -301,7 +303,7 @@ public boolean add(@Modifiable @GuardSatisfied AbstractCollection<E> this, E e)
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
-    public boolean remove(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
@@ -364,7 +366,7 @@ public boolean containsAll(@UnknownModifiability @GuardSatisfied AbstractCollect
      *
      * @see #add(Object)
      */
-    public boolean addAll(@Modifiable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
         boolean modified = false;
         for (E e : c)
             if (add(e))
@@ -394,7 +396,7 @@ public boolean addAll(@Modifiable @GuardSatisfied AbstractCollection<E> this, Co
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean removeAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -429,7 +431,7 @@ public boolean removeAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollecti
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean retainAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -458,7 +460,7 @@ public boolean retainAll(@Modifiable @GuardSatisfied @CanShrink AbstractCollecti
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
-    public void clear(@Modifiable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index f5028447a472..2dea3eee4646 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -31,7 +31,9 @@
 import org.checkerframework.checker.index.qual.IndexOrHigh;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -135,7 +137,7 @@ protected AbstractList() {
      *         prevents it from being added to this list
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@Modifiable @GuardSatisfied AbstractList<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
         add(size(), e);
         return true;
     }
@@ -161,7 +163,7 @@ public boolean add(@Modifiable @GuardSatisfied AbstractList<E> this, E e) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E set(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
+    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -178,7 +180,7 @@ public E set(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public void add(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
+    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -192,7 +194,7 @@ public void add(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E remove(@Modifiable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
         throw new UnsupportedOperationException();
     }
 
@@ -270,7 +272,7 @@ public E remove(@Modifiable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this list
      */
-    public void clear(@Modifiable @GuardSatisfied @CanShrink AbstractList<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
         removeRange(0, size());
     }
 
@@ -294,7 +296,7 @@ public void clear(@Modifiable @GuardSatisfied @CanShrink AbstractList<E> this) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public boolean addAll(@Modifiable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
         rangeCheckForAdd(index);
         boolean modified = false;
         for (E e : c) {
@@ -629,7 +631,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractList<E> this)
      * @param fromIndex index of first element to be removed
      * @param toIndex index after last element to be removed
      */
-    protected void removeRange(@Modifiable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    protected void removeRange(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 660d5c9e7900..dae955bcf7d6 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-Import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -127,7 +127,7 @@ public E get(@UnknownModifiability @GuardSatisfied AbstractSequentialList<E> thi
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E set(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public E set(@Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             ListIterator<E> e = listIterator(index);
             E oldVal = e.next();
@@ -158,7 +158,7 @@ public E set(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int ind
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public void add(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public void add(@Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             listIterator(index).add(element);
         } catch (NoSuchElementException exc) {
@@ -183,7 +183,7 @@ public void add(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E remove(@Modifiable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
         try {
             ListIterator<E> e = listIterator(index);
             E outCast = e.next();
@@ -226,7 +226,7 @@ public E remove(@Modifiable @GuardSatisfied @CanShrink AbstractSequentialList<E>
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public boolean addAll(@Modifiable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
         try {
             boolean modified = false;
             ListIterator<E> e1 = listIterator(index);
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 8d76a2d1465b..81e1951c2ad7 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -32,8 +32,8 @@
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -494,7 +494,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         time due to insertion restrictions
      */
     @EnsuresNonEmpty("this")
-    boolean add(@Modifiable @GuardSatisfied Collection<E> this, E e);
+    boolean add(@Growable @GuardSatisfied Collection<E> this, E e);
 
     /**
      * Removes a single instance of the specified element from this
@@ -516,7 +516,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this collection
      */
-    boolean remove(@Modifiable @GuardSatisfied @CanShrink Collection<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Operations
@@ -568,7 +568,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         this time due to insertion restrictions
      * @see #add(Object)
      */
-    boolean addAll(@Modifiable @GuardSatisfied Collection<E> this, Collection<? extends E> c);
+    boolean addAll(@Growable @GuardSatisfied Collection<E> this, Collection<? extends E> c);
 
     /**
      * Removes all of this collection's elements that are also contained in the
@@ -593,7 +593,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@Modifiable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements of this collection that satisfy the given
@@ -617,7 +617,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         supported.
      * @since 1.8
      */
-    default boolean removeIf(@Modifiable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+    default boolean removeIf(@Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
@@ -652,7 +652,7 @@ default boolean removeIf(@Modifiable @CanShrink Collection<E> this, Predicate<?
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean retainAll(@Modifiable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements from this collection (optional operation).
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 41b343ae6af9..7ffed30a226c 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -35,9 +35,11 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -305,7 +307,7 @@ public interface List<E> extends SequencedCollection<E> {
     @ReleasesNoLocks
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
-    boolean add(@Modifiable @GuardSatisfied List<E> this, E e);
+    boolean add(@Growable @GuardSatisfied List<E> this, E e);
 
     /**
      * Removes the first occurrence of the specified element from this list,
@@ -329,7 +331,7 @@ public interface List<E> extends SequencedCollection<E> {
      *         is not supported by this list
      */
     @SideEffectsOnly("this")
-    boolean remove(@Modifiable @GuardSatisfied @CanShrink List<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @GuardSatisfied @CanShrink List<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Modification Operations
@@ -378,7 +380,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@Modifiable @GuardSatisfied List<E> this, Collection<? extends E> c);
+    boolean addAll(@Growable @GuardSatisfied List<E> this, Collection<? extends E> c);
 
     /**
      * Inserts all of the elements in the specified collection into this
@@ -409,7 +411,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@Modifiable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
+    boolean addAll(@Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
 
     /**
      * Removes from this list all of its elements that are contained in the
@@ -429,7 +431,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@Modifiable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Retains only the elements in this list that are contained in the
@@ -451,7 +453,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean retainAll(@Modifiable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Replaces each element of this list with the result of applying the
@@ -482,7 +484,7 @@ public interface List<E> extends SequencedCollection<E> {
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default void replaceAll(@Modifiable List<E> this, UnaryOperator<E> operator) {
+    default void replaceAll(@Replaceable List<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final ListIterator<E> li = this.listIterator();
         while (li.hasNext()) {
@@ -550,7 +552,7 @@ default void replaceAll(@Modifiable List<E> this, UnaryOperator<E> operator) {
      * @since 1.8
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
+    default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
         Object[] a = this.toArray();
         Arrays.sort(a, (Comparator) c);
         ListIterator<E> i = this.listIterator();
@@ -567,7 +569,7 @@ default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this list
      */
-    void clear(@Modifiable @GuardSatisfied @CanShrink List<E> this);
+    void clear(@Shrinkable @GuardSatisfied @CanShrink List<E> this);
 
 
     // Comparison and hashing
@@ -641,7 +643,7 @@ default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
-    E set(@Modifiable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
+    E set(@Replaceable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
 
     /**
      * Inserts the specified element at the specified position in this list
@@ -664,7 +666,7 @@ default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
      */
     @ReleasesNoLocks
     @SideEffectsOnly("this")
-    void add(@Modifiable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
+    void add(@Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
 
     /**
      * Removes the element at the specified position in this list (optional
@@ -680,7 +682,7 @@ default void sort(@Modifiable List<E> this, Comparator<? super E> c) {
      *         ({@code index < 0 || index >= size()})
      */
     @ReleasesNoLocks
-    E remove(@Modifiable @GuardSatisfied @CanShrink List<E> this, @IndexFor({"this"}) int index);
+    E remove(@Shrinkable @GuardSatisfied @CanShrink List<E> this, @IndexFor({"this"}) int index);
 
 
     // Search Operations
@@ -848,7 +850,7 @@ default Spliterator<E> spliterator() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default void addFirst(@Modifiable List<E> this, E e) {
+    default void addFirst(@Growable List<E> this, E e) {
         this.add(0, e);
     }
 
@@ -862,7 +864,7 @@ default void addFirst(@Modifiable List<E> this, E e) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default void addLast(@Modifiable List<E> this, E e) {
+    default void addLast(@Growable List<E> this, E e) {
         this.add(e);
     }
 
@@ -913,7 +915,7 @@ default E getLast() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst(@Modifiable List<E> this) {
+    default E removeFirst(@Shrinkable List<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
@@ -932,7 +934,7 @@ default E removeFirst(@Modifiable List<E> this) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast(@Modifiable List<E> this) {
+    default E removeLast(@Shrinkable List<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 0eae7eab4cc0..af1567e64e52 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -26,7 +26,9 @@
 package java.util;
 
 
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+
 
 /**
  * A collection that has a well-defined encounter order, that supports operations at both ends,
@@ -106,7 +108,7 @@ public interface SequencedCollection<E> extends Collection<E> {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default void addFirst(@Modifiable SequencedCollection<E> this, E e) {
+    default void addFirst(@Growable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -124,7 +126,7 @@ default void addFirst(@Modifiable SequencedCollection<E> this, E e) {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default void addLast(@Modifiable SequencedCollection<E> this, E e) {
+    default void addLast(@Growable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -175,7 +177,7 @@ default E getLast() {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default E removeFirst(@Modifiable SequencedCollection<E> this) {
+    default E removeFirst(@Shrinkable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
         it.remove();
@@ -197,7 +199,7 @@ default E removeFirst(@Modifiable SequencedCollection<E> this) {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
-    default E removeLast(@Modifiable SequencedCollection<E> this) {
+    default E removeLast(@Shrinkable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index c1e3a26613db..675648288395 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -37,6 +37,8 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -113,7 +115,7 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this list
  */
-public class CopyOnWriteArrayList<E>
+public @Modifiable class CopyOnWriteArrayList<E>
     implements List<E>, RandomAccess, Cloneable, java.io.Serializable {
     private static final long serialVersionUID = 8673264195747942595L;
 
@@ -1130,7 +1132,7 @@ public int hashCode() {
      *
      * @return an iterator over the elements in this list in proper sequence
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArrayList<E> this) {
+    public @Unmodifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArrayList<E> this) {
         return new COWIterator<E>(getArray(), 0);
     }
 
@@ -1142,7 +1144,7 @@ public int hashCode() {
      * traversing the iterator. The iterator does <em>NOT</em> support the
      * {@code remove}, {@code set} or {@code add} methods.
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArrayList<E> this) {
+    public @Unmodifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArrayList<E> this) {
         return new COWIterator<E>(getArray(), 0);
     }
 
@@ -1156,7 +1158,7 @@ public int hashCode() {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink CopyOnWriteArrayList<E> this, int index) {
+    public @Unmodifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink CopyOnWriteArrayList<E> this, int index) {
         Object[] es = getArray();
         int len = es.length;
         if (index < 0 || index > len)

From e7847033dac3c09ee775961f5250aadf128a1950 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 11 Feb 2026 23:38:33 -0800
Subject: [PATCH 025/119] changed the annotation on set

---
 .../share/classes/java/util/AbstractSet.java     |  4 ++--
 .../share/classes/java/util/NavigableSet.java    |  6 +++---
 src/java.base/share/classes/java/util/Set.java   | 16 ++++++++--------
 .../share/classes/java/util/SortedSet.java       |  6 +++---
 .../java/util/concurrent/ConcurrentHashMap.java  |  2 +-
 .../util/concurrent/CopyOnWriteArraySet.java     |  6 ++++--
 6 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index 19e86415cd2d..777d0f98684e 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
@@ -176,7 +176,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractSet<E> this) {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    public boolean removeAll(@Modifiable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
 
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 705644210f64..300a891ff253 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -351,7 +351,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst(@Modifiable NavigableSet<E> this) {
+    default E removeFirst(@Shrinkable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
@@ -370,7 +370,7 @@ default E removeFirst(@Modifiable NavigableSet<E> this) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast(@Modifiable NavigableSet<E> this) {
+    default E removeLast(@Shrinkable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 1de6dfba93ad..31a2db1c96a7 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -29,9 +29,9 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -284,7 +284,7 @@ public interface Set<E> extends Collection<E> {
      *         prevents it from being added to this set
      */
     @EnsuresNonEmpty("this")
-    boolean add(@Modifiable @GuardSatisfied Set<E> this, E e);
+    boolean add(@Growable @GuardSatisfied Set<E> this, E e);
 
 
     /**
@@ -308,7 +308,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this set
      */
-    boolean remove(@Modifiable @GuardSatisfied Set<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @GuardSatisfied Set<E> this, @UnknownSignedness Object o);
 
 
     // Bulk Operations
@@ -358,7 +358,7 @@ public interface Set<E> extends Collection<E> {
      * @see #add(Object)
      */
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends E> c);
+    boolean addAll(@Growable @GuardSatisfied Set<E> this, Collection<? extends E> c);
 
     /**
      * Retains only the elements in this set that are contained in the
@@ -381,7 +381,7 @@ public interface Set<E> extends Collection<E> {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    boolean retainAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes from this set all of its elements that are contained in the
@@ -404,7 +404,7 @@ public interface Set<E> extends Collection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
-    boolean removeAll(@Modifiable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements from this set (optional operation).
@@ -413,7 +413,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code clear} method
      *         is not supported by this set
      */
-    void clear(@Modifiable @GuardSatisfied Set<E> this);
+    void clear(@Shrinkable @GuardSatisfied Set<E> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 375793aece47..94535ec80811 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -352,7 +352,7 @@ default E getLast() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeFirst(@Modifiable SortedSet<E> this) {
+    default E removeFirst(@Shrinkable SortedSet<E> this) {
         E e = this.first();
         this.remove(e);
         return e;
@@ -370,7 +370,7 @@ default E removeFirst(@Modifiable SortedSet<E> this) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
-    default E removeLast(@Modifiable SortedSet<E> this) {
+    default E removeLast(@Shrinkable SortedSet<E> this) {
         E e = this.last();
         this.remove(e);
         return e;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index e5c0c0efc050..b7c667428d5a 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -4643,7 +4643,7 @@ public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness
      *
      * @since 1.8
      */
-    public static final class KeySetView<K,V> extends CollectionView<K,V,K>
+    public static final @Modifiable class KeySetView<K,V> extends CollectionView<K,V,K>
         implements Set<K>, java.io.Serializable {
         private static final long serialVersionUID = 7249069246763182397L;
         @SuppressWarnings("serial") // Conditionally serializable
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
index b0078296d26e..1a9ff75c0c03 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
@@ -37,6 +37,8 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -110,7 +112,7 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this set
  */
-public class CopyOnWriteArraySet<E> extends AbstractSet<E>
+public @Modifiable class CopyOnWriteArraySet<E> extends AbstractSet<E>
         implements java.io.Serializable {
     private static final long serialVersionUID = 5457747651344034263L;
 
@@ -407,7 +409,7 @@ public boolean retainAll(Collection<? extends @NonNull @UnknownSignedness Object
      *
      * @return an iterator over the elements in this set
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArraySet<E> this) {
+    public @Unmodifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty CopyOnWriteArraySet<E> this) {
         return al.iterator();
     }
 

From 64bf3127d5bbee1f0433ab3360f0d844a37e214b Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 12 Feb 2026 12:08:45 -0800
Subject: [PATCH 026/119] finished annotating queue

---
 src/java.base/share/classes/java/util/Deque.java   | 14 ++++++--------
 .../java/util/concurrent/ArrayBlockingQueue.java   |  5 +++--
 .../java/util/concurrent/BlockingQueue.java        |  1 +
 .../util/concurrent/ConcurrentLinkedDeque.java     |  3 ++-
 .../classes/java/util/concurrent/DelayQueue.java   |  5 +++--
 .../java/util/concurrent/LinkedBlockingDeque.java  |  5 +++--
 .../java/util/concurrent/LinkedBlockingQueue.java  |  5 +++--
 .../java/util/concurrent/LinkedTransferQueue.java  |  5 +++--
 .../util/concurrent/PriorityBlockingQueue.java     |  5 +++--
 .../java/util/concurrent/SynchronousQueue.java     |  5 +++--
 10 files changed, 30 insertions(+), 23 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 445f32a4edb8..e2e8f3ed88d4 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -40,8 +40,6 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -240,7 +238,7 @@
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addFirst(@Modifiable @GuardSatisfied Deque<E> this, E e);
+    void addFirst(@GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -262,7 +260,7 @@
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addLast(@Modifiable @GuardSatisfied Deque<E> this, E e);
+    void addLast(@GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque unless it would
@@ -308,7 +306,7 @@
      * @return the head of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeFirst(@Modifiable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E removeFirst(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque.  This method
@@ -318,7 +316,7 @@
      * @return the tail of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeLast(@Modifiable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E removeLast(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the first element of this deque,
@@ -326,7 +324,7 @@
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollFirst(@Modifiable @GuardSatisfied @CanShrink Deque<E> this);
+    @Nullable E pollFirst(@GuardSatisfied @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque,
@@ -334,7 +332,7 @@
      *
      * @return the tail of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollLast(@Modifiable @GuardSatisfied @CanShrink Deque<E> this);
+    @Nullable E pollLast(@GuardSatisfied @CanShrink Deque<E> this);
 
     /**
      * Retrieves, but does not remove, the first element of this deque.
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 0d40cfae57c2..31dca4513aea 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -718,7 +719,7 @@ private static void circularClear(Object[] items, int i, int end) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -728,7 +729,7 @@ public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Modif
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
index 1ffcea7dba68..8561dc415bf0 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index b3a9cf89266e..9c390690cc60 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -112,7 +113,7 @@
  * @param <E> the type of elements held in this deque
  */
 @AnnotatedFor({"nullness"})
-public class ConcurrentLinkedDeque<E extends @NonNull Object>
+public @Modifiable class ConcurrentLinkedDeque<E extends @NonNull Object>
     extends AbstractCollection<E>
     implements Deque<E>, java.io.Serializable {
 
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 72db082227fe..09d38a174dfd 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,6 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -387,7 +388,7 @@ public int size() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -397,7 +398,7 @@ public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Modifiable Co
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 0a6e918d9b3d..d640e732d39c 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -744,7 +745,7 @@ public int remainingCapacity() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -754,7 +755,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Modi
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 95a3d643a3e3..82f002fa2f12 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -706,7 +707,7 @@ public void clear(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -716,7 +717,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Modi
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 7aed5196d7ae..88f512bfbaac 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -1325,7 +1326,7 @@ public E poll(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1339,7 +1340,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Colle
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index e5d00dcf2cd3..63083ab15d7a 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -728,7 +729,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -738,7 +739,7 @@ public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Mo
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index 7ddfa8ffdfd9..236aea0d1ffd 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -40,6 +40,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -1104,7 +1105,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Modifiable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1120,7 +1121,7 @@ public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Modifia
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Modifiable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();

From d53041a56d2e7d2ffbb94512f42b253ae36a2b76 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 12 Feb 2026 13:54:25 -0800
Subject: [PATCH 027/119] fixed annotations in Collections

---
 .../share/classes/java/util/Arrays.java       |  4 +--
 .../share/classes/java/util/Collections.java  | 27 ++++++++++---------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index f425b39811a2..b293cc708df7 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.SearchIndexFor;
 import org.checkerframework.checker.interning.qual.PolyInterned;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.mustcall.qual.MustCallUnknown;
 import org.checkerframework.checker.mustcall.qual.PolyMustCall;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -4274,7 +4274,7 @@ private static boolean[] copyOfRangeBoolean(boolean[] original, int from, int to
     @SafeVarargs
     @SideEffectFree
     @SuppressWarnings("varargs")
-    public static <T> @Modifiable @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
+    public static <T> @Replaceable @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
         return new ArrayList<>(a);
     }
 
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 8be1aa8d3d53..51de9366a528 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -31,8 +31,9 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -172,7 +173,7 @@ private Collections() {
      * @see List#sort(Comparator)
      */
     @SuppressWarnings("unchecked")
-    public static <T extends Comparable<? super T>> void sort(@Modifiable List<T> list) {
+    public static <T extends Comparable<? super T>> void sort(@Replaceable List<T> list) {
         list.sort(null);
     }
 
@@ -206,7 +207,7 @@ public static <T extends Comparable<? super T>> void sort(@Modifiable List<T> li
      * @see List#sort(Comparator)
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    public static <T> void sort(@Modifiable List<T> list, @Nullable Comparator<? super T> c) {
+    public static <T> void sort(@Replaceable List<T> list, @Nullable Comparator<? super T> c) {
         list.sort(c);
     }
 
@@ -412,7 +413,7 @@ else if (cmp > 0)
      * @see    List#reversed List.reversed
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void reverse(@Modifiable @GuardSatisfied List<?> list) {
+    public static void reverse(@Replaceable @GuardSatisfied List<?> list) {
         int size = list.size();
         if (size < REVERSE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=0, mid=size>>1, j=size-1; i<mid; i++, j--)
@@ -459,7 +460,7 @@ public static void reverse(@Modifiable @GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or
      *         its list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@Modifiable @GuardSatisfied List<?> list) {
+    public static void shuffle(@Replaceable @GuardSatisfied List<?> list) {
         Random rnd = r;
         if (rnd == null)
             r = rnd = new Random(); // harmless race.
@@ -482,7 +483,7 @@ public static void shuffle(@Modifiable @GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@Modifiable List<?> list, Random rnd) {
+    public static void shuffle(@Replaceable List<?> list, Random rnd) {
         shuffle(list, (RandomGenerator) rnd);
     }
 
@@ -511,7 +512,7 @@ public static void shuffle(@Modifiable List<?> list, Random rnd) {
      * @since 21
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void shuffle(@Modifiable @GuardSatisfied List<?> list, RandomGenerator rnd) {
+    public static void shuffle(@Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
         int size = list.size();
         if (size < SHUFFLE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=size; i>1; i--)
@@ -549,7 +550,7 @@ public static void shuffle(@Modifiable @GuardSatisfied List<?> list, RandomGener
      * @since 1.4
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void swap(@Modifiable @GuardSatisfied List<?> list, int i, int j) {
+    public static void swap(@Replaceable @GuardSatisfied List<?> list, int i, int j) {
         // instead of using a raw type here, it's possible to capture
         // the wildcard but it will require a call to a supplementary
         // private method
@@ -578,7 +579,7 @@ private static void swap(Object[] arr, int i, int j) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void fill(@Modifiable @GuardSatisfied List<? super T> list, T obj) {
+    public static <T> void fill(@Replaceable @GuardSatisfied List<? super T> list, T obj) {
         int size = list.size();
 
         if (size < FILL_THRESHOLD || list instanceof RandomAccess) {
@@ -611,7 +612,7 @@ public static <T> void fill(@Modifiable @GuardSatisfied List<? super T> list, T
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@Modifiable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
+    public static <T> void copy(@Replaceable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -839,7 +840,7 @@ public static <T> T max(@UnknownModifiability Collection<? extends T> coll, @Nul
      *         its list-iterator does not support the {@code set} operation.
      * @since 1.4
      */
-    public static void rotate(@Modifiable @GuardSatisfied List<?> list, int distance) {
+    public static void rotate(@Replaceable @GuardSatisfied List<?> list, int distance) {
         if (list instanceof RandomAccess || list.size() < ROTATE_THRESHOLD)
             rotate1(list, distance);
         else
@@ -903,7 +904,7 @@ private static void rotate2(List<?> list, int distance) {
      *         its list-iterator does not support the {@code set} operation.
      * @since  1.4
      */
-    public static <T> boolean replaceAll(@Modifiable List<T> list, @Nullable T oldVal, T newVal) {
+    public static <T> boolean replaceAll(@Replaceable List<T> list, @Nullable T oldVal, T newVal) {
         boolean result = false;
         int size = list.size();
         if (size < REPLACEALL_THRESHOLD || list instanceof RandomAccess) {
@@ -6109,7 +6110,7 @@ public static boolean disjoint(@UnknownModifiability Collection<?> c1, @UnknownM
      * @since 1.5
      */
     @SafeVarargs
-    public static <T> boolean addAll(@Modifiable @GuardSatisfied Collection<? super T> c, T... elements) {
+    public static <T> boolean addAll(@Growable @GuardSatisfied Collection<? super T> c, T... elements) {
         boolean result = false;
         for (T element : elements)
             result |= c.add(element);

From b407a53bc87693e0b1b3b312e08815a6e5334921 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 12 Feb 2026 16:12:53 -0800
Subject: [PATCH 028/119] finished fixing annotation for map besides keySet,
 entrySet, and values

---
 .../share/classes/java/util/AbstractMap.java  | 10 ++++---
 .../share/classes/java/util/EnumMap.java      |  3 +-
 .../classes/java/util/LinkedHashMap.java      | 10 +++----
 .../share/classes/java/util/Map.java          | 30 +++++++++++--------
 .../share/classes/java/util/NavigableMap.java |  6 ++--
 .../share/classes/java/util/SequencedMap.java | 11 +++----
 .../share/classes/java/util/TreeMap.java      |  8 ++---
 .../java/util/concurrent/ConcurrentMap.java   | 17 ++++++-----
 8 files changed, 53 insertions(+), 42 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 23b7dfd584f9..c78567322d81 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -29,6 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowReplace;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -240,7 +242,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      */
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@Modifiable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
+    public @Nullable V put(@GrowReplace @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
         throw new UnsupportedOperationException();
     }
 
@@ -266,7 +268,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
-    public @Nullable V remove(@Modifiable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         Entry<K,V> correctEntry = null;
         if (key==null) {
@@ -311,7 +313,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public void putAll(@Modifiable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@GrowReplace @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
     }
@@ -328,7 +330,7 @@ public void putAll(@Modifiable @GuardSatisfied AbstractMap<K, V> this, Map<? ext
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
-    public void clear(@Modifiable @GuardSatisfied AbstractMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
         entrySet().clear();
     }
 
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 1d170eda8739..9921309d39a8 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -97,7 +98,7 @@
  * @since 1.5
  */
 @AnnotatedFor({"nullness", "index"})
-public class EnumMap<K extends Enum<K>, V> extends AbstractMap<K, V>
+public @Modifiable class EnumMap<K extends Enum<K>, V> extends AbstractMap<K, V>
     implements java.io.Serializable, Cloneable
 {
     /**
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 4029c71fe3f9..8a88fc64f64b 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -451,7 +451,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
+    public LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor);
         accessOrder = false;
     }
@@ -467,7 +467,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @param  initialCapacity the initial capacity
      * @throws IllegalArgumentException if the initial capacity is negative
      */
-    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity) {
+    public LinkedHashMap(@NonNegative int initialCapacity) {
         super(initialCapacity);
         accessOrder = false;
     }
@@ -476,7 +476,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * Constructs an empty insertion-ordered {@code LinkedHashMap} instance
      * with the default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable LinkedHashMap() {
+    public LinkedHashMap() {
         super();
         accessOrder = false;
     }
@@ -490,7 +490,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @param  m the map whose mappings are to be placed in this map
      * @throws NullPointerException if the specified map is null
      */
-    public @Modifiable @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         super();
         accessOrder = false;
         putMapEntries(m, false);
@@ -507,7 +507,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity,
+    public LinkedHashMap(@NonNegative int initialCapacity,
                          float loadFactor,
                          boolean accessOrder) {
         super(initialCapacity, loadFactor);
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 31543928decc..cb00587d024c 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -30,8 +30,12 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.GrowReplace;
+import org.checkerframework.checker.modifiability.qual.ShrinkReplace;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -307,7 +311,7 @@ public interface Map<K, V> {
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @EnsuresNonEmpty("this")
-    @Nullable V put(@Modifiable @GuardSatisfied Map<K, V> this, K key, V value);
+    @Nullable V put(@GrowReplace @GuardSatisfied Map<K, V> this, K key, V value);
 
     /**
      * Removes the mapping for a key from this map if it is present
@@ -338,7 +342,7 @@ public interface Map<K, V> {
      *         map does not permit null keys ({@linkplain Collection##optional-restrictions optional})
      */
     @CFComment("nullness: key is not @Nullable because this map might not permit null values")
-    @Nullable V remove(@Modifiable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
+    @Nullable V remove(@Shrinkable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
 
     // Bulk Operations
@@ -364,7 +368,7 @@ public interface Map<K, V> {
      * @throws IllegalArgumentException if some property of a key or value in
      *         the specified map prevents it from being stored in this map
      */
-    void putAll(@Modifiable @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
+    void putAll(@GrowReplace @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
 
     /**
      * Removes all of the mappings from this map (optional operation).
@@ -373,7 +377,7 @@ public interface Map<K, V> {
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this map
      */
-    void clear(@Modifiable @GuardSatisfied Map<K, V> this);
+    void clear(@Shrinkable @GuardSatisfied Map<K, V> this);
 
 
     // Views
@@ -537,7 +541,7 @@ interface Entry<K, V> {
          *         required to, throw this exception if the entry has been
          *         removed from the backing map.
          */
-        V setValue(Map.@Modifiable @GuardSatisfied Entry<K, V> this, V value);
+        V setValue(Map.@Replaceable @GuardSatisfied Entry<K, V> this, V value);
 
         /**
          * Compares the specified object with this entry for equality.
@@ -824,7 +828,7 @@ default void forEach(@NonLeaked BiConsumer<? super K, ? super V> action) {
      *         removed during iteration
      * @since 1.8
      */
-    default void replaceAll(@Modifiable Map<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
+    default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         for (Map.Entry<K, V> entry : entrySet()) {
             K k;
@@ -891,7 +895,7 @@ default void replaceAll(@Modifiable Map<K, V> this, BiFunction<? super K, ? supe
      * @since 1.8
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    default @Nullable V putIfAbsent(@Modifiable Map<K, V> this, K key, V value) {
+    default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {
         V v = get(key);
         if (v == null) {
             v = put(key, value);
@@ -935,7 +939,7 @@ default void replaceAll(@Modifiable Map<K, V> this, BiFunction<? super K, ? supe
      * @since 1.8
      */
     @CFComment("nullness: key and value are not @Nullable because this map might not permit null values")
-    default boolean remove(@Modifiable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+    default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         Object curValue = get(key);
         if (!Objects.equals(curValue, value) ||
             (curValue == null && !containsKey(key))) {
@@ -985,7 +989,7 @@ default boolean remove(@Modifiable Map<K, V> this, @GuardSatisfied @UnknownSigne
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
-    default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValue) {
+    default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {
         Object curValue = get(key);
         if (!Objects.equals(curValue, oldValue) ||
             (curValue == null && !containsKey(key))) {
@@ -1033,7 +1037,7 @@ default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValu
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
-    default @Nullable V replace(@Modifiable Map<K, V> this, K key, V value) {
+    default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {
         V curValue;
         if (((curValue = get(key)) != null) || containsKey(key)) {
             curValue = put(key, value);
@@ -1115,7 +1119,7 @@ default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValu
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
-    default @PolyNull V computeIfAbsent(@Modifiable Map<K, V> this, K key,
+    default @PolyNull V computeIfAbsent(@Growable Map<K, V> this, K key,
             Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V v;
@@ -1192,7 +1196,7 @@ default boolean replace(@Modifiable Map<K, V> this, K key, V oldValue, V newValu
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
-    default @Nullable V computeIfPresent(@Modifiable Map<K, V> this, K key,
+    default @Nullable V computeIfPresent(@ShrinkReplace Map<K, V> this, K key,
             BiFunction<? super K, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V oldValue;
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 7835c8504be5..13a51e210e14 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -253,7 +253,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed first entry of this map,
      *         or {@code null} if this map is empty
      */
-    Map.@Nullable Entry<K,V> pollFirstEntry(@Modifiable @GuardSatisfied NavigableMap<K, V> this);
+    Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
      * Removes and returns a key-value mapping associated with
@@ -262,7 +262,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed last entry of this map,
      *         or {@code null} if this map is empty
      */
-    Map.@Nullable Entry<K,V> pollLastEntry(@Modifiable @GuardSatisfied NavigableMap<K, V> this);
+    Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order view of the mappings contained in this map.
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 0711dffb79a6..6fa7527fd60d 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -27,7 +27,8 @@
 
 import jdk.internal.util.NullableKeyValueHolder;
 
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowReplace;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 
 /**
  * A Map that has a well-defined encounter order, that supports operations at both ends, and
@@ -186,7 +187,7 @@ default Map.Entry<K,V> lastEntry() {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default Map.Entry<K,V> pollFirstEntry(@Modifiable SequencedMap<K,V> this) {
+    default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {
         var it = entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
@@ -211,7 +212,7 @@ default Map.Entry<K,V> pollFirstEntry(@Modifiable SequencedMap<K,V> this) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default Map.Entry<K,V> pollLastEntry(@Modifiable SequencedMap<K,V> this) {
+    default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
         var it = reversed().entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
@@ -237,7 +238,7 @@ default Map.Entry<K,V> pollLastEntry(@Modifiable SequencedMap<K,V> this) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putFirst(@Modifiable SequencedMap<K,V> this, K k, V v) {
+    default V putFirst(@GrowReplace SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -256,7 +257,7 @@ default V putFirst(@Modifiable SequencedMap<K,V> this, K k, V v) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putLast(@Modifiable SequencedMap<K,V> this, K k, V v) {
+    default V putLast(@GrowReplace SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 901afedb715f..e0db302cd8d4 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -178,7 +178,7 @@
      * {@code put(Object key, Object value)} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable TreeMap() {
+    public TreeMap() {
         comparator = null;
     }
 
@@ -196,7 +196,7 @@
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public @Modifiable TreeMap(@Nullable Comparator<? super K> comparator) {
+    public TreeMap(@Nullable Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -214,7 +214,7 @@
      *         or are not mutually comparable
      * @throws NullPointerException if the specified map is null
      */
-    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         comparator = null;
         putAll(m);
     }
@@ -228,7 +228,7 @@
      *         and whose comparator is to be used to sort this map
      * @throws NullPointerException if the specified map is null
      */
-    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
         comparator = m.comparator();
         try {
             buildFromSorted(m.size(), m.entrySet().iterator(), null, null);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 32286c17da65..2677b4aedca4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -37,6 +37,9 @@
 
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.ShrinkReplace;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -167,7 +170,7 @@ default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<?
      *         or value prevents it from being stored in this map
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    @Nullable V putIfAbsent(@Modifiable ConcurrentMap<K,V> this, K key, V value);
+    @Nullable V putIfAbsent(@Growable ConcurrentMap<K,V> this, K key, V value);
 
     /**
      * Removes the entry for a key only if currently mapped to a given value.
@@ -198,7 +201,7 @@ default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<?
      *         and this map does not permit null keys or values
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean remove(@Modifiable ConcurrentMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value);
+    boolean remove(@Shrinkable ConcurrentMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value);
 
     /**
      * Replaces the entry for a key only if currently mapped to a given value.
@@ -230,7 +233,7 @@ default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<?
      * @throws IllegalArgumentException if some property of a specified key
      *         or value prevents it from being stored in this map
      */
-    boolean replace(@Modifiable ConcurrentMap<K,V> this, K key, V oldValue, V newValue);
+    boolean replace(@Replaceable ConcurrentMap<K,V> this, K key, V oldValue, V newValue);
 
     /**
      * Replaces the entry for a key only if currently mapped to some value.
@@ -262,7 +265,7 @@ default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<?
      * @throws IllegalArgumentException if some property of the specified key
      *         or value prevents it from being stored in this map
      */
-    @Nullable V replace(@Modifiable ConcurrentMap<K,V> this, K key, V value);
+    @Nullable V replace(@Replaceable ConcurrentMap<K,V> this, K key, V value);
 
     /**
      * {@inheritDoc}
@@ -295,7 +298,7 @@ default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<?
      * @since 1.8
      */
     @Override
-    default void replaceAll(@Modifiable ConcurrentMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
+    default void replaceAll(@Replaceable ConcurrentMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         forEach((k,v) -> {
             while (!replace(k, v, function.apply(k, v))) {
@@ -335,7 +338,7 @@ default void replaceAll(@Modifiable ConcurrentMap<K,V> this, BiFunction<? super
      * @since 1.8
      */
     @Override
-    default @PolyNull V computeIfAbsent(@Modifiable ConcurrentMap<K,V> this, K key,
+    default @PolyNull V computeIfAbsent(@Growable ConcurrentMap<K,V> this, K key,
             Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V oldValue, newValue;
@@ -377,7 +380,7 @@ default void replaceAll(@Modifiable ConcurrentMap<K,V> this, BiFunction<? super
      * @since 1.8
      */
     @Override
-    default @PolyNull V computeIfPresent(@Modifiable ConcurrentMap<K,V> this, K key,
+    default @PolyNull V computeIfPresent(@ShrinkReplace ConcurrentMap<K,V> this, K key,
             BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         for (V oldValue; (oldValue = get(key)) != null; ) {

From 73e35cbe41b12acd9c48a2d72588d4adab48a4c6 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 16 Feb 2026 19:01:27 -0800
Subject: [PATCH 029/119] changed all @WillThrowUOE to @ThrowsUOE to match the
 checker

---
 .../share/classes/java/util/AbstractCollection.java         | 2 +-
 src/java.base/share/classes/java/util/SortedMap.java        | 6 +++---
 src/java.base/share/classes/java/util/SortedSet.java        | 6 +++---
 src/java.base/share/classes/java/util/TreeMap.java          | 6 +++---
 src/java.base/share/classes/java/util/TreeSet.java          | 6 +++---
 .../classes/java/util/concurrent/ConcurrentSkipListMap.java | 6 +++---
 .../classes/java/util/concurrent/ConcurrentSkipListSet.java | 6 +++---
 7 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index a91bb5e4ad57..59acf37dc335 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -36,7 +36,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index cd527454d7fb..1b468a3e4b77 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -316,7 +316,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
      default V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -332,7 +332,7 @@ default V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     default V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 94535ec80811..f185cbb43c26 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -27,7 +27,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.Pure;
@@ -293,7 +293,7 @@ public Comparator<? super E> getComparator() {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     default void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -309,7 +309,7 @@ default void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     default void addLast(E e) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index e0db302cd8d4..a96ecfff2bce 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -343,7 +343,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -356,7 +356,7 @@ public V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index d85b376976ab..7de89e07e5c1 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.GrowShrink;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -508,7 +508,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -521,7 +521,7 @@ public void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public void addLast(E e) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 03696ecca13f..0415aa110448 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -1906,7 +1906,7 @@ public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -1919,7 +1919,7 @@ public V putFirst(K k, V v) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 564ce540b275..8e81e599faf1 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.WillThrowUOE;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -440,7 +440,7 @@ public E last(@NonEmpty ConcurrentSkipListSet<E> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -453,7 +453,7 @@ public void addFirst(E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @WillThrowUOE
+    @ThrowsUOE
     public void addLast(E e) {
         throw new UnsupportedOperationException();
     }

From 60053fad9940808899c98ffbae07ac7c524acbce Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 19 Feb 2026 13:26:15 -0800
Subject: [PATCH 030/119] annotated Deque and ProcessBuilder for case study

---
 src/java.base/share/classes/java/lang/ProcessBuilder.java | 5 +++--
 src/java.base/share/classes/java/util/Deque.java          | 3 ++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/ProcessBuilder.java b/src/java.base/share/classes/java/lang/ProcessBuilder.java
index 8fbb26db26dd..5c9453402f29 100644
--- a/src/java.base/share/classes/java/lang/ProcessBuilder.java
+++ b/src/java.base/share/classes/java/lang/ProcessBuilder.java
@@ -25,6 +25,7 @@
 
 package java.lang;
 
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.mustcall.qual.MustCall;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.tainting.qual.Untainted;
@@ -199,7 +200,7 @@ public final class ProcessBuilder
     // Lazily and racy initialize when needed, racy is ok, any logger is ok
     private static System.Logger LOGGER;
 
-    private List<String> command;
+    @Modifiable private List<String> command;
     private File directory;
     private Map<String,String> environment;
     private boolean redirectErrorStream;
@@ -283,7 +284,7 @@ public ProcessBuilder command(@Untainted String... command) {
      *
      * @return this process builder's program and its arguments
      */
-    public List<@Untainted String> command() {
+    public @Modifiable List<@Untainted String> command() {
         return command;
     }
 
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index e2e8f3ed88d4..b4dc431e93af 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -40,6 +40,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.GrowShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -219,7 +220,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+public @GrowShrink interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,

From 08b94e1ee86f32afbf8ee1f064e457de01831b78 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 19 Feb 2026 16:33:10 -0800
Subject: [PATCH 031/119] edited the annotation to fit the 3 2-level hierarchy.

---
 .../share/classes/java/util/AbstractMap.java      |  7 ++++---
 .../share/classes/java/util/ArrayList.java        |  6 ++++--
 src/java.base/share/classes/java/util/Deque.java  |  5 +++--
 .../share/classes/java/util/HashSet.java          | 15 ++++++++-------
 src/java.base/share/classes/java/util/Map.java    |  8 +++-----
 src/java.base/share/classes/java/util/Queue.java  |  5 +++--
 .../share/classes/java/util/SequencedMap.java     |  7 ++++---
 .../share/classes/java/util/TreeSet.java          | 15 ++++++++-------
 .../java/util/concurrent/ConcurrentMap.java       |  4 ++--
 9 files changed, 39 insertions(+), 33 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index c78567322d81..02ba232f5fda 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -29,7 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.GrowReplace;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Replaceale;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
@@ -242,7 +243,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      */
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GrowReplace @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
         throw new UnsupportedOperationException();
     }
 
@@ -313,7 +314,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public void putAll(@GrowReplace @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
     }
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 750209d0f6d5..b6beb582e247 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -32,7 +32,9 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.BottomModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -133,7 +135,7 @@
  */
 @CFComment("lock/nullness: Permit null elements")
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class ArrayList<E> extends AbstractList<E>
+public @Growable @Shrinkable @Replaceable class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
     @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index b4dc431e93af..20bfea32aad5 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -40,7 +40,8 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.GrowShrink;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -220,7 +221,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public @GrowShrink interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+public @Growabel @Shrinkable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 018be7ccf6fe..3695d763c571 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -28,7 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.GrowShrink;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -105,7 +106,7 @@
  */
 
 @AnnotatedFor({"lock", "nullness", "index"})
-public @GrowShrink class HashSet<E>
+public @Growable @Shrinkable class HashSet<E>
     extends AbstractSet<E>
     implements Set<E>, Cloneable, java.io.Serializable
 {
@@ -121,7 +122,7 @@
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @GrowShrink HashSet() {
+    public HashSet() {
         map = new HashMap<>();
     }
 
@@ -134,7 +135,7 @@
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @GrowShrink @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -152,7 +153,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @GrowShrink HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -168,7 +169,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @GrowShrink HashSet(@NonNegative int initialCapacity) {
+    public HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -185,7 +186,7 @@
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @GrowShrink HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index cb00587d024c..84f4e94c5127 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -33,8 +33,6 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.GrowReplace;
-import org.checkerframework.checker.modifiability.qual.ShrinkReplace;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -311,7 +309,7 @@ public interface Map<K, V> {
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @EnsuresNonEmpty("this")
-    @Nullable V put(@GrowReplace @GuardSatisfied Map<K, V> this, K key, V value);
+    @Nullable V put(@Growable @Replaceable @GuardSatisfied Map<K, V> this, K key, V value);
 
     /**
      * Removes the mapping for a key from this map if it is present
@@ -368,7 +366,7 @@ public interface Map<K, V> {
      * @throws IllegalArgumentException if some property of a key or value in
      *         the specified map prevents it from being stored in this map
      */
-    void putAll(@GrowReplace @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
+    void putAll(@Growable @Replaceable @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
 
     /**
      * Removes all of the mappings from this map (optional operation).
@@ -1196,7 +1194,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
-    default @Nullable V computeIfPresent(@ShrinkReplace Map<K, V> this, K key,
+    default @Nullable V computeIfPresent(@Shrinkable @Replaceable Map<K, V> this, K key,
             BiFunction<? super K, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V oldValue;
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index cc485f39ea81..f0d6042647f0 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -37,7 +37,8 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.GrowShrink;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -148,7 +149,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @GrowShrink interface Queue<E> extends Collection<E> {
+public @Growable @Shrinkable interface Queue<E> extends Collection<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do so
      * immediately without violating capacity restrictions, returning
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 6fa7527fd60d..939a7bd2dbab 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -27,7 +27,8 @@
 
 import jdk.internal.util.NullableKeyValueHolder;
 
-import org.checkerframework.checker.modifiability.qual.GrowReplace;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 
 /**
@@ -238,7 +239,7 @@ default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putFirst(@GrowReplace SequencedMap<K,V> this, K k, V v) {
+    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -257,7 +258,7 @@ default V putFirst(@GrowReplace SequencedMap<K,V> this, K k, V v) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
-    default V putLast(@GrowReplace SequencedMap<K,V> this, K k, V v) {
+    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 7de89e07e5c1..997cf849f7aa 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -28,7 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.GrowShrink;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -112,13 +113,13 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @GrowShrink class TreeSet<E> extends AbstractSet<E>
+public @Growable @Shrinkable class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**
      * The backing map.
      */
-    private transient @GrowShrink NavigableMap<E,Object> m;
+    private transient @Growable @Shrinkable NavigableMap<E,Object> m;
 
     // Dummy value to associate with an Object in the backing Map
     private static final Object PRESENT = new Object();
@@ -143,7 +144,7 @@
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @GrowShrink TreeSet() {
+    public TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -160,7 +161,7 @@
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @GrowShrink TreeSet(@Nullable Comparator<? super E> comparator) {
+    public TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -178,7 +179,7 @@
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @GrowShrink @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -190,7 +191,7 @@
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @GrowShrink @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 2677b4aedca4..82451837df80 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
-import org.checkerframework.checker.modifiability.qual.ShrinkReplace;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -380,7 +380,7 @@ default void replaceAll(@Replaceable ConcurrentMap<K,V> this, BiFunction<? super
      * @since 1.8
      */
     @Override
-    default @PolyNull V computeIfPresent(@ShrinkReplace ConcurrentMap<K,V> this, K key,
+    default @PolyNull V computeIfPresent(@Shrinkable @Replaceable ConcurrentMap<K,V> this, K key,
             BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         for (V oldValue; (oldValue = get(key)) != null; ) {

From b374a18b772b36b7fdbc0c6fa37c6cdd23128d48 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 22 Feb 2026 20:33:33 -0800
Subject: [PATCH 032/119] finished annotating polyShrink

---
 .../share/classes/java/util/AbstractMap.java       |  8 +++++---
 src/java.base/share/classes/java/util/HashMap.java |  8 +++++---
 .../share/classes/java/util/Hashtable.java         |  8 +++++---
 .../share/classes/java/util/IdentityHashMap.java   |  8 +++++---
 .../share/classes/java/util/LinkedHashMap.java     | 14 ++++++++------
 src/java.base/share/classes/java/util/Map.java     |  7 ++++---
 .../share/classes/java/util/NavigableMap.java      |  5 +++--
 .../share/classes/java/util/SequencedMap.java      |  8 +++++---
 .../share/classes/java/util/SortedMap.java         |  7 ++++---
 src/java.base/share/classes/java/util/TreeMap.java | 12 +++++++-----
 .../share/classes/java/util/WeakHashMap.java       |  8 +++++---
 .../java/util/concurrent/ConcurrentHashMap.java    |  6 ++++--
 .../util/concurrent/ConcurrentNavigableMap.java    |  7 ++++---
 .../util/concurrent/ConcurrentSkipListMap.java     | 11 ++++++-----
 14 files changed, 70 insertions(+), 47 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 02ba232f5fda..38364b4bc078 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -32,6 +32,8 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceale;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -382,7 +384,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied AbstractMap<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -449,7 +451,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    public Collection<V> values(@GuardSatisfied AbstractMap<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -500,7 +502,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    public abstract Set<Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied AbstractMap<K, V> this);
+    public abstract @PolyShrink Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 02cff3d42106..da1aa1e5848f 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -30,6 +30,8 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -940,7 +942,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1074,7 +1076,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public Collection<V> values(@GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1138,7 +1140,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index ea3062654645..cad83ff4f55d 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,6 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -691,7 +693,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -736,7 +738,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -821,7 +823,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public Collection<V> values(@GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index b249b8f1be58..25f0da0c35f3 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,6 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -1016,7 +1018,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1130,7 +1132,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    public Collection<V> values(@GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1245,7 +1247,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 8a88fc64f64b..73c9a67b82bd 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,6 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -644,7 +646,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet() {
+    public @PolyShrink Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -657,7 +659,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return {@inheritDoc}
      * @since 21
      */
-    public SequencedSet<K> sequencedKeySet() {
+    public @PolyShrink SequencedSet<K> sequencedKeySet(@PolyShrink LinkedHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             SequencedSet<K> sks = new LinkedKeySet(false);
@@ -798,7 +800,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    public Collection<V> values() {
+    public @PolyShrink Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -811,7 +813,7 @@ public Collection<V> values() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public SequencedCollection<V> sequencedValues() {
+    public @PolyShrink SequencedCollection<V> sequencedValues(@PolyShrink LinkedHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             SequencedCollection<V> svs = new LinkedValues(false);
@@ -909,7 +911,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied LinkedHashMap<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -922,7 +924,7 @@ public SequencedCollection<V> reversed() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public SequencedSet<Map.Entry<K, V>> sequencedEntrySet() {
+    public @PolyShrink SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable LinkedHashMap<K, V> this) {
         Set<Map.Entry<K, V>> es = entrySet;
         if (es == null) {
             SequencedSet<Map.Entry<K, V>> ses = new LinkedEntrySet(false);
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 84f4e94c5127..1600c0c611e1 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -35,6 +35,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -396,7 +397,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @PolyModifiable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -414,7 +415,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @PolyModifiable @PolyNonEmpty Collection<V> values(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -433,7 +434,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @PolyModifiable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 13a51e210e14..e110fe69db53 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -297,7 +298,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    NavigableSet<@KeyFor({"this"}) K> navigableKeySet();
+    @PolyShrink NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -314,7 +315,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    NavigableSet<@KeyFor({"this"}) K> descendingKeySet();
+    @PolyShrink NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 939a7bd2dbab..8a1f25ebc733 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -30,6 +30,8 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 
 /**
  * A Map that has a well-defined encounter order, that supports operations at both ends, and
@@ -276,7 +278,7 @@ default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
      *
      * @return a {@code SequencedSet} view of this map's {@code keySet}
      */
-    default SequencedSet<K> sequencedKeySet() {
+    default @PolyShrink SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {
         class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
             Collection<K> view() {
                 return SequencedMap.this.keySet();
@@ -309,7 +311,7 @@ public int hashCode() {
      *
      * @return a {@code SequencedCollection} view of this map's {@code values} collection
      */
-    default SequencedCollection<V> sequencedValues() {
+    default @PolyShrink SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {
         class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
             Collection<V> view() {
                 return SequencedMap.this.values();
@@ -335,7 +337,7 @@ public SequencedCollection<V> reversed() {
      *
      * @return a {@code SequencedSet} view of this map's {@code entrySet}
      */
-    default SequencedSet<Map.Entry<K, V>> sequencedEntrySet() {
+    default @PolyShrink SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
         class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
                 implements SequencedSet<Map.Entry<K, V>> {
             Collection<Map.Entry<K, V>> view() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 1b468a3e4b77..4958e5a52acf 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -261,7 +262,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -282,7 +283,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    Collection<V> values(@GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -303,7 +304,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    Set<Map.Entry<@KeyFor({"this"}) K, V>> entrySet(@GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index a96ecfff2bce..11b518caa35e 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -29,6 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -1154,7 +1156,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
      * operations.  It does not support the {@code add} or {@code addAll}
      * operations.
      */
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1162,7 +1164,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1171,7 +1173,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1196,7 +1198,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    public Collection<V> values(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1228,7 +1230,7 @@ public Collection<V> values(@GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index caf82fb03918..b83c3e67abac 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,6 +28,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -904,7 +906,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    public Set<@KeyFor({"this"}) K> keySet(@GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -963,7 +965,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public Collection<V> values(@GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1014,7 +1016,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index b7c667428d5a..7985c8ce046c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -38,6 +38,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -1288,7 +1290,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    public Collection<V> values() {
+    public @PolyShrink Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1312,7 +1314,7 @@ public Collection<V> values() {
      * @return the set view
      */
     @SideEffectFree
-    public Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet() {
+    public @PolyShrink Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index fe8eb9969bd0..cd3d406c2bfd 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -36,6 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
 import java.util.NavigableMap;
@@ -144,7 +145,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    NavigableSet<K> navigableKeySet();
+    @PolyShrink NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -164,7 +165,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    NavigableSet<K> keySet();
+    @PolyShrink NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -183,5 +184,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    NavigableSet<K> descendingKeySet();
+    @PolyShrink NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 0415aa110448..062343c89d66 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@@ -1632,14 +1633,14 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    public NavigableSet<K> keySet() {
+    public @PolyShrink NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    public NavigableSet<K> navigableKeySet() {
+    public @PolyShrink NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1664,7 +1665,7 @@ public NavigableSet<K> navigableKeySet() {
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    public Collection<V> values() {
+    public @PolyShrink Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1698,7 +1699,7 @@ public Collection<V> values() {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public Set<Map.@Unmodifiable Entry<K,V>> entrySet() {
+    public @PolyShrink Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1713,7 +1714,7 @@ public ConcurrentNavigableMap<K,V> descendingMap() {
     }
 
     @SideEffectFree
-    public NavigableSet<K> descendingKeySet() {
+    public @PolyShrink NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 

From d0b16ee233948f7f7104c6f41d38ee129c21bda6 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Mon, 23 Feb 2026 00:58:11 -0800
Subject: [PATCH 033/119] fixed typo in annotation

---
 src/java.base/share/classes/java/util/ArrayList.java | 2 +-
 src/java.base/share/classes/java/util/Deque.java     | 2 +-
 src/java.base/share/classes/java/util/Iterator.java  | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index b6beb582e247..bf2fdcdad5c7 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -135,7 +135,7 @@
  */
 @CFComment("lock/nullness: Permit null elements")
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Growable @Shrinkable @Replaceable class ArrayList<E> extends AbstractList<E>
+public @Modifiable class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
     @java.io.Serial
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 20bfea32aad5..eca294ff0c7d 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -221,7 +221,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Growabel @Shrinkable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+public @Growable @Shrinkable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index 60c3a5d7110f..1d8786ebe8dc 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -27,7 +27,7 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -117,7 +117,7 @@ public interface Iterator<E> {
      *         been called after the last call to the {@code next}
      *         method
      */
-    default void remove(@Modifiable @GuardSatisfied @CanShrink Iterator<E> this) {
+    default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {
         throw new UnsupportedOperationException("remove");
     }
 

From d4fccb28438f16fdf8905b530ed38c0dd075526c Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Tue, 24 Feb 2026 23:02:57 -0800
Subject: [PATCH 034/119] added the annotation for list iterator.

---
 .../share/classes/java/util/ListIterator.java          | 10 ++++++----
 src/java.base/share/classes/java/util/TreeSet.java     |  1 +
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ListIterator.java b/src/java.base/share/classes/java/util/ListIterator.java
index ae50030ca9ce..098b51abaa26 100644
--- a/src/java.base/share/classes/java/util/ListIterator.java
+++ b/src/java.base/share/classes/java/util/ListIterator.java
@@ -28,7 +28,9 @@
 import org.checkerframework.checker.index.qual.GTENegativeOne;
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -167,7 +169,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
-    void remove(@Modifiable @GuardSatisfied ListIterator<E> this);
+    void remove(@Shrinkable @GuardSatisfied ListIterator<E> this);
 
     /**
      * Replaces the last element returned by {@link #next} or
@@ -189,7 +191,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
-    void set(@Modifiable @GuardSatisfied ListIterator<E> this, E e);
+    void set(@Replaceable @GuardSatisfied ListIterator<E> this, E e);
 
     /**
      * Inserts the specified element into the list (optional operation).
@@ -211,5 +213,5 @@ public interface ListIterator<E> extends Iterator<E> {
      * @throws IllegalArgumentException if some aspect of this element
      *         prevents it from being added to this list
      */
-    void add(@Modifiable @GuardSatisfied ListIterator<E> this, E e);
+    void add(@Growable @GuardSatisfied ListIterator<E> this, E e);
 }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 997cf849f7aa..d96a0455b417 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;

From a1507ee61aa0d2e9e0ca906eb371627d829247ab Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Wed, 25 Feb 2026 23:57:16 -0800
Subject: [PATCH 035/119] change deque, queue, hashset, and treeset back to mod

---
 src/java.base/share/classes/java/util/Deque.java   | 2 +-
 src/java.base/share/classes/java/util/HashSet.java | 3 ++-
 src/java.base/share/classes/java/util/Queue.java   | 3 ++-
 src/java.base/share/classes/java/util/TreeSet.java | 2 +-
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index eca294ff0c7d..196cf0d9a010 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -221,7 +221,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Growable @Shrinkable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+public @Modifiable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 3695d763c571..259f0d7802d7 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -106,7 +107,7 @@
  */
 
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Growable @Shrinkable class HashSet<E>
+public @Modifiable class HashSet<E>
     extends AbstractSet<E>
     implements Set<E>, Cloneable, java.io.Serializable
 {
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index f0d6042647f0..aa7b3a2a2198 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -149,7 +150,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @Growable @Shrinkable interface Queue<E> extends Collection<E> {
+public @Modifiable interface Queue<E> extends Collection<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do so
      * immediately without violating capacity restrictions, returning
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index d96a0455b417..51f5cf3c6491 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -114,7 +114,7 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public @Growable @Shrinkable class TreeSet<E> extends AbstractSet<E>
+public @Modifiable class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**

From e804103db2e9b3da87c0acdd367aff5f67edf26c Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sat, 14 Mar 2026 16:50:59 -0700
Subject: [PATCH 036/119] temp commit, trying to figuer out why gradlew
 assemble for checker framework is too slow.

---
 .../share/classes/java/lang/Iterable.java     |  4 +-
 .../classes/java/util/AbstractCollection.java |  2 +-
 .../share/classes/java/util/ArrayList.java    | 38 +++++++++----------
 .../share/classes/java/util/Collection.java   |  2 +-
 .../share/classes/java/util/HashMap.java      | 21 +++++-----
 .../classes/java/util/IdentityHashMap.java    |  2 +-
 .../classes/java/util/LinkedHashMap.java      | 10 ++---
 .../share/classes/java/util/Set.java          |  2 +-
 8 files changed, 41 insertions(+), 40 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/Iterable.java b/src/java.base/share/classes/java/lang/Iterable.java
index 72ae4ad6bc07..25b8ac62b59d 100644
--- a/src/java.base/share/classes/java/lang/Iterable.java
+++ b/src/java.base/share/classes/java/lang/Iterable.java
@@ -25,7 +25,7 @@
 package java.lang;
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -52,7 +52,7 @@ public interface Iterable<T> {
      *
      * @return an Iterator.
      */
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterable<T> this);
+    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterable<T> this);
 
     /**
      * Performs the given action for each element of the {@code Iterable}
diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 59acf37dc335..e95aa874bd39 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -104,7 +104,7 @@ protected AbstractCollection() {
      * @return an iterator over the elements contained in this collection
      */
     @SideEffectFree
-    public abstract @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
+    public abstract @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
     @Pure
     public abstract @NonNegative int size(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this);
 
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index bf2fdcdad5c7..5c510d51a77e 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -135,7 +135,7 @@
  */
 @CFComment("lock/nullness: Permit null elements")
 @AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class ArrayList<E> extends AbstractList<E>
+public class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
     @java.io.Serial
@@ -510,7 +510,7 @@ public E getLast() {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @SideEffectsOnly("this")
-    public E set(@GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
+    public E set(@Replaceable @GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
         Objects.checkIndex(index, size);
         E oldValue = elementData(index);
         elementData[index] = element;
@@ -538,7 +538,7 @@ private void add(E e, Object[] elementData, int s) {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied ArrayList<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
         modCount++;
         add(e, elementData, size);
         return true;
@@ -554,7 +554,7 @@ public boolean add(@GuardSatisfied ArrayList<E> this, E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @SideEffectsOnly("this")
-    public void add(@GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
+    public void add(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
         rangeCheckForAdd(index);
         modCount++;
         final int s;
@@ -573,7 +573,7 @@ public void add(@GuardSatisfied ArrayList<E> this, @NonNegative int index, E ele
      *
      * @since 21
      */
-    public void addFirst(E element) {
+    public void addFirst(@Growable ArrayList<E> this, E element) {
         add(0, element);
     }
 
@@ -582,7 +582,7 @@ public void addFirst(E element) {
      *
      * @since 21
      */
-    public void addLast(E element) {
+    public void addLast(@Growable ArrayList<E> this, E element) {
         add(element);
     }
 
@@ -595,7 +595,7 @@ public void addLast(E element) {
      * @return the element that was removed from the list
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int index) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int index) {
         Objects.checkIndex(index, size);
         final Object[] es = elementData;
 
@@ -611,7 +611,7 @@ public E remove(@GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int i
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeFirst() {
+    public E removeFirst(@Shrinkable ArrayList<E> this) {
         if (size == 0) {
             throw new NoSuchElementException();
         } else {
@@ -628,7 +628,7 @@ public E removeFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeLast() {
+    public E removeLast(@Shrinkable ArrayList<E> this) {
         int last = size - 1;
         if (last < 0) {
             throw new NoSuchElementException();
@@ -742,7 +742,7 @@ int hashCodeRange(int from, int to) {
      * @param o element to be removed from this list, if present
      * @return {@code true} if this list contained the specified element
      */
-    public boolean remove(@GuardSatisfied @CanShrink ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         final Object[] es = elementData;
         final int size = this.size;
         int i = 0;
@@ -778,7 +778,7 @@ private void fastRemove(Object[] es, int i) {
      * Removes all of the elements from this list.  The list will
      * be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink ArrayList<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this) {
         modCount++;
         final Object[] es = elementData;
         for (int to = size, i = size = 0; i < to; i++)
@@ -799,7 +799,7 @@ public void clear(@GuardSatisfied @CanShrink ArrayList<E> this) {
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectsOnly("this")
-    public boolean addAll(@GuardSatisfied ArrayList<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, Collection<? extends E> c) {
         Object[] a = c.toArray();
         modCount++;
         int numNew = a.length;
@@ -830,7 +830,7 @@ public boolean addAll(@GuardSatisfied ArrayList<E> this, Collection<? extends E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectsOnly("this")
-    public boolean addAll(@GuardSatisfied ArrayList<E> this, @NonNegative int index, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, Collection<? extends E> c) {
         rangeCheckForAdd(index);
 
         Object[] a = c.toArray();
@@ -866,7 +866,7 @@ public boolean addAll(@GuardSatisfied ArrayList<E> this, @NonNegative int index,
      *          toIndex > size() ||
      *          toIndex < fromIndex})
      */
-    protected void removeRange(@GuardSatisfied @CanShrink ArrayList<E> this, int fromIndex, int toIndex) {
+    protected void removeRange(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, int fromIndex, int toIndex) {
         if (fromIndex > toIndex) {
             throw new IndexOutOfBoundsException(
                     outOfBoundsMsg(fromIndex, toIndex));
@@ -921,7 +921,7 @@ private static String outOfBoundsMsg(int fromIndex, int toIndex) {
      *         or if the specified collection is null
      * @see Collection#contains(Object)
      */
-    public boolean removeAll(@CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return batchRemove(c, false, 0, size);
     }
 
@@ -941,7 +941,7 @@ public boolean removeAll(@CanShrink ArrayList<E> this, Collection<? extends @Unk
      *         or if the specified collection is null
      * @see Collection#contains(Object)
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return batchRemove(c, true, 0, size);
     }
 
@@ -1053,7 +1053,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink ArrayList<E> this, @NonNegative int index) {
+    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this, @NonNegative int index) {
         rangeCheckForAdd(index);
         return new ListItr(index);
     }
@@ -1066,7 +1066,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty ArrayList<E> this) {
+    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this) {
         return new ListItr(0);
     }
 
@@ -1078,7 +1078,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ArrayList<E> this) {
+    public @PolyModifiable @PolyGrowShrink Iterator<E> iterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this) {
         return new Itr();
     }
 
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 81e1951c2ad7..bbe27d23ad7d 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -334,7 +334,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return an {@code Iterator} over the elements in this collection
      */
     @SideEffectFree
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> this);
+    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Collection<E> this);
 
     /**
      * Returns an array containing all of the elements in this collection.
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index da1aa1e5848f..74dbfde388e9 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
@@ -1019,12 +1020,12 @@ <T> T[] valuesToArray(T[] a) {
         return a;
     }
 
-    final class KeySet extends AbstractSet<K> {
+    final @Shrinkable class KeySet extends AbstractSet<K> {
         @Pure
         public final @NonNegative int size()                 { return size; }
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
-        public final Iterator<K> iterator()     { return new KeyIterator(); }
+        public final @Modifiable Iterator<K> iterator()     { return new KeyIterator(); }
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public final boolean contains(@Nullable @UnknownSignedness Object o) { return containsKey(o); }
@@ -1085,12 +1086,12 @@ public final void forEach(Consumer<? super K> action) {
         return vs;
     }
 
-    final class Values extends AbstractCollection<V> {
+    final @Shrinkable class Values extends AbstractCollection<V> {
         @Pure
         public final @NonNegative int size()                 { return size; }
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
-        public final Iterator<V> iterator()     { return new ValueIterator(); }
+        public final @Modifiable Iterator<V> iterator()     { return new ValueIterator(); }
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public final boolean contains(@Nullable @UnknownSignedness Object o) { return containsValue(o); }
@@ -1145,12 +1146,12 @@ public final void forEach(Consumer<? super V> action) {
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
 
-    final class EntrySet extends AbstractSet<Map.Entry<K,V>> {
+    final @Shrinkable class EntrySet extends AbstractSet<Map.Entry<K,V>> {
         @Pure
         public final @NonNegative int size()                 { return size; }
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
-        public final Iterator<Map.Entry<K,V>> iterator() {
+        public final @Modifiable Iterator<Map.Entry<K,V>> iterator() {
             return new EntryIterator();
         }
         @Pure
@@ -1632,7 +1633,7 @@ static void putLoadFactor(HashMap<?, ?> map, float lf) {
     /* ------------------------------------------------------------ */
     // iterators
 
-    abstract class HashIterator {
+    abstract @Modifiable class HashIterator {
         Node<K,V> next;        // next entry to return
         Node<K,V> current;     // current entry
         int expectedModCount;  // for fast-fail
@@ -1680,17 +1681,17 @@ public final void remove() {
         }
     }
 
-    final class KeyIterator extends HashIterator
+    final @Modifiable class KeyIterator extends HashIterator
         implements Iterator<K> {
         public final K next(@NonEmpty KeyIterator this) { return nextNode().key; }
     }
 
-    final class ValueIterator extends HashIterator
+    final @Modifiable class ValueIterator extends HashIterator
         implements Iterator<V> {
         public final V next(@NonEmpty ValueIterator this) { return nextNode().value; }
     }
 
-    final class EntryIterator extends HashIterator
+    final @Modifiable class EntryIterator extends HashIterator
         implements Iterator<Map.Entry<K,V>> {
         public final Map.Entry<K,V> next(@NonEmpty EntryIterator this) { return nextNode(); }
     }
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 25f0da0c35f3..6273126ef957 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -1247,7 +1247,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 73c9a67b82bd..d42224add3a4 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -720,7 +720,7 @@ final class LinkedKeySet extends AbstractSet<K> implements SequencedSet<K> {
         public final int size()                 { return size; }
         public final void clear()               { LinkedHashMap.this.clear(); }
         @SideEffectFree
-        public final Iterator<K> iterator() {
+        public final @Modifiable Iterator<K> iterator() {
             return new LinkedKeyIterator(reversed);
         }
         @Pure
@@ -1038,7 +1038,7 @@ public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
 
     // Iterators
 
-    abstract class LinkedHashIterator {
+    abstract @Modifiable class LinkedHashIterator {
         LinkedHashMap.Entry<K,V> next;
         LinkedHashMap.Entry<K,V> current;
         int expectedModCount;
@@ -1081,19 +1081,19 @@ public final void remove() {
         }
     }
 
-    final class LinkedKeyIterator extends LinkedHashIterator
+    final @Modifiable class LinkedKeyIterator extends LinkedHashIterator
         implements Iterator<K> {
         LinkedKeyIterator(boolean reversed) { super(reversed); }
         public final K next(@NonEmpty LinkedKeyIterator this) { return nextNode().getKey(); }
     }
 
-    final class LinkedValueIterator extends LinkedHashIterator
+    final @Modifiable class LinkedValueIterator extends LinkedHashIterator
         implements Iterator<V> {
         LinkedValueIterator(boolean reversed) { super(reversed); }
         public final V next(@NonEmpty LinkedValueIterator this) { return nextNode().value; }
     }
 
-    final class LinkedEntryIterator extends LinkedHashIterator
+    final @Modifiable class LinkedEntryIterator extends LinkedHashIterator
         implements Iterator<Map.Entry<K,V>> {
         LinkedEntryIterator(boolean reversed) { super(reversed); }
         public final Map.Entry<K,V> next(@NonEmpty LinkedEntryIterator this) { return nextNode(); }
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 31a2db1c96a7..888f6f5e64b2 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -184,7 +184,7 @@ public interface Set<E> extends Collection<E> {
      * @return an iterator over the elements in this set
      */
     @SideEffectFree
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Set<E> this);
+    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Set<E> this);
 
     /**
      * Returns an array containing all of the elements in this set.

From 94b7f64d9d93586d62bb677302e0369d3c6f2e55 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Thu, 19 Mar 2026 01:00:09 -0700
Subject: [PATCH 037/119] partially done with remove class annotation and
 annotate the entire class.

---
 .../share/classes/java/util/ArrayList.java    | 16 +++---
 .../share/classes/java/util/HashSet.java      | 25 +++++----
 .../share/classes/java/util/Hashtable.java    | 43 +++++++-------
 .../classes/java/util/LinkedHashSet.java      | 24 ++++----
 .../share/classes/java/util/TreeSet.java      | 47 ++++++++--------
 .../share/classes/java/util/Vector.java       | 56 ++++++++++---------
 .../concurrent/ConcurrentSkipListSet.java     | 30 +++++-----
 7 files changed, 128 insertions(+), 113 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 5c510d51a77e..95dde7c1a067 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -30,12 +30,10 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -134,7 +132,7 @@
  * @since   1.2
  */
 @CFComment("lock/nullness: Permit null elements")
-@AnnotatedFor({"lock", "nullness", "index"})
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
 public class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
@@ -1243,7 +1241,7 @@ public void add(E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyGrowShrink List<E> subList(@GuardSatisfied @PolyGrowShrink ArrayList<E> this, @NonNegative int fromIndex, @NonNegative int toIndex) {
+    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink ArrayList<E> this, @NonNegative int fromIndex, @NonNegative int toIndex) {
         subListRangeCheck(fromIndex, toIndex, size);
         return new SubList<>(this, fromIndex, toIndex);
     }
@@ -1803,7 +1801,7 @@ private static boolean isClear(long[] bits, int i) {
      * @throws NullPointerException {@inheritDoc}
      */
     @Override
-    public boolean removeIf(@CanShrink ArrayList<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E> filter) {
         return removeIf(filter, 0, size);
     }
 
@@ -1811,7 +1809,7 @@ public boolean removeIf(@CanShrink ArrayList<E> this, Predicate<? super E> filte
      * Removes all elements satisfying the given predicate, from index
      * i (inclusive) to index end (exclusive).
      */
-    boolean removeIf(@CanShrink ArrayList<E> this, Predicate<? super E> filter, int i, final int end) {
+    boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E> filter, int i, final int end) {
         Objects.requireNonNull(filter);
         int expectedModCount = modCount;
         final Object[] es = elementData;
@@ -1846,13 +1844,13 @@ boolean removeIf(@CanShrink ArrayList<E> this, Predicate<? super E> filter, int
 
     @SuppressWarnings({"unchecked"})
     @Override
-    public void replaceAll(UnaryOperator<E> operator) {
+    public void replaceAll(@Replaceable ArrayList<E> this, UnaryOperator<E> operator) {
         replaceAllRange(operator, 0, size);
         // TODO(8203662): remove increment of modCount from ...
         modCount++;
     }
 
-    private void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
+    private void replaceAllRange(@Replaceable ArrayList<E> this, UnaryOperator<E> operator, int i, int end) {
         Objects.requireNonNull(operator);
         final int expectedModCount = modCount;
         final Object[] es = elementData;
@@ -1864,7 +1862,7 @@ private void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
 
     @Override
     @SuppressWarnings("unchecked")
-    public void sort(Comparator<? super E> c) {
+    public void sort(@Replaceable ArrayList<E> this, Comparator<? super E> c) {
         final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, size, c);
         if (modCount != expectedModCount)
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 259f0d7802d7..9069c6bf4c4f 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -30,7 +30,10 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -106,8 +109,8 @@
  * @since   1.2
  */
 
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class HashSet<E>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class HashSet<E>
     extends AbstractSet<E>
     implements Set<E>, Cloneable, java.io.Serializable
 {
@@ -123,7 +126,7 @@
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public HashSet() {
+    public @Modifiable HashSet() {
         map = new HashMap<>();
     }
 
@@ -136,7 +139,7 @@ public HashSet() {
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -154,7 +157,7 @@ public HashSet() {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -170,7 +173,7 @@ public HashSet(@NonNegative int initialCapacity, float loadFactor) {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -187,7 +190,7 @@ public HashSet(@NonNegative int initialCapacity) {
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -199,7 +202,7 @@ public HashSet(@NonNegative int initialCapacity) {
      * @see ConcurrentModificationException
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty HashSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty HashSet<E> this) {
         return map.keySet().iterator();
     }
 
@@ -253,7 +256,7 @@ public boolean contains(@GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullab
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied HashSet<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied HashSet<E> this, E e) {
         return map.put(e, PRESENT)==null;
     }
 
@@ -270,7 +273,7 @@ public boolean add(@GuardSatisfied HashSet<E> this, E e) {
      * @return {@code true} if the set contained the specified element
      */
     @SideEffectsOnly("this")
-    public boolean remove(@GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return map.remove(o)==PRESENT;
     }
 
@@ -279,7 +282,7 @@ public boolean remove(@GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullable
      * The set will be empty after this call returns.
      */
     @SideEffectsOnly("this")
-    public void clear(@GuardSatisfied HashSet<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
         map.clear();
     }
 
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index cad83ff4f55d..9f8470fafb3f 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -27,9 +27,12 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -154,8 +157,8 @@
  * @since 1.0
  */
 @CFComment({"lock: This collection can only contain nonnull values"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class Hashtable<K extends @NonNull Object,V extends @NonNull Object>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class Hashtable<K extends @NonNull Object,V extends @NonNull Object>
     extends Dictionary<K,V>
     implements Map<K,V>, Cloneable, java.io.Serializable {
 
@@ -206,7 +209,7 @@
      * @throws     IllegalArgumentException  if the initial capacity is less
      *             than zero, or if the load factor is nonpositive.
      */
-    public Hashtable(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable Hashtable(@NonNegative int initialCapacity, float loadFactor) {
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
                                                initialCapacity);
@@ -228,7 +231,7 @@ public Hashtable(@NonNegative int initialCapacity, float loadFactor) {
      * @throws    IllegalArgumentException if the initial capacity is less
      *              than zero.
      */
-    public Hashtable(@NonNegative int initialCapacity) {
+    public @Modifiable Hashtable(@NonNegative int initialCapacity) {
         this(initialCapacity, 0.75f);
     }
 
@@ -236,7 +239,7 @@ public Hashtable(@NonNegative int initialCapacity) {
      * Constructs a new, empty hashtable with a default initial capacity (11)
      * and load factor (0.75).
      */
-    public Hashtable() {
+    public @Modifiable Hashtable() {
         this(11, 0.75f);
     }
 
@@ -249,7 +252,7 @@ public Hashtable() {
      * @throws NullPointerException if the specified map is null.
      * @since   1.2
      */
-    public Hashtable(Map<? extends K, ? extends V> t) {
+    public @Modifiable Hashtable(Map<? extends K, ? extends V> t) {
         this(Math.max(2*t.size(), 11), 0.75f);
         putAll(t);
     }
@@ -260,7 +263,7 @@ public Hashtable(Map<? extends K, ? extends V> t) {
      *
      * @param dummy a dummy parameter
      */
-    Hashtable(Void dummy) {}
+    @Modifiable Hashtable(Void dummy) {}
 
     /**
      * Returns the number of keys in this hashtable.
@@ -503,7 +506,7 @@ private void addEntry(int hash, K key, V value, int index) {
      * @see     #get(Object)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public synchronized @Nullable V put(@GuardSatisfied Hashtable<K, V> this, K key, V value) {
+    public synchronized @Nullable V put(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, K key, V value) {
         // Make sure the value is not null
         if (value == null) {
             throw new NullPointerException();
@@ -536,7 +539,7 @@ private void addEntry(int hash, K key, V value, int index) {
      *          or {@code null} if the key did not have a mapping
      * @throws  NullPointerException  if the key is {@code null}
      */
-    public synchronized @Nullable V remove(@GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
         int index = (hash & 0x7FFFFFFF) % tab.length;
@@ -568,7 +571,7 @@ private void addEntry(int hash, K key, V value, int index) {
      * @throws NullPointerException if the specified map is null
      * @since 1.2
      */
-    public synchronized void putAll(@GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {
+    public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {
         for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
             put(e.getKey(), e.getValue());
     }
@@ -576,7 +579,7 @@ public synchronized void putAll(@GuardSatisfied Hashtable<K, V> this, Map<? exte
     /**
      * Clears this hashtable so that it contains no keys.
      */
-    public synchronized void clear(@GuardSatisfied Hashtable<K, V> this) {
+    public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {
         Entry<?,?> tab[] = table;
         for (int index = tab.length; --index >= 0; )
             tab[index] = null;
@@ -955,7 +958,7 @@ public synchronized void forEach(BiConsumer<? super K, ? super V> action) {
 
     @SuppressWarnings("unchecked")
     @Override
-    public synchronized void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);     // explicit check required in case
                                               // table is empty.
         final int expectedModCount = modCount;
@@ -976,7 +979,7 @@ public synchronized void replaceAll(BiFunction<? super K, ? super V, ? extends V
 
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @Override
-    public synchronized V putIfAbsent(K key, V value) {
+    public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {
         Objects.requireNonNull(value);
 
         // Makes sure the key is not already in the hashtable.
@@ -1000,7 +1003,7 @@ public synchronized V putIfAbsent(K key, V value) {
     }
 
     @Override
-    public synchronized boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+    public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         Objects.requireNonNull(value);
 
         Entry<?,?> tab[] = table;
@@ -1025,7 +1028,7 @@ public synchronized boolean remove(@GuardSatisfied @UnknownSignedness Object key
     }
 
     @Override
-    public synchronized boolean replace(K key, V oldValue, V newValue) {
+    public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {
         Objects.requireNonNull(oldValue);
         Objects.requireNonNull(newValue);
         Entry<?,?> tab[] = table;
@@ -1047,7 +1050,7 @@ public synchronized boolean replace(K key, V oldValue, V newValue) {
     }
 
     @Override
-    public synchronized V replace(K key, V value) {
+    public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {
         Objects.requireNonNull(value);
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -1075,7 +1078,7 @@ public synchronized V replace(K key, V value) {
      * mapping function modified this map
      */
     @Override
-    public synchronized @PolyNull V computeIfAbsent(K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
+    public synchronized @PolyNull V computeIfAbsent(@Growable Hashtable<K, V> this, K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
 
         Entry<?,?> tab[] = table;
@@ -1111,7 +1114,7 @@ public synchronized V replace(K key, V value) {
      * remapping function modified this map
      */
     @Override
-    public synchronized @PolyNull V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
+    public synchronized @PolyNull V computeIfPresent(@Shrinkable @Replaceable Hashtable<K, V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
         Entry<?,?> tab[] = table;
@@ -1153,7 +1156,7 @@ public synchronized V replace(K key, V value) {
      * remapping function modified this map
      */
     @Override
-    public synchronized @PolyNull V compute(K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
+    public synchronized @PolyNull V compute(@Modifiable Hashtable<K, V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
         Entry<?,?> tab[] = table;
@@ -1204,7 +1207,7 @@ public synchronized V replace(K key, V value) {
      * remapping function modified this map
      */
     @Override
-    public synchronized @PolyNull V merge(K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
+    public synchronized @PolyNull V merge(@Modifiable Hashtable<K, V> this, K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
         Entry<?,?> tab[] = table;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 922ea62a85e2..13b934ca653b 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -25,7 +25,9 @@
 
 package java.util;
 
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 
@@ -127,8 +129,8 @@
  */
 
 @CFComment({"lock/nullness: This class permits null elements"})
-@AnnotatedFor({"lock", "nullness"})
-public @Modifiable class LinkedHashSet<E>
+@AnnotatedFor({"lock", "nullness", "modifiability"})
+public class LinkedHashSet<E>
     extends HashSet<E>
     implements SequencedSet<E>, Cloneable, java.io.Serializable {
 
@@ -247,7 +249,7 @@ LinkedHashMap<E, Object> map() {
      *
      * @since 21
      */
-    public void addFirst(E e) {
+    public void addFirst(@Growable LinkedHashSet<E> this, E e) {
         map().putFirst(e, PRESENT);
     }
 
@@ -259,7 +261,7 @@ public void addFirst(E e) {
      *
      * @since 21
      */
-    public void addLast(E e) {
+    public void addLast(@Growable LinkedHashSet<E> this, E e) {
         map().putLast(e, PRESENT);
     }
 
@@ -289,7 +291,7 @@ public E getLast() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeFirst() {
+    public E removeFirst(@Shrinkable LinkedHashSet<E> this) {
         return map().sequencedKeySet().removeFirst();
     }
 
@@ -299,7 +301,7 @@ public E removeFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeLast() {
+    public E removeLast(@Shrinkable LinkedHashSet<E> this) {
         return map().sequencedKeySet().removeLast();
     }
 
@@ -316,13 +318,13 @@ public SequencedSet<E> reversed() {
         class ReverseLinkedHashSetView extends AbstractSet<E> implements SequencedSet<E> {
             public int size()                  { return LinkedHashSet.this.size(); }
             public Iterator<E> iterator()      { return map().sequencedKeySet().reversed().iterator(); }
-            public boolean add(E e)            { return LinkedHashSet.this.add(e); }
-            public void addFirst(E e)          { LinkedHashSet.this.addLast(e); }
-            public void addLast(E e)           { LinkedHashSet.this.addFirst(e); }
+            public boolean add(@Growable ReverseLinkedHashSetView this, E e)            { return LinkedHashSet.this.add(e); }
+            public void addFirst(@Growable ReverseLinkedHashSetView this, E e)          { LinkedHashSet.this.addLast(e); }
+            public void addLast(@Growable ReverseLinkedHashSetView this, E e)           { LinkedHashSet.this.addFirst(e); }
             public E getFirst()                { return LinkedHashSet.this.getLast(); }
             public E getLast()                 { return LinkedHashSet.this.getFirst(); }
-            public E removeFirst()             { return LinkedHashSet.this.removeLast(); }
-            public E removeLast()              { return LinkedHashSet.this.removeFirst(); }
+            public E removeFirst(@Shrinkable ReverseLinkedHashSetView this)             { return LinkedHashSet.this.removeLast(); }
+            public E removeLast(@Shrinkable ReverseLinkedHashSetView this)              { return LinkedHashSet.this.removeFirst(); }
             public SequencedSet<E> reversed()  { return LinkedHashSet.this; }
             public Object[] toArray() { return map().keysToArray(new Object[map.size()], true); }
             public <T> T[] toArray(T[] a) { return map().keysToArray(map.prepareArray(a), true); }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 51f5cf3c6491..1c964058b6d3 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -30,7 +30,10 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -113,8 +116,8 @@
  */
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
-@AnnotatedFor({"lock", "nullness"})
-public @Modifiable class TreeSet<E> extends AbstractSet<E>
+@AnnotatedFor({"lock", "nullness", "modifiability"})
+public class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**
@@ -128,7 +131,7 @@
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -145,7 +148,7 @@
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public TreeSet() {
+    public @Modifiable TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -162,7 +165,7 @@ public TreeSet() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -180,7 +183,7 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -192,7 +195,7 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -203,7 +206,7 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      * @return an iterator over the elements in this set in ascending order
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
         return m.navigableKeySet().iterator();
     }
 
@@ -213,14 +216,14 @@ public TreeSet(@Nullable Comparator<? super E> comparator) {
      * @return an iterator over the elements in this set in descending order
      * @since 1.6
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
         return m.descendingKeySet().iterator();
     }
 
     /**
      * @since 1.6
      */
-    public NavigableSet<E> descendingSet() {
+    public @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable TreeSet<E> this) {
         return new TreeSet<>(m.descendingMap());
     }
 
@@ -284,7 +287,7 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
      *         does not permit null elements
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied TreeSet<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied TreeSet<E> this, E e) {
         return m.put(e, PRESENT)==null;
     }
 
@@ -305,7 +308,7 @@ public boolean add(@GuardSatisfied TreeSet<E> this, E e) {
      *         and this set uses natural ordering, or its comparator
      *         does not permit null elements
      */
-    public boolean remove(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return m.remove(o)==PRESENT;
     }
 
@@ -313,7 +316,7 @@ public boolean remove(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownS
      * Removes all of the elements from this set.
      * The set will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied TreeSet<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         m.clear();
     }
 
@@ -328,7 +331,7 @@ public void clear(@GuardSatisfied TreeSet<E> this) {
      *         if any element is null and this set uses natural ordering, or
      *         its comparator does not permit null elements
      */
-    public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E> c) {
+    public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? extends E> c) {
         // Use linear-time version if applicable
         if (m.size()==0 && c.size() > 0 &&
             c instanceof SortedSet &&
@@ -351,7 +354,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyGrowShrink NavigableSet<E> subSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
+    public @PolyModifiable @PolyGrowShrink NavigableSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
                                   @GuardSatisfied E toElement,   boolean toInclusive) {
         return new TreeSet<>(m.subMap(fromElement, fromInclusive,
                                        toElement,   toInclusive));
@@ -366,7 +369,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyGrowShrink NavigableSet<E> headSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E toElement, boolean inclusive) {
+    public @PolyModifiable @PolyGrowShrink NavigableSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E toElement, boolean inclusive) {
         return new TreeSet<>(m.headMap(toElement, inclusive));
     }
 
@@ -379,7 +382,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyGrowShrink NavigableSet<E> tailSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean inclusive) {
+    public @PolyModifiable @PolyGrowShrink NavigableSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean inclusive) {
         return new TreeSet<>(m.tailMap(fromElement, inclusive));
     }
 
@@ -391,7 +394,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyGrowShrink SortedSet<E> subSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement) {
+    public @PolyModifiable @PolyGrowShrink SortedSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement) {
         return subSet(fromElement, true, toElement, false);
     }
 
@@ -403,7 +406,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyGrowShrink SortedSet<E> headSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, E toElement) {
+    public @PolyModifiable @PolyGrowShrink SortedSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E toElement) {
         return headSet(toElement, false);
     }
 
@@ -415,7 +418,7 @@ public  boolean addAll(@GuardSatisfied TreeSet<E> this, Collection<? extends E>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyGrowShrink SortedSet<E> tailSet(@GuardSatisfied @PolyGrowShrink TreeSet<E> this, E fromElement) {
+    public @PolyModifiable @PolyGrowShrink SortedSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E fromElement) {
         return tailSet(fromElement, true);
     }
 
@@ -489,7 +492,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     /**
      * @since 1.6
      */
-    public @Nullable E pollFirst(@GuardSatisfied TreeSet<E> this) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         Map.Entry<E,?> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
     }
@@ -497,7 +500,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     /**
      * @since 1.6
      */
-    public @Nullable E pollLast(@GuardSatisfied TreeSet<E> this) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         Map.Entry<E,?> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
     }
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 465c6faefc65..49b80371f705 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -30,7 +30,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -110,8 +114,8 @@
  * @since   1.0
  */
 @CFComment({"lock/nullness: permits nullable object"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class Vector<E>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class Vector<E>
     extends AbstractList<E>
     implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
@@ -549,7 +553,7 @@ public synchronized E lastElement(@NonEmpty Vector<E> this) {
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
-    public synchronized void setElementAt(@GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
+    public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
         if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
                                                      elementCount);
@@ -576,7 +580,7 @@ public synchronized void setElementAt(@GuardSatisfied Vector<E> this, E obj, @No
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
-    public synchronized void removeElementAt(@GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
+    public synchronized void removeElementAt(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
         if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
                                                      elementCount);
@@ -616,7 +620,7 @@ else if (index < 0) {
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    public synchronized void insertElementAt(@GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
+    public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
         if (index > elementCount) {
             throw new ArrayIndexOutOfBoundsException(index
                                                      + " > " + elementCount);
@@ -644,7 +648,7 @@ public synchronized void insertElementAt(@GuardSatisfied Vector<E> this, E obj,
      *
      * @param   obj   the component to be added
      */
-    public synchronized void addElement(@GuardSatisfied Vector<E> this, E obj) {
+    public synchronized void addElement(@Growable @GuardSatisfied Vector<E> this, E obj) {
         modCount++;
         add(obj, elementData, elementCount);
     }
@@ -664,7 +668,7 @@ public synchronized void addElement(@GuardSatisfied Vector<E> this, E obj) {
      * @return  {@code true} if the argument was a component of this
      *          vector; {@code false} otherwise.
      */
-    public synchronized boolean removeElement(@GuardSatisfied @CanShrink Vector<E> this, Object obj) {
+    public synchronized boolean removeElement(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Object obj) {
         modCount++;
         int i = indexOf(obj);
         if (i >= 0) {
@@ -680,7 +684,7 @@ public synchronized boolean removeElement(@GuardSatisfied @CanShrink Vector<E> t
      * <p>This method is identical in functionality to the {@link #clear}
      * method (which is part of the {@link List} interface).
      */
-    public synchronized void removeAllElements(@GuardSatisfied @CanShrink Vector<E> this) {
+    public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
         final Object[] es = elementData;
         for (int to = elementCount, i = elementCount = 0; i < to; i++)
             es[i] = null;
@@ -799,7 +803,7 @@ public synchronized E get(@GuardSatisfied Vector<E> this, @NonNegative int index
      *         ({@code index < 0 || index >= size()})
      * @since 1.2
      */
-    public synchronized E set(@GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
+    public synchronized E set(@Replaceable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
         if (index >= elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
 
@@ -829,7 +833,7 @@ private void add(E e, Object[] elementData, int s) {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
-    public synchronized boolean add(@GuardSatisfied Vector<E> this, E e) {
+    public synchronized boolean add(@Growable @GuardSatisfied Vector<E> this, E e) {
         modCount++;
         add(e, elementData, elementCount);
         return true;
@@ -846,7 +850,7 @@ public synchronized boolean add(@GuardSatisfied Vector<E> this, E e) {
      * @return true if the Vector contained the specified element
      * @since 1.2
      */
-    public boolean remove(@GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeElement(o);
     }
 
@@ -861,7 +865,7 @@ public boolean remove(@GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied
      *         ({@code index < 0 || index > size()})
      * @since 1.2
      */
-    public void add(@GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
+    public void add(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
         insertElementAt(element, index);
     }
 
@@ -876,7 +880,7 @@ public void add(@GuardSatisfied Vector<E> this, @NonNegative int index, E elemen
      *         ({@code index < 0 || index >= size()})
      * @since 1.2
      */
-    public synchronized E remove(@GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
+    public synchronized E remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
         modCount++;
         if (index >= elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
@@ -897,7 +901,7 @@ public synchronized E remove(@GuardSatisfied @CanShrink Vector<E> this, @NonNega
      *
      * @since 1.2
      */
-    public void clear(@GuardSatisfied @CanShrink Vector<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
         removeAllElements();
     }
 
@@ -931,7 +935,7 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
      * @throws NullPointerException if the specified collection is null
      * @since 1.2
      */
-    public boolean addAll(@GuardSatisfied Vector<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied Vector<E> this, Collection<? extends E> c) {
         Object[] a = c.toArray();
         modCount++;
         int numNew = a.length;
@@ -965,7 +969,7 @@ public boolean addAll(@GuardSatisfied Vector<E> this, Collection<? extends E> c)
      *         or if the specified collection is null
      * @since 1.2
      */
-    public boolean removeAll(@GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -989,7 +993,7 @@ public boolean removeAll(@GuardSatisfied @CanShrink Vector<E> this, Collection<?
      *         or if the specified collection is null
      * @since 1.2
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
@@ -999,7 +1003,7 @@ public boolean retainAll(@GuardSatisfied @CanShrink Vector<E> this, Collection<?
      */
     @SuppressWarnings({"unchecked"})
     @Override
-    public boolean removeIf(@CanShrink Vector<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink Vector<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1068,7 +1072,7 @@ private synchronized boolean bulkRemove(Predicate<? super E> filter) {
      * @throws NullPointerException if the specified collection is null
      * @since 1.2
      */
-    public synchronized boolean addAll(@GuardSatisfied Vector<E> this, @NonNegative int index, Collection<? extends E> c) {
+    public synchronized boolean addAll(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, Collection<? extends E> c) {
         if (index < 0 || index > elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
 
@@ -1161,7 +1165,7 @@ public synchronized String toString(@GuardSatisfied Vector<E> this) {
      *         {@code (fromIndex > toIndex)}
      */
     @SideEffectFree
-    public synchronized @PolyGrowShrink List<E> subList(@GuardSatisfied @PolyGrowShrink Vector<E> this, int fromIndex, int toIndex) {
+    public synchronized @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink Vector<E> this, int fromIndex, int toIndex) {
         return Collections.synchronizedList(super.subList(fromIndex, toIndex),
                                             this);
     }
@@ -1173,7 +1177,7 @@ public synchronized String toString(@GuardSatisfied Vector<E> this) {
      * This call shortens the list by {@code (toIndex - fromIndex)} elements.
      * (If {@code toIndex==fromIndex}, this operation has no effect.)
      */
-    protected synchronized void removeRange(@GuardSatisfied @CanShrink Vector<E> this, int fromIndex, int toIndex) {
+    protected synchronized void removeRange(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, int fromIndex, int toIndex) {
         modCount++;
         shiftTailOverGap(elementData, fromIndex, toIndex);
     }
@@ -1244,7 +1248,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public synchronized @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink Vector<E> this, @NonNegative int index) {
+    public synchronized @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink Vector<E> this, @NonNegative int index) {
         if (index < 0 || index > elementCount)
             throw new IndexOutOfBoundsException("Index: "+index);
         return new ListItr(index);
@@ -1258,7 +1262,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      *
      * @see #listIterator(int)
      */
-    public synchronized @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink Vector<E> this) {
+    public synchronized @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink Vector<E> this) {
         return new ListItr(0);
     }
 
@@ -1270,7 +1274,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public synchronized @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Vector<E> this) {
+    public synchronized @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Vector<E> this) {
         return new Itr();
     }
 
@@ -1414,7 +1418,7 @@ public synchronized void forEach(Consumer<? super E> action) {
      */
     @SuppressWarnings({"unchecked"})
     @Override
-    public synchronized void replaceAll(UnaryOperator<E> operator) {
+    public synchronized void replaceAll(@Replaceable Vector<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final int expectedModCount = modCount;
         final Object[] es = elementData;
@@ -1429,7 +1433,7 @@ public synchronized void replaceAll(UnaryOperator<E> operator) {
 
     @SuppressWarnings("unchecked")
     @Override
-    public synchronized void sort(Comparator<? super E> c) {
+    public synchronized void sort(@Replaceable Vector<E> this, Comparator<? super E> c) {
         final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, elementCount, c);
         if (modCount != expectedModCount)
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 8e81e599faf1..fd182a645a80 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -37,9 +37,11 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -109,8 +111,8 @@
  * @param <E> the type of elements maintained by this set
  * @since 1.6
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class ConcurrentSkipListSet<E extends @NonNull Object>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ConcurrentSkipListSet<E extends @NonNull Object>
     extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable {
 
@@ -128,7 +130,7 @@
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public ConcurrentSkipListSet() {
+    public @Modifiable ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -140,7 +142,7 @@ public ConcurrentSkipListSet() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -155,7 +157,7 @@ public ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -168,7 +170,7 @@ public ConcurrentSkipListSet(Collection<? extends E> c) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -176,7 +178,7 @@ public ConcurrentSkipListSet(SortedSet<E> s) {
     /**
      * For use by submaps
      */
-    ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -264,7 +266,7 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable ConcurrentSkipListSet<E> this, E e) {
         return m.putIfAbsent(e, Boolean.TRUE) == null;
     }
 
@@ -282,14 +284,14 @@ public boolean add(E e) {
      *         with the elements currently in this set
      * @throws NullPointerException if the specified element is null
      */
-    public boolean remove(@GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable ConcurrentSkipListSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return m.remove(o, Boolean.TRUE);
     }
 
     /**
      * Removes all of the elements from this set.
      */
-    public void clear() {
+    public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {
         m.clear();
     }
 
@@ -357,7 +359,7 @@ public boolean equals(@Nullable Object o) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable ConcurrentSkipListSet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         // Override AbstractSet version to avoid unnecessary call to size()
         boolean modified = false;
         for (Object e : c)
@@ -400,12 +402,12 @@ public E higher(E e) {
         return m.higherKey(e);
     }
 
-    public @Nullable E pollFirst() {
+    public @Nullable E pollFirst(@Shrinkable ConcurrentSkipListSet<E> this) {
         Map.Entry<E,Object> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
     }
 
-    public @Nullable E pollLast() {
+    public @Nullable E pollLast(@Shrinkable ConcurrentSkipListSet<E> this) {
         Map.Entry<E,Object> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
     }

From 47a21d2711c4caa419c4dcfa15557bdb3e3640dd Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Fri, 20 Mar 2026 12:49:07 -0700
Subject: [PATCH 038/119] removed annotation on class and fully annotated the
 map files.

---
 .../share/classes/java/util/EnumMap.java      | 43 +++++----
 .../share/classes/java/util/HashMap.java      | 32 ++++---
 .../classes/java/util/IdentityHashMap.java    | 23 +++--
 .../classes/java/util/LinkedHashMap.java      | 59 ++++++------
 .../share/classes/java/util/TreeMap.java      | 91 ++++++++++---------
 .../share/classes/java/util/WeakHashMap.java  | 25 ++---
 .../util/concurrent/ConcurrentHashMap.java    | 43 +++++----
 .../concurrent/ConcurrentSkipListMap.java     | 90 +++++++++---------
 8 files changed, 217 insertions(+), 189 deletions(-)

diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 9921309d39a8..1c90d30c7876 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -28,7 +28,12 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -97,8 +102,8 @@
  * @see EnumSet
  * @since 1.5
  */
-@AnnotatedFor({"nullness", "index"})
-public @Modifiable class EnumMap<K extends Enum<K>, V> extends AbstractMap<K, V>
+@AnnotatedFor({"nullness", "index", "modifiability"})
+public class EnumMap<K extends Enum<K>, V> extends AbstractMap<K, V>
     implements java.io.Serializable, Cloneable
 {
     /**
@@ -153,7 +158,7 @@ private Object maskNull(@Nullable Object value) {
      * @param keyType the class object of the key type for this enum map
      * @throws NullPointerException if {@code keyType} is null
      */
-    public EnumMap(Class<K> keyType) {
+    public @Modifiable EnumMap(Class<K> keyType) {
         this.keyType = keyType;
         keyUniverse = getKeyUniverse(keyType);
         vals = new Object[keyUniverse.length];
@@ -166,7 +171,7 @@ public EnumMap(Class<K> keyType) {
      * @param m the enum map from which to initialize this enum map
      * @throws NullPointerException if {@code m} is null
      */
-    public EnumMap(EnumMap<K, ? extends V> m) {
+    public @Modifiable EnumMap(EnumMap<K, ? extends V> m) {
         keyType = m.keyType;
         keyUniverse = m.keyUniverse;
         vals = m.vals.clone();
@@ -185,7 +190,7 @@ public EnumMap(EnumMap<K, ? extends V> m) {
      *     {@code EnumMap} instance and contains no mappings
      * @throws NullPointerException if {@code m} is null
      */
-    public EnumMap(Map<K, ? extends V> m) {
+    public @Modifiable EnumMap(Map<K, ? extends V> m) {
         if (m instanceof EnumMap) {
             EnumMap<K, ? extends V> em = (EnumMap<K, ? extends V>) m;
             keyType = em.keyType;
@@ -288,7 +293,7 @@ private boolean containsMapping(@GuardSatisfied @UnknownSignedness Object key, @
      * @throws NullPointerException if the specified key is null
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(K key, V value) {
+    public @Nullable V put(@Growable @Replaceable EnumMap<K, V> this, K key, V value) {
         typeCheck(key);
 
         int index = key.ordinal();
@@ -308,7 +313,7 @@ private boolean containsMapping(@GuardSatisfied @UnknownSignedness Object key, @
      *     return can also indicate that the map previously associated
      *     {@code null} with the specified key.)
      */
-    public @Nullable V remove(@GuardSatisfied @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable EnumMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         if (!isValidKey(key))
             return null;
         int index = ((Enum<?>)key).ordinal();
@@ -360,7 +365,7 @@ private boolean isValidKey(@GuardSatisfied @UnknownSignedness Object key) {
                 "and vals are private class members for EnumMap and are absent in AbstractMap."})
     @SuppressWarnings({"nullness:contracts.precondition.override.invalid"})
     @RequiresNonNull({"keyUniverse", "vals"})
-    public void putAll(@UnknownInitialization EnumMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable @UnknownInitialization EnumMap<K, V> this, Map<? extends K, ? extends V> m) {
         if (m instanceof EnumMap<?, ?> em) {
             if (em.keyType != keyType) {
                 if (em.isEmpty())
@@ -384,7 +389,7 @@ public void putAll(@UnknownInitialization EnumMap<K, V> this, Map<? extends K, ?
     /**
      * Removes all mappings from this map.
      */
-    public void clear() {
+    public void clear(@Shrinkable EnumMap<K, V> this) {
         Arrays.fill(vals, null);
         size = 0;
     }
@@ -407,7 +412,7 @@ public void clear() {
      *
      * @return a set view of the keys contained in this enum map
      */
-    public Set<K> keySet() {
+    public @PolyShrink Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -430,12 +435,12 @@ public Iterator<K> iterator() {
         public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsKey(o);
         }
-        public boolean remove(@Nullable @UnknownSignedness Object o) {
+        public boolean remove(@Shrinkable KeySet this, @Nullable @UnknownSignedness Object o) {
             int oldSize = size;
             EnumMap.this.remove(o);
             return size != oldSize;
         }
-        public void clear() {
+        public void clear(@Shrinkable KeySet this) {
             EnumMap.this.clear();
         }
     }
@@ -450,7 +455,7 @@ public void clear() {
      *
      * @return a collection view of the values contained in this map
      */
-    public Collection<V> values() {
+    public @PolyShrink Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -473,7 +478,7 @@ public Iterator<V> iterator() {
         public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsValue(o);
         }
-        public boolean remove(@Nullable @UnknownSignedness Object o) {
+        public boolean remove(@Shrinkable Values this, @Nullable @UnknownSignedness Object o) {
             o = maskNull(o);
 
             for (int i = 0; i < vals.length; i++) {
@@ -485,7 +490,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
             }
             return false;
         }
-        public void clear() {
+        public void clear(@Shrinkable Values this) {
             EnumMap.this.clear();
         }
     }
@@ -500,7 +505,7 @@ public void clear() {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    public Set<Map.Entry<K,V>> entrySet() {
+    public @PolyShrink Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
@@ -520,7 +525,7 @@ public boolean contains(@Nullable @UnknownSignedness Object o) {
             return o instanceof Map.Entry<?, ?> entry
                     && containsMapping(entry.getKey(), entry.getValue());
         }
-        public boolean remove(@Nullable @UnknownSignedness Object o) {
+        public boolean remove(@Shrinkable EntrySet this, @Nullable @UnknownSignedness Object o) {
             return o instanceof Map.Entry<?, ?> entry
                     && removeMapping(entry.getKey(), entry.getValue());
         }
@@ -528,7 +533,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
         public @NonNegative int size() {
             return size;
         }
-        public void clear() {
+        public void clear(@Shrinkable EntrySet this) {
             EnumMap.this.clear();
         }
         @SideEffectFree
@@ -580,7 +585,7 @@ public boolean hasNext() {
             return index != vals.length;
         }
 
-        public void remove() {
+        public void remove(@Shrinkable EnumMapIterator<T> this) {
             checkLastReturnedIndex();
 
             if (vals[lastReturnedIndex] != null) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 74dbfde388e9..1de279204ced 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -33,6 +33,8 @@
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -160,8 +162,8 @@
  * @see     Hashtable
  * @since   1.2
  */
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class HashMap<K,V> extends AbstractMap<K,V>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class HashMap<K,V> extends AbstractMap<K,V>
     implements Map<K,V>, Cloneable, Serializable {
 
     @java.io.Serial
@@ -646,7 +648,7 @@ public boolean containsKey(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied @
      *         previously associated {@code null} with {@code key}.)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GuardSatisfied HashMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, K key, V value) {
         return putVal(hash(key), key, value, false, true);
     }
 
@@ -820,7 +822,7 @@ else if ((e = tab[index = (n - 1) & hash]) != null) {
      * @param m mappings to be stored in this map
      * @throws NullPointerException if the specified map is null
      */
-    public void putAll(@GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extends V> m) {
         putMapEntries(m, true);
     }
 
@@ -833,7 +835,7 @@ public void putAll(@GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extend
      *         (A {@code null} return can also indicate that the map
      *         previously associated {@code null} with {@code key}.)
      */
-    public @Nullable V remove(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable @GuardSatisfied HashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Node<K,V> e;
         return (e = removeNode(hash(key), key, null, false, true)) == null ?
             null : e.value;
@@ -894,7 +896,7 @@ else if (node == p)
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied HashMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied HashMap<K, V> this) {
         Node<K,V>[] tab;
         modCount++;
         if ((tab = table) != null && size > 0) {
@@ -1202,17 +1204,17 @@ public V getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, V
 
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @Override
-    public @Nullable V putIfAbsent(K key, V value) {
+    public @Nullable V putIfAbsent(@Growable HashMap<K,V> this, K key, V value) {
         return putVal(hash(key), key, value, true, true);
     }
 
     @Override
-    public boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
+    public boolean remove(@Shrinkable HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
         return removeNode(hash(key), key, value, true, true) != null;
     }
 
     @Override
-    public boolean replace(K key, V oldValue, V newValue) {
+    public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newValue) {
         Node<K,V> e; V v;
         if ((e = getNode(key)) != null &&
             ((v = e.value) == oldValue || (v != null && v.equals(oldValue)))) {
@@ -1224,7 +1226,7 @@ public boolean replace(K key, V oldValue, V newValue) {
     }
 
     @Override
-    public @Nullable V replace(K key, V value) {
+    public @Nullable V replace(@Replaceable HashMap<K,V> this, K key, V value) {
         Node<K,V> e;
         if ((e = getNode(key)) != null) {
             V oldValue = e.value;
@@ -1246,7 +1248,7 @@ public boolean replace(K key, V oldValue, V newValue) {
      * mapping function modified this map
      */
     @Override
-    public @PolyNull V computeIfAbsent(K key,
+    public @PolyNull V computeIfAbsent(@Growable HashMap<K,V> this, K key,
                              Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (mappingFunction == null)
             throw new NullPointerException();
@@ -1312,7 +1314,7 @@ else if (t != null)
      * remapping function modified this map
      */
     @Override
-    public @PolyNull V computeIfPresent(K key,
+    public @PolyNull V computeIfPresent(@Shrinkable @Replaceable HashMap<K,V> this, K key,
                               BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (remappingFunction == null)
             throw new NullPointerException();
@@ -1346,7 +1348,7 @@ else if (t != null)
      * remapping function modified this map
      */
     @Override
-    public @PolyNull V compute(K key,
+    public @PolyNull V compute(@Modifiable HashMap<K,V> this, K key,
                      BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (remappingFunction == null)
             throw new NullPointerException();
@@ -1411,7 +1413,7 @@ else if (v != null) {
      * remapping function modified this map
      */
     @Override
-    public @PolyNull V merge(K key, @NonNull V value,
+    public @PolyNull V merge(@Modifiable HashMap<K,V> this, K key, @NonNull V value,
                    BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (value == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1488,7 +1490,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
     }
 
     @Override
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable HashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Node<K,V>[] tab;
         if (function == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 6273126ef957..ccd323ff0e9c 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -27,9 +27,12 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -167,8 +170,8 @@
  */
 
 @CFComment({"lock/nullness: This collection can only contain null values"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class IdentityHashMap<K,V>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class IdentityHashMap<K,V>
     extends AbstractMap<K,V>
     implements Map<K,V>, java.io.Serializable, Cloneable
 {
@@ -294,7 +297,7 @@ private void init(int initCapacity) {
      * @param m the map whose mappings are to be placed into this map
      * @throws NullPointerException if the specified map is null
      */
-    public IdentityHashMap(Map<? extends K, ? extends V> m) {
+    public @Modifiable IdentityHashMap(Map<? extends K, ? extends V> m) {
         // Allow for a bit of growth
         this((int) ((1 + m.size()) * 1.1));
         putAll(m);
@@ -460,7 +463,7 @@ private boolean containsMapping(@UnknownSignedness @GuardSatisfied @Nullable Obj
      * @see     #containsKey(Object)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {
         final Object k = maskNull(key);
 
         retryAfterResize: for (;;) {
@@ -541,7 +544,7 @@ private boolean resize(int newCapacity) {
      * @param m mappings to be stored in this map
      * @throws NullPointerException if the specified map is null
      */
-    public void putAll(@GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {
         int n = m.size();
         if (n == 0)
             return;
@@ -563,7 +566,7 @@ public void putAll(@GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K,
      *         (A {@code null} return can also indicate that the map
      *         previously associated {@code null} with {@code key}.)
      */
-    public @Nullable V remove(@GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Object k = maskNull(key);
         Object[] tab = table;
         int len = tab.length;
@@ -659,7 +662,7 @@ private void closeDeletion(int d) {
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied IdentityHashMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         modCount++;
         Object[] tab = table;
         for (int i = 0; i < tab.length; i++)
@@ -1442,7 +1445,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
 
     @SuppressWarnings("unchecked")
     @Override
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable IdentityHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         int expectedModCount = modCount;
 
@@ -1469,7 +1472,7 @@ public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
      * {@code false}.
      */
     @Override
-    public boolean remove(Object key, Object value) {
+    public boolean remove(@Shrinkable IdentityHashMap<K,V> this, Object key, Object value) {
         return removeMapping(key, value);
     }
 
@@ -1483,7 +1486,7 @@ public boolean remove(Object key, Object value) {
      * otherwise it returns {@code false}.
      */
     @Override
-    public boolean replace(K key, V oldValue, V newValue) {
+    public boolean replace(@Replaceable IdentityHashMap<K,V> this, K key, V oldValue, V newValue) {
         Object k = maskNull(key);
         Object[] tab = table;
         int len = tab.length;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index d42224add3a4..34f72f2b77d2 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -27,9 +27,12 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -190,8 +193,8 @@
  * @see     Hashtable
  * @since   1.4
  */
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class LinkedHashMap<K,V>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class LinkedHashMap<K,V>
     extends HashMap<K,V>
     implements SequencedMap<K,V>
 {
@@ -407,7 +410,7 @@ void afterNodeAccess(Node<K,V> e) {
      *
      * @since 21
      */
-    public V putFirst(K k, V v) {
+    public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_FIRST;
             return this.put(k, v);
@@ -424,7 +427,7 @@ public V putFirst(K k, V v) {
      *
      * @since 21
      */
-    public V putLast(K k, V v) {
+    public V putLast(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_LAST;
             return this.put(k, v);
@@ -453,7 +456,7 @@ void internalWriteEntries(java.io.ObjectOutputStream s) throws IOException {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor);
         accessOrder = false;
     }
@@ -469,7 +472,7 @@ public LinkedHashMap(@NonNegative int initialCapacity, float loadFactor) {
      * @param  initialCapacity the initial capacity
      * @throws IllegalArgumentException if the initial capacity is negative
      */
-    public LinkedHashMap(@NonNegative int initialCapacity) {
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity) {
         super(initialCapacity);
         accessOrder = false;
     }
@@ -478,7 +481,7 @@ public LinkedHashMap(@NonNegative int initialCapacity) {
      * Constructs an empty insertion-ordered {@code LinkedHashMap} instance
      * with the default initial capacity (16) and load factor (0.75).
      */
-    public LinkedHashMap() {
+    public @Modifiable LinkedHashMap() {
         super();
         accessOrder = false;
     }
@@ -492,7 +495,7 @@ public LinkedHashMap() {
      * @param  m the map whose mappings are to be placed in this map
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty LinkedHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         super();
         accessOrder = false;
         putMapEntries(m, false);
@@ -509,7 +512,7 @@ public LinkedHashMap() {
      * @throws IllegalArgumentException if the initial capacity is negative
      *         or the load factor is nonpositive
      */
-    public LinkedHashMap(@NonNegative int initialCapacity,
+    public @Modifiable LinkedHashMap(@NonNegative int initialCapacity,
                          float loadFactor,
                          boolean accessOrder) {
         super(initialCapacity, loadFactor);
@@ -576,7 +579,7 @@ public V getOrDefault(@Nullable Object key, V defaultValue) {
     /**
      * {@inheritDoc}
      */
-    public void clear(@GuardSatisfied LinkedHashMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied LinkedHashMap<K, V> this) {
         super.clear();
         head = tail = null;
     }
@@ -1026,7 +1029,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
             throw new ConcurrentModificationException();
     }
 
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable LinkedHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null)
             throw new NullPointerException();
         int mc = modCount;
@@ -1176,19 +1179,19 @@ public V get(Object key) {
             return base.get(key);
         }
 
-        public V put(K key, V value) {
+        public V put(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.put(key, value);
         }
 
-        public V remove(Object key) {
+        public V remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key) {
             return base.remove(key);
         }
 
-        public void putAll(Map<? extends K, ? extends V> m) {
+        public void putAll(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, Map<? extends K, ? extends V> m) {
             base.putAll(m);
         }
 
-        public void clear() {
+        public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
@@ -1218,7 +1221,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
                 throw new ConcurrentModificationException();
         }
 
-        public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+        public void replaceAll(@Replaceable ReversedLinkedHashMapView<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
             if (function == null)
                 throw new NullPointerException();
             int mc = base.modCount;
@@ -1228,35 +1231,35 @@ public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
                 throw new ConcurrentModificationException();
         }
 
-        public V putIfAbsent(K key, V value) {
+        public V putIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.putIfAbsent(key, value);
         }
 
-        public boolean remove(Object key, Object value) {
+        public boolean remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key, Object value) {
             return base.remove(key, value);
         }
 
-        public boolean replace(K key, V oldValue, V newValue) {
+        public boolean replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V oldValue, V newValue) {
             return base.replace(key, oldValue, newValue);
         }
 
-        public V replace(K key, V value) {
+        public V replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.replace(key, value);
         }
 
-        public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
+        public V computeIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, Function<? super K, ? extends V> mappingFunction) {
             return base.computeIfAbsent(key, mappingFunction);
         }
 
-        public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+        public V computeIfPresent(@Shrinkable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             return base.computeIfPresent(key, remappingFunction);
         }
 
-        public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+        public V compute(@Modifiable ReversedLinkedHashMapView<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             return base.compute(key, remappingFunction);
         }
 
-        public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+        public V merge(@Modifiable ReversedLinkedHashMapView<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
             return base.merge(key, value, remappingFunction);
         }
 
@@ -1274,19 +1277,19 @@ public Entry<K, V> lastEntry() {
             return base.firstEntry();
         }
 
-        public Entry<K, V> pollFirstEntry() {
+        public Entry<K, V> pollFirstEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.pollLastEntry();
         }
 
-        public Entry<K, V> pollLastEntry() {
+        public Entry<K, V> pollLastEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.pollFirstEntry();
         }
 
-        public V putFirst(K k, V v) {
+        public V putFirst(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putLast(k, v);
         }
 
-        public V putLast(K k, V v) {
+        public V putLast(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putFirst(k, v);
         }
     }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 11b518caa35e..310920f61f3c 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -27,10 +27,13 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -142,8 +145,8 @@
  */
 
 @CFComment({"lock/nullness: This permits null element when using a custom comparator that allows null"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class TreeMap<K,V>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class TreeMap<K,V>
     extends AbstractMap<K,V>
     implements NavigableMap<K,V>, Cloneable, java.io.Serializable
 {
@@ -180,7 +183,7 @@
      * {@code put(Object key, Object value)} call will throw a
      * {@code ClassCastException}.
      */
-    public TreeMap() {
+    public @Modifiable TreeMap() {
         comparator = null;
     }
 
@@ -198,7 +201,7 @@ public TreeMap() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public TreeMap(@Nullable Comparator<? super K> comparator) {
+    public @Modifiable TreeMap(@Nullable Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -216,7 +219,7 @@ public TreeMap(@Nullable Comparator<? super K> comparator) {
      *         or are not mutually comparable
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         comparator = null;
         putAll(m);
     }
@@ -230,7 +233,7 @@ public TreeMap(@Nullable Comparator<? super K> comparator) {
      *         and whose comparator is to be used to sort this map
      * @throws NullPointerException if the specified map is null
      */
-    public @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
         comparator = m.comparator();
         try {
             buildFromSorted(m.size(), m.entrySet().iterator(), null, null);
@@ -375,7 +378,7 @@ public V putLast(K k, V v) {
      *         the specified map contains a null key and this map does not
      *         permit null keys
      */
-    public void putAll(@GuardSatisfied TreeMap<K, V> this, Map<? extends K, ? extends V> map) {
+    public void putAll(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, Map<? extends K, ? extends V> map) {
         int mapSize = map.size();
         if (size==0 && mapSize!=0 && map instanceof SortedMap) {
             if (Objects.equals(comparator, ((SortedMap<?,?>)map).comparator())) {
@@ -596,12 +599,12 @@ final Entry<K,V> getLowerEntry(K key) {
      *         does not permit null keys
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GuardSatisfied TreeMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, K key, V value) {
         return put(key, value, true);
     }
 
     @Override
-    public V putIfAbsent(K key, V value) {
+    public V putIfAbsent(@Growable TreeMap<K,V> this, K key, V value) {
         return put(key, value, false);
     }
 
@@ -616,7 +619,7 @@ public V putIfAbsent(K key, V value) {
      * mapping function modified this map
      */
     @Override
-    public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
+    public V computeIfAbsent(@Growable TreeMap<K,V> this, K key, Function<? super K, ? extends V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V newValue;
         Entry<K,V> t = root;
@@ -686,7 +689,7 @@ else if (cmp > 0)
      * remapping function modified this map
      */
     @Override
-    public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+    public V computeIfPresent(@Shrinkable @Replaceable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Entry<K,V> oldEntry = getEntry(key);
         if (oldEntry != null && oldEntry.value != null) {
@@ -707,7 +710,7 @@ public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> r
      * remapping function modified this map
      */
     @Override
-    public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+    public V compute(@Modifiable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V newValue;
         Entry<K,V> t = root;
@@ -769,7 +772,7 @@ else if (cmp > 0)
      * remapping function modified this map
      */
     @Override
-    public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+    public V merge(@Modifiable TreeMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Objects.requireNonNull(value);
         Entry<K,V> t = root;
@@ -943,7 +946,7 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      *         and this map uses natural ordering, or its comparator
      *         does not permit null keys
      */
-    public @Nullable V remove(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Entry<K,V> p = getEntry(key);
         if (p == null)
             return null;
@@ -957,7 +960,7 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied TreeMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         modCount++;
         size = 0;
         root = null;
@@ -1013,7 +1016,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
-    public Map.@Nullable Entry<K,V> pollFirstEntry(@GuardSatisfied TreeMap<K, V> this) {
+    public Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         Entry<K,V> p = getFirstEntry();
         Map.Entry<K,V> result = exportEntry(p);
         if (p != null)
@@ -1024,7 +1027,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
-    public Map.@Nullable Entry<K,V> pollLastEntry(@GuardSatisfied TreeMap<K, V> this) {
+    public Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         Entry<K,V> p = getLastEntry();
         Map.Entry<K,V> result = exportEntry(p);
         if (p != null)
@@ -1239,7 +1242,7 @@ public Object clone(@GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableMap<K, V> descendingMap(@GuardSatisfied TreeMap<K, V> this) {
+    public @PolyModifiable NavigableMap<K, V> descendingMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         NavigableMap<K, V> km = descendingMap;
         return (km != null) ? km :
             (descendingMap = new DescendingSubMap<>(this,
@@ -1256,7 +1259,7 @@ public NavigableMap<K, V> descendingMap(@GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableMap<K,V> subMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, boolean fromInclusive,
+    public @PolyModifiable NavigableMap<K,V> subMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, boolean fromInclusive,
                                     @GuardSatisfied K toKey,   boolean toInclusive) {
         return new AscendingSubMap<>(this,
                                      false, fromKey, fromInclusive,
@@ -1272,7 +1275,7 @@ public NavigableMap<K,V> subMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisf
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableMap<K,V> headMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K toKey, boolean inclusive) {
+    public @PolyModifiable NavigableMap<K,V> headMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K toKey, boolean inclusive) {
         return new AscendingSubMap<>(this,
                                      true,  null,  true,
                                      false, toKey, inclusive);
@@ -1287,7 +1290,7 @@ public NavigableMap<K,V> headMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatis
      * @since 1.6
      */
     @SideEffectFree
-    public NavigableMap<K,V> tailMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, boolean inclusive) {
+    public @PolyModifiable NavigableMap<K,V> tailMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, boolean inclusive) {
         return new AscendingSubMap<>(this,
                                      false, fromKey, inclusive,
                                      true,  null,    true);
@@ -1301,7 +1304,7 @@ public NavigableMap<K,V> tailMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatis
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public SortedMap<K,V> subMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, @GuardSatisfied K toKey) {
+    public @PolyModifiable SortedMap<K,V> subMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied K fromKey, @GuardSatisfied K toKey) {
         return subMap(fromKey, true, toKey, false);
     }
 
@@ -1313,7 +1316,7 @@ public SortedMap<K,V> subMap(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public SortedMap<K,V> headMap(@GuardSatisfied TreeMap<K, V> this, K toKey) {
+    public @PolyModifiable SortedMap<K,V> headMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, K toKey) {
         return headMap(toKey, false);
     }
 
@@ -1325,12 +1328,12 @@ public SortedMap<K,V> headMap(@GuardSatisfied TreeMap<K, V> this, K toKey) {
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public SortedMap<K,V> tailMap(@GuardSatisfied TreeMap<K, V> this, K fromKey) {
+    public @PolyModifiable SortedMap<K,V> tailMap(@PolyModifiable @GuardSatisfied TreeMap<K, V> this, K fromKey) {
         return tailMap(fromKey, true);
     }
 
     @Override
-    public boolean replace(K key, V oldValue, V newValue) {
+    public boolean replace(@Replaceable TreeMap<K,V> this, K key, V oldValue, V newValue) {
         Entry<K,V> p = getEntry(key);
         if (p!=null && Objects.equals(oldValue, p.value)) {
             p.value = newValue;
@@ -1340,7 +1343,7 @@ public boolean replace(K key, V oldValue, V newValue) {
     }
 
     @Override
-    public V replace(K key, V value) {
+    public V replace(@Replaceable TreeMap<K,V> this, K key, V value) {
         Entry<K,V> p = getEntry(key);
         if (p!=null) {
             V oldValue = p.value;
@@ -1364,7 +1367,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
     }
 
     @Override
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable TreeMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         int expectedModCount = modCount;
 
@@ -1893,25 +1896,25 @@ public final boolean containsKey(@UnknownSignedness Object key) {
         }
 
         @EnsuresKeyFor(value={"#1"}, map={"this"})
-        public final V put(K key, V value) {
+        public final V put(@Growable @Replaceable NavigableSubMap<K,V> this, K key, V value) {
             if (!inRange(key))
                 throw new IllegalArgumentException("key out of range");
             return m.put(key, value);
         }
 
-        public V putIfAbsent(K key, V value) {
+        public V putIfAbsent(@Growable NavigableSubMap<K,V> this, K key, V value) {
             if (!inRange(key))
                 throw new IllegalArgumentException("key out of range");
             return m.putIfAbsent(key, value);
         }
 
-        public V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+        public V merge(@Modifiable NavigableSubMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
             if (!inRange(key))
                 throw new IllegalArgumentException("key out of range");
             return m.merge(key, value, remappingFunction);
         }
 
-        public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
+        public V computeIfAbsent(@Growable NavigableSubMap<K,V> this, K key, Function<? super K, ? extends V> mappingFunction) {
             if (!inRange(key)) {
                 // Do not throw if mapping function returns null
                 // to preserve compatibility with default computeIfAbsent implementation
@@ -1921,7 +1924,7 @@ public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction
             return m.computeIfAbsent(key, mappingFunction);
         }
 
-        public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+        public V compute(@Modifiable NavigableSubMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             if (!inRange(key)) {
                 // Do not throw if remapping function returns null
                 // to preserve compatibility with default computeIfAbsent implementation
@@ -1931,7 +1934,7 @@ public V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingF
             return m.compute(key, remappingFunction);
         }
 
-        public V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+        public V computeIfPresent(@Shrinkable @Replaceable NavigableSubMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             return !inRange(key) ? null : m.computeIfPresent(key, remappingFunction);
         }
 
@@ -1939,7 +1942,7 @@ public final V get(Object key) {
             return !inRange(key) ? null :  m.get(key);
         }
 
-        public final V remove(Object key) {
+        public final V remove(@Shrinkable NavigableSubMap<K,V> this, Object key) {
             return !inRange(key) ? null : m.remove(key);
         }
 
@@ -1991,7 +1994,7 @@ public final Map.Entry<K,V> lastEntry() {
             return exportEntry(subHighest());
         }
 
-        public final Map.Entry<K,V> pollFirstEntry() {
+        public final Map.Entry<K,V> pollFirstEntry(@Shrinkable NavigableSubMap<K,V> this) {
             TreeMap.Entry<K,V> e = subLowest();
             Map.Entry<K,V> result = exportEntry(e);
             if (e != null)
@@ -1999,7 +2002,7 @@ public final Map.Entry<K,V> pollFirstEntry() {
             return result;
         }
 
-        public final Map.Entry<K,V> pollLastEntry() {
+        public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this) {
             TreeMap.Entry<K,V> e = subHighest();
             Map.Entry<K,V> result = exportEntry(e);
             if (e != null)
@@ -2291,7 +2294,7 @@ public Comparator<? super K> comparator() {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
+        public @PolyModifiable NavigableMap<K,V> subMap(@PolyModifiable AscendingSubMap<K,V> this, K fromKey, boolean fromInclusive,
                                         K toKey,   boolean toInclusive) {
             if (!inRange(fromKey, fromInclusive))
                 throw new IllegalArgumentException("fromKey out of range");
@@ -2303,7 +2306,7 @@ public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> headMap(K toKey, boolean inclusive) {
+        public @PolyModifiable NavigableMap<K,V> headMap(@PolyModifiable AscendingSubMap<K,V> this, K toKey, boolean inclusive) {
             if (!inRange(toKey, inclusive))
                 throw new IllegalArgumentException("toKey out of range");
             return new AscendingSubMap<>(m,
@@ -2312,7 +2315,7 @@ public NavigableMap<K,V> headMap(K toKey, boolean inclusive) {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) {
+        public @PolyModifiable NavigableMap<K,V> tailMap(@PolyModifiable AscendingSubMap<K,V> this, K fromKey, boolean inclusive) {
             if (!inRange(fromKey, inclusive))
                 throw new IllegalArgumentException("fromKey out of range");
             return new AscendingSubMap<>(m,
@@ -2321,7 +2324,7 @@ public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> descendingMap() {
+        public @PolyModifiable NavigableMap<K,V> descendingMap(@PolyModifiable AscendingSubMap<K,V> this) {
             NavigableMap<K,V> mv = descendingMapView;
             return (mv != null) ? mv :
                 (descendingMapView =
@@ -2383,7 +2386,7 @@ public Comparator<? super K> comparator() {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
+        public @PolyModifiable NavigableMap<K,V> subMap(@PolyModifiable DescendingSubMap<K,V> this, K fromKey, boolean fromInclusive,
                                         K toKey,   boolean toInclusive) {
             if (!inRange(fromKey, fromInclusive))
                 throw new IllegalArgumentException("fromKey out of range");
@@ -2395,7 +2398,7 @@ public NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> headMap(K toKey, boolean inclusive) {
+        public @PolyModifiable NavigableMap<K,V> headMap(@PolyModifiable DescendingSubMap<K,V> this, K toKey, boolean inclusive) {
             if (!inRange(toKey, inclusive))
                 throw new IllegalArgumentException("toKey out of range");
             return new DescendingSubMap<>(m,
@@ -2404,7 +2407,7 @@ public NavigableMap<K,V> headMap(K toKey, boolean inclusive) {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) {
+        public @PolyModifiable NavigableMap<K,V> tailMap(@PolyModifiable DescendingSubMap<K,V> this, K fromKey, boolean inclusive) {
             if (!inRange(fromKey, inclusive))
                 throw new IllegalArgumentException("fromKey out of range");
             return new DescendingSubMap<>(m,
@@ -2413,7 +2416,7 @@ public NavigableMap<K,V> tailMap(K fromKey, boolean inclusive) {
         }
 
         @SideEffectFree
-        public NavigableMap<K,V> descendingMap() {
+        public @PolyModifiable NavigableMap<K,V> descendingMap(@PolyModifiable DescendingSubMap<K,V> this) {
             NavigableMap<K,V> mv = descendingMapView;
             return (mv != null) ? mv :
                 (descendingMapView =
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index b83c3e67abac..8f17e4c9a8c8 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -27,9 +27,12 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -153,8 +156,8 @@
  * @see         java.lang.ref.WeakReference
  */
 @CFComment({"lock: permits null keys and values"})
-@AnnotatedFor({"lock", "index", "nullness"})
-public @Modifiable class WeakHashMap<K,V>
+@AnnotatedFor({"lock", "index", "nullness", "modifiability"})
+public class WeakHashMap<K,V>
     extends AbstractMap<K,V>
     implements Map<K,V> {
 
@@ -229,7 +232,7 @@ private Entry<K,V>[] newTable(int n) {
      * @throws IllegalArgumentException if the initial capacity is negative,
      *         or if the load factor is nonpositive.
      */
-    public WeakHashMap(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable WeakHashMap(@NonNegative int initialCapacity, float loadFactor) {
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Initial Capacity: "+
                                                initialCapacity);
@@ -256,7 +259,7 @@ public WeakHashMap(@NonNegative int initialCapacity, float loadFactor) {
      * @param  initialCapacity The initial capacity of the {@code WeakHashMap}
      * @throws IllegalArgumentException if the initial capacity is negative
      */
-    public WeakHashMap(@NonNegative int initialCapacity) {
+    public @Modifiable WeakHashMap(@NonNegative int initialCapacity) {
         this(initialCapacity, DEFAULT_LOAD_FACTOR);
     }
 
@@ -264,7 +267,7 @@ public WeakHashMap(@NonNegative int initialCapacity) {
      * Constructs a new, empty {@code WeakHashMap} with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public WeakHashMap() {
+    public @Modifiable WeakHashMap() {
         this(DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR);
     }
 
@@ -278,7 +281,7 @@ public WeakHashMap() {
      * @throws  NullPointerException if the specified map is null
      * @since   1.3
      */
-    public @PolyNonEmpty WeakHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Modifiable @PolyNonEmpty WeakHashMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         this(Math.max((int) Math.ceil(m.size() / (double)DEFAULT_LOAD_FACTOR),
                 DEFAULT_INITIAL_CAPACITY),
              DEFAULT_LOAD_FACTOR);
@@ -485,7 +488,7 @@ Entry<K,V> getEntry(Object key) {
      *         previously associated {@code null} with {@code key}.)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(@GuardSatisfied WeakHashMap<K, V> this, K key, V value) {
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {
         Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
@@ -577,7 +580,7 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      * @param m mappings to be stored in this map.
      * @throws  NullPointerException if the specified map is null.
      */
-    public void putAll(@GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {
         int numKeysToBeAdded = m.size();
         if (numKeysToBeAdded == 0)
             return;
@@ -626,7 +629,7 @@ public void putAll(@GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? ex
      * @return the previous value associated with {@code key}, or
      *         {@code null} if there was no mapping for {@code key}
      */
-    public @Nullable V remove(@GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
@@ -685,7 +688,7 @@ boolean removeMapping(Object o) {
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied WeakHashMap<K, V> this) {
+    public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         // clear out ref queue. We don't need to expunge entries
         // since table is getting cleared.
         while (queue.poll() != null)
@@ -1095,7 +1098,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
 
     @SuppressWarnings("unchecked")
     @Override
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable WeakHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         int expectedModCount = modCount;
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 7985c8ce046c..1affce11f660 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -36,10 +36,13 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -283,8 +286,8 @@
  * @param <K> the type of keys maintained by this map
  * @param <V> the type of mapped values
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class ConcurrentHashMap<K extends @NonNull Object,V extends @NonNull Object> extends AbstractMap<K,V>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ConcurrentHashMap<K extends @NonNull Object,V extends @NonNull Object> extends AbstractMap<K,V>
     implements ConcurrentMap<K,V>, Serializable {
     private static final long serialVersionUID = 7249069246763182397L;
 
@@ -848,7 +851,7 @@ static final <K,V> void setTabAt(Node<K,V>[] tab, int i, Node<K,V> v) {
     /**
      * Creates a new, empty map with the default initial table size (16).
      */
-    public ConcurrentHashMap() {
+    public @Modifiable ConcurrentHashMap() {
     }
 
     /**
@@ -861,7 +864,7 @@ public ConcurrentHashMap() {
      * @throws IllegalArgumentException if the initial capacity of
      * elements is negative
      */
-    public ConcurrentHashMap(int initialCapacity) {
+    public @Modifiable ConcurrentHashMap(int initialCapacity) {
         this(initialCapacity, LOAD_FACTOR, 1);
     }
 
@@ -870,7 +873,7 @@ public ConcurrentHashMap(int initialCapacity) {
      *
      * @param m the map
      */
-    public ConcurrentHashMap(Map<? extends K, ? extends V> m) {
+    public @Modifiable ConcurrentHashMap(Map<? extends K, ? extends V> m) {
         this.sizeCtl = DEFAULT_CAPACITY;
         putAll(m);
     }
@@ -890,7 +893,7 @@ public ConcurrentHashMap(Map<? extends K, ? extends V> m) {
      *
      * @since 1.6
      */
-    public ConcurrentHashMap(int initialCapacity, float loadFactor) {
+    public @Modifiable ConcurrentHashMap(int initialCapacity, float loadFactor) {
         this(initialCapacity, loadFactor, 1);
     }
 
@@ -912,7 +915,7 @@ public ConcurrentHashMap(int initialCapacity, float loadFactor) {
      * negative or the load factor or concurrencyLevel are
      * nonpositive
      */
-    public ConcurrentHashMap(int initialCapacity,
+    public @Modifiable ConcurrentHashMap(int initialCapacity,
                              float loadFactor, int concurrencyLevel) {
         if (!(loadFactor > 0.0f) || initialCapacity < 0 || concurrencyLevel <= 0)
             throw new IllegalArgumentException();
@@ -1033,7 +1036,7 @@ public boolean containsValue(@GuardSatisfied @UnknownSignedness Object value) {
      * @throws NullPointerException if the specified key or value is null
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V put(K key, V value) {
+    public @Nullable V put(@Growable @Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
         return putVal(key, value, false);
     }
 
@@ -1114,7 +1117,7 @@ else if (f instanceof ReservationNode)
      *
      * @param m mappings to be stored in this map
      */
-    public void putAll(Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable ConcurrentHashMap<K,V> this, Map<? extends K, ? extends V> m) {
         tryPresize(m.size());
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             putVal(e.getKey(), e.getValue(), false);
@@ -1129,7 +1132,7 @@ public void putAll(Map<? extends K, ? extends V> m) {
      *         {@code null} if there was no mapping for {@code key}
      * @throws NullPointerException if the specified key is null
      */
-    public @Nullable V remove(@GuardSatisfied @UnknownSignedness Object key) {
+    public @Nullable V remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
         return replaceNode(key, null, null);
     }
 
@@ -1214,7 +1217,7 @@ else if (f instanceof ReservationNode)
     /**
      * Removes all of the mappings from this map.
      */
-    public void clear() {
+    public void clear(@Shrinkable ConcurrentHashMap<K,V> this) {
         long delta = 0L; // negative number of deletions
         int i = 0;
         Node<K,V>[] tab = table;
@@ -1574,7 +1577,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @throws NullPointerException if the specified key or value is null
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
-    public @Nullable V putIfAbsent(K key, V value) {
+    public @Nullable V putIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, V value) {
         return putVal(key, value, true);
     }
 
@@ -1583,7 +1586,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @throws NullPointerException if the specified key is null
      */
-    public boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+    public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         if (key == null)
             throw new NullPointerException();
         return value != null && replaceNode(key, null, value) != null;
@@ -1594,7 +1597,7 @@ public boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatis
      *
      * @throws NullPointerException if any of the arguments are null
      */
-    public boolean replace(K key, V oldValue, V newValue) {
+    public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldValue, V newValue) {
         if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
         return replaceNode(key, newValue, oldValue) != null;
@@ -1607,7 +1610,7 @@ public boolean replace(K key, V oldValue, V newValue) {
      *         or {@code null} if there was no mapping for the key
      * @throws NullPointerException if the specified key or value is null
      */
-    public @Nullable V replace(K key, V value) {
+    public @Nullable V replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
         if (key == null || value == null)
             throw new NullPointerException();
         return replaceNode(key, value, null);
@@ -1643,7 +1646,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
         }
     }
 
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable ConcurrentHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null) throw new NullPointerException();
         Node<K,V>[] t;
         if ((t = table) != null) {
@@ -1726,7 +1729,7 @@ boolean removeValueIf(Predicate<? super V> function) {
      * @throws RuntimeException or Error if the mappingFunction does so,
      *         in which case the mapping is left unestablished
      */
-    public @PolyNull V computeIfAbsent(K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
+    public @PolyNull V computeIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (key == null || mappingFunction == null)
             throw new NullPointerException();
         int h = spread(key.hashCode());
@@ -1838,7 +1841,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
-    public @PolyNull V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
+    public @PolyNull V computeIfPresent(@Shrinkable @Replaceable ConcurrentHashMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
         int h = spread(key.hashCode());
@@ -1932,7 +1935,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
-    public @PolyNull V compute(K key,
+    public @PolyNull V compute(@Modifiable ConcurrentHashMap<K,V> this, K key,
                      BiFunction<? super K, ? super @Nullable V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
@@ -2061,7 +2064,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
-    public @PolyNull V merge(K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
+    public @PolyNull V merge(@Modifiable ConcurrentHashMap<K,V> this, K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || value == null || remappingFunction == null)
             throw new NullPointerException();
         int h = spread(key.hashCode());
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 062343c89d66..2e86d17af041 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -36,10 +36,14 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@@ -51,6 +55,7 @@
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.VarHandle;
@@ -126,7 +131,8 @@
  * @param <V> the type of mapped values
  * @since 1.6
  */
-public @Modifiable class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
     implements ConcurrentNavigableMap<K,V>, Cloneable, Serializable {
     /*
      * This class implements a tree-like two-dimensionally linked skip
@@ -1086,7 +1092,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      * Constructs a new, empty map, sorted according to the
      * {@linkplain Comparable natural ordering} of the keys.
      */
-    public ConcurrentSkipListMap() {
+    public @Modifiable ConcurrentSkipListMap() {
         this.comparator = null;
     }
 
@@ -1098,7 +1104,7 @@ public ConcurrentSkipListMap() {
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public ConcurrentSkipListMap(Comparator<? super K> comparator) {
+    public @Modifiable ConcurrentSkipListMap(Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -1113,7 +1119,7 @@ public ConcurrentSkipListMap(Comparator<? super K> comparator) {
      * @throws NullPointerException if the specified map or any of its keys
      *         or values are null
      */
-    public ConcurrentSkipListMap(Map<? extends K, ? extends V> m) {
+    public @Modifiable ConcurrentSkipListMap(Map<? extends K, ? extends V> m) {
         this.comparator = null;
         putAll(m);
     }
@@ -1127,7 +1133,7 @@ public ConcurrentSkipListMap(Map<? extends K, ? extends V> m) {
      * @throws NullPointerException if the specified sorted map or any of
      *         its keys or values are null
      */
-    public ConcurrentSkipListMap(SortedMap<K, ? extends V> m) {
+    public @Modifiable ConcurrentSkipListMap(SortedMap<K, ? extends V> m) {
         this.comparator = m.comparator();
         buildFromSorted(m); // initializes transients
     }
@@ -1360,7 +1366,7 @@ public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultVa
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
-    public V put(K key, V value) {
+    public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (value == null)
             throw new NullPointerException();
         return doPut(key, value, false);
@@ -1376,7 +1382,7 @@ public V put(K key, V value) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key is null
      */
-    public V remove(@GuardSatisfied @UnknownSignedness Object key) {
+    public V remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
         return doRemove(key, null);
     }
 
@@ -1431,7 +1437,7 @@ public boolean isEmpty() {
     /**
      * Removes all of the mappings from this map.
      */
-    public void clear() {
+    public void clear(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         Index<K,V> h, r, d; Node<K,V> b;
         VarHandle.acquireFence();
         while ((h = head) != null) {
@@ -1476,7 +1482,7 @@ else if ((d = h.down) != null)    // remove levels
      *         or the mappingFunction is null
      * @since 1.8
      */
-    public @PolyNull V computeIfAbsent(K key,
+    public @PolyNull V computeIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key,
                              Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (key == null || mappingFunction == null)
             throw new NullPointerException();
@@ -1500,7 +1506,7 @@ else if ((d = h.down) != null)    // remove levels
      *         or the remappingFunction is null
      * @since 1.8
      */
-    public @PolyNull V computeIfPresent(K key,
+    public @PolyNull V computeIfPresent(@Shrinkable @Replaceable ConcurrentSkipListMap<K,V> this, K key,
                               BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1532,7 +1538,7 @@ else if (doRemove(key, v) != null)
      *         or the remappingFunction is null
      * @since 1.8
      */
-    public @PolyNull V compute(K key,
+    public @PolyNull V compute(@Modifiable ConcurrentSkipListMap<K,V> this, K key,
                      BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1571,7 +1577,7 @@ else if (doRemove(key, v) != null)
      *         or the remappingFunction is null
      * @since 1.8
      */
-    public @PolyNull V merge(K key, @NonNull V value,
+    public @PolyNull V merge(@Modifiable ConcurrentSkipListMap<K,V> this, K key, @NonNull V value,
                    BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || value == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1706,7 +1712,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> descendingMap() {
+    public @PolyModifiable ConcurrentNavigableMap<K,V> descendingMap(@PolyModifiable ConcurrentSkipListMap<K,V> this) {
         ConcurrentNavigableMap<K,V> dm;
         if ((dm = descendingMap) != null) return dm;
         return descendingMap =
@@ -1810,7 +1816,7 @@ public boolean equals(@Nullable Object o) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
-    public V putIfAbsent(K key, V value) {
+    public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (value == null)
             throw new NullPointerException();
         return doPut(key, value, true);
@@ -1823,7 +1829,7 @@ public V putIfAbsent(K key, V value) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key is null
      */
-    public boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+    public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         if (key == null)
             throw new NullPointerException();
         return value != null && doRemove(key, value) != null;
@@ -1836,7 +1842,7 @@ public boolean remove(@GuardSatisfied @UnknownSignedness Object key, @GuardSatis
      *         with the keys currently in the map
      * @throws NullPointerException if any of the arguments are null
      */
-    public boolean replace(K key, V oldValue, V newValue) {
+    public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V oldValue, V newValue) {
         if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
         for (;;) {
@@ -1861,7 +1867,7 @@ public boolean replace(K key, V oldValue, V newValue) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
-    public V replace(K key, V value) {
+    public V replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (key == null || value == null)
             throw new NullPointerException();
         for (;;) {
@@ -1931,7 +1937,7 @@ public V putLast(K k, V v) {
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> subMap(K fromKey,
+    public @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K fromKey,
                                               boolean fromInclusive,
                                               K toKey,
                                               boolean toInclusive) {
@@ -1947,7 +1953,7 @@ public ConcurrentNavigableMap<K,V> subMap(K fromKey,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> headMap(K toKey,
+    public @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K toKey,
                                                boolean inclusive) {
         if (toKey == null)
             throw new NullPointerException();
@@ -1961,7 +1967,7 @@ public ConcurrentNavigableMap<K,V> headMap(K toKey,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> tailMap(K fromKey,
+    public @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K fromKey,
                                                boolean inclusive) {
         if (fromKey == null)
             throw new NullPointerException();
@@ -1975,7 +1981,7 @@ public ConcurrentNavigableMap<K,V> tailMap(K fromKey,
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> subMap(K fromKey, K toKey) {
+    public @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K fromKey, K toKey) {
         return subMap(fromKey, true, toKey, false);
     }
 
@@ -1985,7 +1991,7 @@ public ConcurrentNavigableMap<K,V> subMap(K fromKey, K toKey) {
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> headMap(K toKey) {
+    public @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K toKey) {
         return headMap(toKey, false);
     }
 
@@ -1995,7 +2001,7 @@ public ConcurrentNavigableMap<K,V> headMap(K toKey) {
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public ConcurrentNavigableMap<K,V> tailMap(K fromKey) {
+    public @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentSkipListMap<K,V> this, K fromKey) {
         return tailMap(fromKey, true);
     }
 
@@ -2119,7 +2125,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.@Unmodifiable Entry<K,V> pollFirstEntry() {
+    public Map.@Unmodifiable Entry<K,V> pollFirstEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         return doRemoveFirstEntry();
     }
 
@@ -2129,7 +2135,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
-    public Map.@Unmodifiable Entry<K,V> pollLastEntry() {
+    public Map.@Unmodifiable Entry<K,V> pollLastEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         return doRemoveLastEntry();
     }
 
@@ -2704,12 +2710,12 @@ public V get(Object key) {
             return (!inBounds(key, m.comparator)) ? null : m.get(key);
         }
 
-        public V put(K key, V value) {
+        public V put(@Growable @Replaceable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.put(key, value);
         }
 
-        public V remove(Object key) {
+        public V remove(@Shrinkable SubMap<K,V> this, Object key) {
             return (!inBounds(key, m.comparator)) ? null : m.remove(key);
         }
 
@@ -2748,7 +2754,7 @@ public boolean containsValue(@UnknownSignedness Object value) {
             return false;
         }
 
-        public void clear() {
+        public void clear(@Shrinkable SubMap<K,V> this) {
             Comparator<? super K> cmp = m.comparator;
             for (ConcurrentSkipListMap.Node<K,V> n = loNode(cmp);
                  isBeforeEnd(n, cmp);
@@ -2760,21 +2766,21 @@ public void clear() {
 
         /* ----------------  ConcurrentMap API methods -------------- */
 
-        public V putIfAbsent(K key, V value) {
+        public V putIfAbsent(@Growable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.putIfAbsent(key, value);
         }
 
-        public boolean remove(@UnknownSignedness Object key, @UnknownSignedness Object value) {
+        public boolean remove(@Shrinkable SubMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value) {
             return inBounds(key, m.comparator) && m.remove(key, value);
         }
 
-        public boolean replace(K key, V oldValue, V newValue) {
+        public boolean replace(@Replaceable SubMap<K,V> this, K key, V oldValue, V newValue) {
             checkKeyBounds(key, m.comparator);
             return m.replace(key, oldValue, newValue);
         }
 
-        public V replace(K key, V value) {
+        public V replace(@Replaceable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.replace(key, value);
         }
@@ -2831,7 +2837,7 @@ SubMap<K,V> newSubMap(K fromKey, boolean fromInclusive,
         }
 
         @SideEffectFree
-        public SubMap<K,V> subMap(K fromKey, boolean fromInclusive,
+        public @PolyModifiable SubMap<K,V> subMap(@PolyModifiable SubMap<K,V> this, K fromKey, boolean fromInclusive,
                                   K toKey, boolean toInclusive) {
             if (fromKey == null || toKey == null)
                 throw new NullPointerException();
@@ -2839,36 +2845,36 @@ public SubMap<K,V> subMap(K fromKey, boolean fromInclusive,
         }
 
         @SideEffectFree
-        public SubMap<K,V> headMap(K toKey, boolean inclusive) {
+        public @PolyModifiable SubMap<K,V> headMap(@PolyModifiable SubMap<K,V> this, K toKey, boolean inclusive) {
             if (toKey == null)
                 throw new NullPointerException();
             return newSubMap(null, false, toKey, inclusive);
         }
 
         @SideEffectFree
-        public SubMap<K,V> tailMap(K fromKey, boolean inclusive) {
+        public @PolyModifiable SubMap<K,V> tailMap(@PolyModifiable SubMap<K,V> this, K fromKey, boolean inclusive) {
             if (fromKey == null)
                 throw new NullPointerException();
             return newSubMap(fromKey, inclusive, null, false);
         }
 
         @SideEffectFree
-        public SubMap<K,V> subMap(K fromKey, K toKey) {
+        public @PolyModifiable SubMap<K,V> subMap(@PolyModifiable SubMap<K,V> this, K fromKey, K toKey) {
             return subMap(fromKey, true, toKey, false);
         }
 
         @SideEffectFree
-        public SubMap<K,V> headMap(K toKey) {
+        public @PolyModifiable SubMap<K,V> headMap(@PolyModifiable SubMap<K,V> this, K toKey) {
             return headMap(toKey, false);
         }
 
         @SideEffectFree
-        public SubMap<K,V> tailMap(K fromKey) {
+        public @PolyModifiable SubMap<K,V> tailMap(@PolyModifiable SubMap<K,V> this, K fromKey) {
             return tailMap(fromKey, true);
         }
 
         @SideEffectFree
-        public SubMap<K,V> descendingMap() {
+        public @PolyModifiable SubMap<K,V> descendingMap(@PolyModifiable SubMap<K,V> this) {
             return new SubMap<K,V>(m, lo, loInclusive,
                                    hi, hiInclusive, !isDescending);
         }
@@ -2923,11 +2929,11 @@ public Map.Entry<K,V> lastEntry() {
             return isDescending ? lowestEntry() : highestEntry();
         }
 
-        public Map.Entry<K,V> pollFirstEntry() {
+        public Map.Entry<K,V> pollFirstEntry(@Shrinkable SubMap<K,V> this) {
             return isDescending ? removeHighest() : removeLowest();
         }
 
-        public Map.Entry<K,V> pollLastEntry() {
+        public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
             return isDescending ? removeLowest() : removeHighest();
         }
 
@@ -3128,7 +3134,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
         }
     }
 
-    public void replaceAll(BiFunction<? super K, ? super V, ? extends V> function) {
+    public void replaceAll(@Replaceable ConcurrentSkipListMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null) throw new NullPointerException();
         Node<K,V> b, n; V v;
         if ((b = baseHead()) != null) {

From 01ff0866920121f90bae3abd866d496df3b9bea5 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 22 Mar 2026 18:10:33 -0700
Subject: [PATCH 039/119] finished annotating queue

---
 .../classes/java/util/AbstractQueue.java      | 16 ++--
 .../share/classes/java/util/ArrayDeque.java   | 59 ++++++------
 .../share/classes/java/util/Deque.java        | 40 ++++-----
 .../share/classes/java/util/LinkedList.java   | 58 ++++++------
 .../classes/java/util/PriorityQueue.java      | 35 ++++----
 .../share/classes/java/util/Queue.java        | 12 +--
 .../util/concurrent/ArrayBlockingQueue.java   | 44 ++++-----
 .../java/util/concurrent/BlockingDeque.java   | 57 ++++++------
 .../java/util/concurrent/BlockingQueue.java   | 25 +++---
 .../concurrent/ConcurrentLinkedDeque.java     | 59 ++++++------
 .../concurrent/ConcurrentLinkedQueue.java     | 31 ++++---
 .../java/util/concurrent/DelayQueue.java      | 38 ++++----
 .../util/concurrent/LinkedBlockingDeque.java  | 90 ++++++++++---------
 .../util/concurrent/LinkedBlockingQueue.java  | 42 ++++-----
 .../util/concurrent/LinkedTransferQueue.java  | 48 +++++-----
 .../concurrent/PriorityBlockingQueue.java     | 46 +++++-----
 .../util/concurrent/SynchronousQueue.java     | 38 ++++----
 .../java/util/concurrent/TransferQueue.java   | 11 ++-
 18 files changed, 395 insertions(+), 354 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index 0de1e4b3c3eb..b1272f0d6f5a 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -37,7 +37,9 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -68,15 +70,15 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"lock", "nullness"})
-public @Modifiable abstract class AbstractQueue<E>
+@AnnotatedFor({"lock", "nullness", "modifiability"})
+public abstract class AbstractQueue<E>
     extends AbstractCollection<E>
     implements Queue<E> {
 
     /**
      * Constructor for use by subclasses.
      */
-    protected AbstractQueue() {
+    protected @Modifiable AbstractQueue() {
     }
 
     /**
@@ -100,7 +102,7 @@ protected AbstractQueue() {
      *         prevents it from being added to this queue
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied AbstractQueue<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
         if (offer(e))
             return true;
         else
@@ -118,7 +120,7 @@ public boolean add(@GuardSatisfied AbstractQueue<E> this, E e) {
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
-    public E remove(@GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {
         E x = poll();
         if (x != null)
             return x;
@@ -152,7 +154,7 @@ public E element(@GuardSatisfied @NonEmpty AbstractQueue<E> this) {
      * <p>This implementation repeatedly invokes {@link #poll poll} until it
      * returns {@code null}.
      */
-    public void clear(@GuardSatisfied @CanShrink AbstractQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {
         while (poll() != null)
             ;
     }
@@ -186,7 +188,7 @@ public void clear(@GuardSatisfied @CanShrink AbstractQueue<E> this) {
      *         this time due to insertion restrictions
      * @see #add(Object)
      */
-    public boolean addAll(@GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {
         if (c == null)
             throw new NullPointerException();
         if (c == this)
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index af465bdb2f00..3694f82a9888 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -38,7 +38,10 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -105,8 +108,8 @@
  * @param <E> the type of elements held in this deque
  * @since   1.6
  */
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class ArrayDeque<E extends @NonNull Object> extends AbstractCollection<E>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class ArrayDeque<E extends @NonNull Object> extends AbstractCollection<E>
                            implements Deque<E>, Cloneable, Serializable
 {
     /*
@@ -198,7 +201,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public ArrayDeque() {
+    public @Modifiable ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -208,7 +211,7 @@ public ArrayDeque() {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -225,7 +228,7 @@ public ArrayDeque(@NonNegative int numElements) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -302,7 +305,7 @@ static final <E> E nonNullElementAt(@PolyNull @PolySigned Object[] es, int i) {
      * @param e the element to add
      * @throws NullPointerException if the specified element is null
      */
-    public void addFirst(@GuardSatisfied ArrayDeque<E> this, E e) {
+    public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
@@ -319,7 +322,7 @@ public void addFirst(@GuardSatisfied ArrayDeque<E> this, E e) {
      * @param e the element to add
      * @throws NullPointerException if the specified element is null
      */
-    public void addLast(@GuardSatisfied ArrayDeque<E> this, E e) {
+    public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
@@ -338,7 +341,7 @@ public void addLast(@GuardSatisfied ArrayDeque<E> this, E e) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable ArrayDeque<E> this, Collection<? extends E> c) {
         final int s, needed;
         if ((needed = (s = size()) + c.size() + 1 - elements.length) > 0)
             grow(needed);
@@ -357,7 +360,7 @@ private void copyElements(Collection<? extends E> c) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offerFirst(E e) {
+    public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
         addFirst(e);
         return true;
     }
@@ -369,7 +372,7 @@ public boolean offerFirst(E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offerLast(E e) {
+    public boolean offerLast(@Growable ArrayDeque<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -377,7 +380,7 @@ public boolean offerLast(E e) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         E e = pollFirst();
         if (e == null)
             throw new NoSuchElementException();
@@ -387,14 +390,14 @@ public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeLast(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         E e = pollLast();
         if (e == null)
             throw new NoSuchElementException();
         return e;
     }
 
-    public @Nullable E pollFirst(@GuardSatisfied @CanShrink ArrayDeque<E> this) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         final Object[] es;
         final int h;
         E e = elementAt(es = elements, h = head);
@@ -405,7 +408,7 @@ public E removeLast(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         return e;
     }
 
-    public @Nullable E pollLast(@GuardSatisfied @CanShrink ArrayDeque<E> this) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         final Object[] es;
         final int t;
         E e = elementAt(es = elements, t = dec(tail, es.length));
@@ -458,7 +461,7 @@ public E getLast(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      * @param o element to be removed from this deque, if present
      * @return {@code true} if the deque contained the specified element
      */
-    public boolean removeFirstOccurrence(@GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o != null) {
             final Object[] es = elements;
             for (int i = head, end = tail, to = (i <= end) ? end : es.length;
@@ -486,7 +489,7 @@ public boolean removeFirstOccurrence(@GuardSatisfied @CanShrink ArrayDeque<E> th
      * @param o element to be removed from this deque, if present
      * @return {@code true} if the deque contained the specified element
      */
-    public boolean removeLastOccurrence(@GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o != null) {
             final Object[] es = elements;
             for (int i = tail, end = head, to = (i >= end) ? end : 0;
@@ -514,7 +517,7 @@ public boolean removeLastOccurrence(@GuardSatisfied @CanShrink ArrayDeque<E> thi
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied ArrayDeque<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -528,7 +531,7 @@ public boolean add(@GuardSatisfied ArrayDeque<E> this, E e) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(@GuardSatisfied ArrayDeque<E> this, E e) {
+    public boolean offer(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         return offerLast(e);
     }
 
@@ -543,7 +546,7 @@ public boolean offer(@GuardSatisfied ArrayDeque<E> this, E e) {
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         return removeFirst();
     }
 
@@ -557,7 +560,7 @@ public E remove(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
      * @return the head of the queue represented by this deque, or
      *         {@code null} if this deque is empty
      */
-    public @Nullable E poll(@GuardSatisfied @CanShrink ArrayDeque<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         return pollFirst();
     }
 
@@ -600,7 +603,7 @@ public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      * @param e the element to push
      * @throws NullPointerException if the specified element is null
      */
-    public void push(@GuardSatisfied ArrayDeque<E> this, E e) {
+    public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         addFirst(e);
     }
 
@@ -614,7 +617,7 @@ public void push(@GuardSatisfied ArrayDeque<E> this, E e) {
      *         of the stack represented by this deque)
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E pop(@GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         return removeFirst();
     }
 
@@ -696,11 +699,11 @@ public boolean isEmpty(@GuardSatisfied ArrayDeque<E> this) {
      * @return an iterator over the elements in this deque
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
         return new DeqIterator();
     }
 
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
         return new DescendingIterator();
     }
 
@@ -929,7 +932,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink ArrayDeque<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink ArrayDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -945,7 +948,7 @@ public boolean removeAll(@CanShrink ArrayDeque<E> this, Collection<? extends @Un
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
@@ -1061,7 +1064,7 @@ public boolean contains(@GuardSatisfied ArrayDeque<E> this, @GuardSatisfied @Nul
      * @param o element to be removed from this deque, if present
      * @return {@code true} if this deque contained the specified element
      */
-    public boolean remove(@GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
 
@@ -1069,7 +1072,7 @@ public boolean remove(@GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatis
      * Removes all of the elements from this deque.
      * The deque will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink ArrayDeque<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         circularClear(elements, head, tail);
         head = tail = 0;
     }
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 196cf0d9a010..b28d09550095 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -220,8 +220,8 @@
  * @param <E> the type of elements held in this deque
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable interface Deque<E> extends Queue<E>, SequencedCollection<E> {
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     /**
      * Inserts the specified element at the front of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
@@ -240,7 +240,7 @@
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addFirst(@GuardSatisfied Deque<E> this, E e);
+    void addFirst(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -262,7 +262,7 @@
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    void addLast(@GuardSatisfied Deque<E> this, E e);
+    void addLast(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque unless it would
@@ -280,7 +280,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offerFirst(E e);
+    boolean offerFirst(@Growable Deque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque unless it would
@@ -298,7 +298,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offerLast(E e);
+    boolean offerLast(@Growable Deque<E> this, E e);
 
     /**
      * Retrieves and removes the first element of this deque.  This method
@@ -308,7 +308,7 @@
      * @return the head of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeFirst(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque.  This method
@@ -318,7 +318,7 @@
      * @return the tail of this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E removeLast(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the first element of this deque,
@@ -326,7 +326,7 @@
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollFirst(@GuardSatisfied @CanShrink Deque<E> this);
+    @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the last element of this deque,
@@ -334,7 +334,7 @@
      *
      * @return the tail of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E pollLast(@GuardSatisfied @CanShrink Deque<E> this);
+    @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
      * Retrieves, but does not remove, the first element of this deque.
@@ -392,7 +392,7 @@
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
-    boolean removeFirstOccurrence(@GuardSatisfied @CanShrink Deque<E> this, Object o);
+    boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, Object o);
 
     /**
      * Removes the last occurrence of the specified element from this deque.
@@ -411,7 +411,7 @@
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
-    boolean removeLastOccurrence(@GuardSatisfied @CanShrink Deque<E> this, Object o);
+    boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, Object o);
 
     // *** Queue methods ***
 
@@ -438,7 +438,7 @@
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    boolean add(@GuardSatisfied Deque<E> this, E e);
+    boolean add(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Inserts the specified element into the queue represented by this deque
@@ -461,7 +461,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offer(E e);
+    boolean offer(@Growable Deque<E> this, E e);
 
     /**
      * Retrieves and removes the head of the queue represented by this deque
@@ -474,7 +474,7 @@
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E remove(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
      * Retrieves and removes the head of the queue represented by this deque
@@ -486,7 +486,7 @@
      * @return the first element of this deque, or {@code null} if
      *         this deque is empty
      */
-    @Nullable E poll(@GuardSatisfied @CanShrink Deque<E> this);
+    @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
      * Retrieves, but does not remove, the head of the queue represented by
@@ -537,7 +537,7 @@
      * @throws IllegalArgumentException if some property of an element of the
      *         specified collection prevents it from being added to this deque
      */
-    boolean addAll(Collection<? extends E> c);
+    boolean addAll(@Growable Deque<E> this, Collection<? extends E> c);
 
     // *** Stack methods ***
 
@@ -559,7 +559,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    void push(@GuardSatisfied Deque<E> this, E e);
+    void push(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
      * Pops an element from the stack represented by this deque.  In other
@@ -571,7 +571,7 @@
      *         of the stack represented by this deque)
      * @throws NoSuchElementException if this deque is empty
      */
-    E pop(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
+    E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
 
     // *** Collection methods ***
@@ -595,7 +595,7 @@
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
-    boolean remove(@GuardSatisfied @CanShrink Deque<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns {@code true} if this deque contains the specified element.
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index c259bce02c1f..b4b11f1edf6d 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -31,7 +31,11 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -109,8 +113,8 @@
  */
 
 @CFComment({"lock/nullness: This class permits null elements"})
-@AnnotatedFor({"lock", "nullness", "index"})
-public @Modifiable class LinkedList<E>
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
+public class LinkedList<E>
     extends AbstractSequentialList<E>
     implements List<E>, Deque<E>, Cloneable, java.io.Serializable
 {
@@ -298,7 +302,7 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @return the first element from this list
      * @throws NoSuchElementException if this list is empty
      */
-    public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         if (f == null)
             throw new NoSuchElementException();
@@ -311,7 +315,7 @@ public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
      * @return the last element from this list
      * @throws NoSuchElementException if this list is empty
      */
-    public E removeLast(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         final Node<E> l = last;
         if (l == null)
             throw new NoSuchElementException();
@@ -323,7 +327,7 @@ public E removeLast(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
      *
      * @param e the element to add
      */
-    public void addFirst(@GuardSatisfied LinkedList<E> this, E e) {
+    public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkFirst(e);
     }
 
@@ -334,7 +338,7 @@ public void addFirst(@GuardSatisfied LinkedList<E> this, E e) {
      *
      * @param e the element to add
      */
-    public void addLast(@GuardSatisfied LinkedList<E> this, E e) {
+    public void addLast(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkLast(e);
     }
 
@@ -373,7 +377,7 @@ public boolean contains(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nul
      */
     @ReleasesNoLocks
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied LinkedList<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkLast(e);
         return true;
     }
@@ -392,7 +396,7 @@ public boolean add(@GuardSatisfied LinkedList<E> this, E e) {
      * @return {@code true} if this list contained the specified element
      */
     @ReleasesNoLocks
-    public boolean remove(@GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) {
             for (Node<E> x = first; x != null; x = x.next) {
                 if (x.item == null) {
@@ -423,7 +427,7 @@ public boolean remove(@GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatis
      * @return {@code true} if this list changed as a result of the call
      * @throws NullPointerException if the specified collection is null
      */
-    public boolean addAll(@GuardSatisfied LinkedList<E> this, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, Collection<? extends E> c) {
         return addAll(size, c);
     }
 
@@ -442,7 +446,7 @@ public boolean addAll(@GuardSatisfied LinkedList<E> this, Collection<? extends E
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @throws NullPointerException if the specified collection is null
      */
-    public boolean addAll(@GuardSatisfied LinkedList<E> this, @NonNegative int index, Collection<? extends E> c) {
+    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, Collection<? extends E> c) {
         checkPositionIndex(index);
 
         Object[] a = c.toArray();
@@ -485,7 +489,7 @@ public boolean addAll(@GuardSatisfied LinkedList<E> this, @NonNegative int index
      * Removes all of the elements from this list.
      * The list will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink LinkedList<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         // Clearing all of the links between nodes is "unnecessary", but:
         // - helps a generational GC if the discarded nodes inhabit
         //   more than one generation
@@ -527,7 +531,7 @@ public E get(@GuardSatisfied LinkedList<E> this, @NonNegative int index) {
      * @return the element previously at the specified position
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public E set(@GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
+    public E set(@Replaceable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
         checkElementIndex(index);
         Node<E> x = node(index);
         E oldVal = x.item;
@@ -544,7 +548,7 @@ public E set(@GuardSatisfied LinkedList<E> this, @NonNegative int index, E eleme
      * @param element element to be inserted
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public void add(@GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
+    public void add(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
         checkPositionIndex(index);
 
         if (index == size)
@@ -562,7 +566,7 @@ public void add(@GuardSatisfied LinkedList<E> this, @NonNegative int index, E el
      * @return the element previously at the specified position
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @CanShrink LinkedList<E> this, @NonNegative int index) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @NonNegative int index) {
         checkElementIndex(index);
         return unlink(node(index));
     }
@@ -713,7 +717,7 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @return the head of this list, or {@code null} if this list is empty
      * @since 1.5
      */
-    public @Nullable E poll(@GuardSatisfied @CanShrink LinkedList<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
     }
@@ -725,7 +729,7 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @throws NoSuchElementException if this list is empty
      * @since 1.5
      */
-    public E remove(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         return removeFirst();
     }
 
@@ -736,7 +740,7 @@ public E remove(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @since 1.5
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable LinkedList<E> this, E e) {
         return add(e);
     }
 
@@ -748,7 +752,7 @@ public boolean offer(E e) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @since 1.6
      */
-    public boolean offerFirst(E e) {
+    public boolean offerFirst(@Growable LinkedList<E> this, E e) {
         addFirst(e);
         return true;
     }
@@ -760,7 +764,7 @@ public boolean offerFirst(E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @since 1.6
      */
-    public boolean offerLast(E e) {
+    public boolean offerLast(@Growable LinkedList<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -801,7 +805,7 @@ public boolean offerLast(E e) {
      *     this list is empty
      * @since 1.6
      */
-    public @Nullable E pollFirst(@GuardSatisfied @CanShrink LinkedList<E> this) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
     }
@@ -814,7 +818,7 @@ public boolean offerLast(E e) {
      *     this list is empty
      * @since 1.6
      */
-    public @Nullable E pollLast(@GuardSatisfied @CanShrink LinkedList<E> this) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> l = last;
         return (l == null) ? null : unlinkLast(l);
     }
@@ -828,7 +832,7 @@ public boolean offerLast(E e) {
      * @param e the element to push
      * @since 1.6
      */
-    public void push(@GuardSatisfied LinkedList<E> this, E e) {
+    public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         addFirst(e);
     }
 
@@ -843,7 +847,7 @@ public void push(@GuardSatisfied LinkedList<E> this, E e) {
      * @throws NoSuchElementException if this list is empty
      * @since 1.6
      */
-    public E pop(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         return removeFirst();
     }
 
@@ -856,7 +860,7 @@ public E pop(@GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
      * @return {@code true} if the list contained the specified element
      * @since 1.6
      */
-    public boolean removeFirstOccurrence(@GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return remove(o);
     }
 
@@ -869,7 +873,7 @@ public boolean removeFirstOccurrence(@GuardSatisfied @CanShrink LinkedList<E> th
      * @return {@code true} if the list contained the specified element
      * @since 1.6
      */
-    public boolean removeLastOccurrence(@GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) {
             for (Node<E> x = last; x != null; x = x.prev) {
                 if (x.item == null) {
@@ -909,7 +913,7 @@ public boolean removeLastOccurrence(@GuardSatisfied @CanShrink LinkedList<E> thi
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @see List#listIterator(int)
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty LinkedList<E> this, @NonNegative int index) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedList<E> this, @NonNegative int index) {
         checkPositionIndex(index);
         return new ListItr(index);
     }
@@ -1031,7 +1035,7 @@ private static class Node<E> {
     /**
      * @since 1.6
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty LinkedList<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedList<E> this) {
         return new DescendingIterator();
     }
 
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index c962173e0a53..b9dcca378005 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -30,7 +30,10 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -105,9 +108,9 @@
  * @param <E> the type of elements held in this queue
  */
 @CFComment({"lock/nullness: This class doesn't permits null elements"})
-@AnnotatedFor({"lock", "nullness", "index"})
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
 @SuppressWarnings("unchecked")
-public @Modifiable class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
+public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
     implements java.io.Serializable {
 
     @java.io.Serial
@@ -148,7 +151,7 @@
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public PriorityQueue() {
+    public @Modifiable PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -161,7 +164,7 @@ public PriorityQueue() {
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -174,7 +177,7 @@ public PriorityQueue(@Positive int initialCapacity) {
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -189,7 +192,7 @@ public PriorityQueue(Comparator<? super E> comparator) {
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -215,7 +218,7 @@ public PriorityQueue(@Positive int initialCapacity,
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -246,7 +249,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -264,7 +267,7 @@ public PriorityQueue(PriorityQueue<? extends E> c) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
@@ -331,7 +334,7 @@ private void grow(int minCapacity) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(@GuardSatisfied PriorityQueue<E> this, E e) {
+    public boolean add(@Growable @GuardSatisfied PriorityQueue<E> this, E e) {
         return offer(e);
     }
 
@@ -344,7 +347,7 @@ public boolean add(@GuardSatisfied PriorityQueue<E> this, E e) {
      *         according to the priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable PriorityQueue<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         modCount++;
@@ -382,7 +385,7 @@ private int indexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@GuardSatisfied @CanShrink PriorityQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink PriorityQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         int i = indexOf(o);
         if (i == -1)
             return false;
@@ -494,7 +497,7 @@ public boolean contains(@GuardSatisfied PriorityQueue<E> this, @GuardSatisfied @
      * @return an iterator over the elements in this queue
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty PriorityQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty PriorityQueue<E> this) {
         return new Itr();
     }
 
@@ -594,7 +597,7 @@ public void remove() {
      * Removes all of the elements from this priority queue.
      * The queue will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink PriorityQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityQueue<E> this) {
         modCount++;
         final Object[] es = queue;
         for (int i = 0, n = size; i < n; i++)
@@ -602,7 +605,7 @@ public void clear(@GuardSatisfied @CanShrink PriorityQueue<E> this) {
         size = 0;
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink PriorityQueue<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityQueue<E> this) {
         final Object[] es;
         final E result;
 
@@ -925,7 +928,7 @@ public int characteristics() {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@GuardSatisfied @CanShrink PriorityQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @GuardSatisfied @CanShrink PriorityQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index aa7b3a2a2198..284ae958a655 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -149,8 +149,8 @@
  * @param <E> the type of elements held in this queue
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
-@AnnotatedFor({"lock", "nullness"})
-public @Modifiable interface Queue<E> extends Collection<E> {
+@AnnotatedFor({"lock", "nullness", "modifiability"})
+public interface Queue<E> extends Collection<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do so
      * immediately without violating capacity restrictions, returning
@@ -169,7 +169,7 @@
      *         prevents it from being added to this queue
      */
     @EnsuresNonEmpty("this")
-    boolean add(@GuardSatisfied Queue<E> this, E e);
+    boolean add(@Growable @GuardSatisfied Queue<E> this, E e);
 
     /**
      * Inserts the specified element into this queue if it is possible to do
@@ -188,7 +188,7 @@
      * @throws IllegalArgumentException if some property of this element
      *         prevents it from being added to this queue
      */
-    boolean offer(E e);
+    boolean offer(@Growable Queue<E> this, E e);
 
     /**
      * Retrieves and removes the head of this queue.  This method differs
@@ -198,7 +198,7 @@
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
-    E remove(@GuardSatisfied @NonEmpty @CanShrink Queue<E> this);
+    E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Queue<E> this);
 
     /**
      * Retrieves and removes the head of this queue,
@@ -206,7 +206,7 @@
      *
      * @return the head of this queue, or {@code null} if this queue is empty
      */
-    @Nullable E poll(@GuardSatisfied @CanShrink Queue<E> this);
+    @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink Queue<E> this);
 
     /**
      * Retrieves, but does not remove, the head of this queue.  This method
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 31dca4513aea..aaa8c668f02f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -38,8 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -101,8 +103,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class ArrayBlockingQueue<E extends Object> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ArrayBlockingQueue<E extends Object> extends AbstractQueue<E>
         implements BlockingQueue<E>, java.io.Serializable {
 
     /*
@@ -272,7 +274,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public ArrayBlockingQueue(int capacity) {
+    public @Modifiable ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -286,7 +288,7 @@ public ArrayBlockingQueue(int capacity) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -311,7 +313,7 @@ public ArrayBlockingQueue(int capacity, boolean fair) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
@@ -345,7 +347,7 @@ public ArrayBlockingQueue(int capacity, boolean fair,
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable ArrayBlockingQueue<E> this, E e) {
         return super.add(e);
     }
 
@@ -358,7 +360,7 @@ public boolean add(E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable ArrayBlockingQueue<E> this, E e) {
         Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -381,7 +383,7 @@ public boolean offer(E e) {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public void put(E e) throws InterruptedException {
+    public void put(@Growable ArrayBlockingQueue<E> this, E e) throws InterruptedException {
         Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -402,7 +404,7 @@ public void put(E e) throws InterruptedException {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offer(E e, long timeout, TimeUnit unit)
+    public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
 
         Objects.requireNonNull(e);
@@ -422,7 +424,7 @@ public boolean offer(E e, long timeout, TimeUnit unit)
         }
     }
 
-    public E poll(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -432,7 +434,7 @@ public E poll(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
         }
     }
 
-    public E take(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
@@ -444,7 +446,7 @@ public E take(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws Inte
         }
     }
 
-    public E poll(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -529,7 +531,7 @@ public int remainingCapacity() {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@CanShrink ArrayBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -680,7 +682,7 @@ public String toString() {
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -719,7 +721,7 @@ private static void circularClear(Object[] items, int i, int end) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -729,7 +731,7 @@ public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growa
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -781,7 +783,7 @@ else if (i > take)
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ArrayBlockingQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayBlockingQueue<E> this) {
         return new Itr();
     }
 
@@ -1495,7 +1497,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink ArrayBlockingQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1503,7 +1505,7 @@ public boolean removeIf(@CanShrink ArrayBlockingQueue<E> this, Predicate<? super
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1511,7 +1513,7 @@ public boolean removeAll(@CanShrink ArrayBlockingQueue<E> this, Collection<? ext
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
index 07ed526f0ef8..6003174b0c6c 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
@@ -38,7 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -210,8 +213,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this deque
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<E>, Deque<E> {
+@AnnotatedFor({"nullness", "modifiability"})
+public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<E>, Deque<E> {
     /*
      * We have "diamond" multiple interface inheritance here, and that
      * introduces ambiguities.  Methods might end up with different
@@ -232,7 +235,7 @@
      * @throws NullPointerException if the specified element is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    void addFirst(E e);
+    void addFirst(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -247,7 +250,7 @@
      * @throws NullPointerException if the specified element is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    void addLast(E e);
+    void addLast(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque if it is
@@ -263,7 +266,7 @@
      * @throws NullPointerException if the specified element is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    boolean offerFirst(E e);
+    boolean offerFirst(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -279,7 +282,7 @@
      * @throws NullPointerException if the specified element is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    boolean offerLast(E e);
+    boolean offerLast(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque,
@@ -293,7 +296,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    void putFirst(E e) throws InterruptedException;
+    void putFirst(@Growable BlockingDeque<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element at the end of this deque,
@@ -307,7 +310,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    void putLast(E e) throws InterruptedException;
+    void putLast(@Growable BlockingDeque<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element at the front of this deque,
@@ -328,7 +331,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offerFirst(E e, long timeout, TimeUnit unit)
+    boolean offerFirst(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -350,7 +353,7 @@ boolean offerFirst(E e, long timeout, TimeUnit unit)
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offerLast(E e, long timeout, TimeUnit unit)
+    boolean offerLast(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -360,7 +363,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @return the head of this deque
      * @throws InterruptedException if interrupted while waiting
      */
-    E takeFirst(@CanShrink BlockingDeque<E> this) throws InterruptedException;
+    E takeFirst(@Shrinkable @CanShrink BlockingDeque<E> this) throws InterruptedException;
 
     /**
      * Retrieves and removes the last element of this deque, waiting
@@ -369,7 +372,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @return the tail of this deque
      * @throws InterruptedException if interrupted while waiting
      */
-    E takeLast(@CanShrink BlockingDeque<E> this) throws InterruptedException;
+    E takeLast(@Shrinkable @CanShrink BlockingDeque<E> this) throws InterruptedException;
 
     /**
      * Retrieves and removes the first element of this deque, waiting
@@ -384,7 +387,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      *         waiting time elapses before an element is available
      * @throws InterruptedException if interrupted while waiting
      */
-    @Nullable E pollFirst(@CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
+    @Nullable E pollFirst(@Shrinkable @CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -400,7 +403,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      *         waiting time elapses before an element is available
      * @throws InterruptedException if interrupted while waiting
      */
-    @Nullable E pollLast(@CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
+    @Nullable E pollLast(@Shrinkable @CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -419,7 +422,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException if the specified element is null
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean removeFirstOccurrence(@CanShrink BlockingDeque<E> this, Object o);
+    boolean removeFirstOccurrence(@Shrinkable @CanShrink BlockingDeque<E> this, Object o);
 
     /**
      * Removes the last occurrence of the specified element from this deque.
@@ -437,7 +440,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException if the specified element is null
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean removeLastOccurrence(@CanShrink BlockingDeque<E> this, Object o);
+    boolean removeLastOccurrence(@Shrinkable @CanShrink BlockingDeque<E> this, Object o);
 
     // *** BlockingQueue methods ***
 
@@ -461,7 +464,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
-    boolean add(E e);
+    boolean add(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element into the queue represented by this deque
@@ -481,7 +484,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offer(E e);
+    boolean offer(@Growable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element into the queue represented by this deque
@@ -498,7 +501,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    void put(E e) throws InterruptedException;
+    void put(@Growable BlockingDeque<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element into the queue represented by this deque
@@ -518,7 +521,7 @@ boolean offerLast(E e, long timeout, TimeUnit unit)
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
-    boolean offer(E e, long timeout, TimeUnit unit)
+    boolean offer(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -532,7 +535,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    E remove(@GuardSatisfied @NonEmpty @CanShrink BlockingDeque<E> this);
+    E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink BlockingDeque<E> this);
 
     /**
      * Retrieves and removes the head of the queue represented by this deque
@@ -543,7 +546,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
-    @Nullable E poll(@CanShrink BlockingDeque<E> this);
+    @Nullable E poll(@Shrinkable @CanShrink BlockingDeque<E> this);
 
     /**
      * Retrieves and removes the head of the queue represented by this deque
@@ -555,7 +558,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @return the head of this deque
      * @throws InterruptedException if interrupted while waiting
      */
-    E take(@CanShrink BlockingDeque<E> this) throws InterruptedException;
+    E take(@Shrinkable @CanShrink BlockingDeque<E> this) throws InterruptedException;
 
     /**
      * Retrieves and removes the head of the queue represented by this deque
@@ -569,7 +572,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         specified waiting time elapses before an element is available
      * @throws InterruptedException if interrupted while waiting
      */
-    @Nullable E poll(@CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
+    @Nullable E poll(@Shrinkable @CanShrink BlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -615,7 +618,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException if the specified element is null
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean remove(@CanShrink BlockingDeque<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @CanShrink BlockingDeque<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns {@code true} if this deque contains the specified element.
@@ -649,7 +652,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @return an iterator over the elements in this deque in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty BlockingDeque<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty BlockingDeque<E> this);
 
     // *** Stack methods ***
 
@@ -666,5 +669,5 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException if the specified element is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    void push(E e);
+    void push(@Growable BlockingDeque<E> this, E e);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
index 8561dc415bf0..caaf988881c1 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingQueue.java
@@ -37,8 +37,9 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -189,8 +190,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable interface BlockingQueue<E extends @NonNull Object> extends Queue<E> {
+@AnnotatedFor({"nullness", "modifiability"})
+public interface BlockingQueue<E extends @NonNull Object> extends Queue<E> {
     /**
      * Inserts the specified element into this queue if it is possible to do
      * so immediately without violating capacity restrictions, returning
@@ -210,7 +211,7 @@
      *         element prevents it from being added to this queue
      */
     @EnsuresNonEmpty("this")
-    boolean add(E e);
+    boolean add(@Growable BlockingQueue<E> this, E e);
 
     /**
      * Inserts the specified element into this queue if it is possible to do
@@ -229,7 +230,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    boolean offer(E e);
+    boolean offer(@Growable BlockingQueue<E> this, E e);
 
     /**
      * Inserts the specified element into this queue, waiting if necessary
@@ -243,7 +244,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    void put(E e) throws InterruptedException;
+    void put(@Growable BlockingQueue<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element into this queue, waiting up to the
@@ -263,7 +264,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    boolean offer(E e, long timeout, TimeUnit unit)
+    boolean offer(@Growable BlockingQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -273,7 +274,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @return the head of this queue
      * @throws InterruptedException if interrupted while waiting
      */
-    E take() throws InterruptedException;
+    E take(@Shrinkable BlockingQueue<E> this) throws InterruptedException;
 
     /**
      * Retrieves and removes the head of this queue, waiting up to the
@@ -287,7 +288,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         specified waiting time elapses before an element is available
      * @throws InterruptedException if interrupted while waiting
      */
-    @Nullable E poll(long timeout, TimeUnit unit)
+    @Nullable E poll(@Shrinkable BlockingQueue<E> this, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -321,7 +322,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException if the specified element is null
      * (<a href="{@docRoot}/java.base/java/util/Collection.html#optional-restrictions">optional</a>)
      */
-    boolean remove(@CanShrink BlockingQueue<E> this, @UnknownSignedness Object o);
+    boolean remove(@Shrinkable @CanShrink BlockingQueue<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns {@code true} if this queue contains the specified element.
@@ -363,7 +364,7 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c);
+    int drainTo(@Shrinkable @GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c);
 
     /**
      * Removes at most the given number of available elements from
@@ -388,5 +389,5 @@ boolean offer(E e, long timeout, TimeUnit unit)
      *         queue, or some property of an element of this queue prevents
      *         it from being added to the specified collection
      */
-    int drainTo(@GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements);
+    int drainTo(@Shrinkable @GuardSatisfied @CanShrink BlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 9c390690cc60..3e526a303926 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -38,7 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -112,8 +115,8 @@
  * @author Martin Buchholz
  * @param <E> the type of elements held in this deque
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class ConcurrentLinkedDeque<E extends @NonNull Object>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ConcurrentLinkedDeque<E extends @NonNull Object>
     extends AbstractCollection<E>
     implements Deque<E>, java.io.Serializable {
 
@@ -788,7 +791,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public ConcurrentLinkedDeque() {
+    public @Modifiable ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -801,7 +804,7 @@ public ConcurrentLinkedDeque() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
@@ -843,7 +846,7 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      *
      * @throws NullPointerException if the specified element is null
      */
-    public void addFirst(E e) {
+    public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
     }
 
@@ -856,7 +859,7 @@ public void addFirst(E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
-    public void addLast(E e) {
+    public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
     }
 
@@ -867,7 +870,7 @@ public void addLast(E e) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offerFirst(E e) {
+    public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
         return true;
     }
@@ -881,7 +884,7 @@ public boolean offerFirst(E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offerLast(E e) {
+    public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
         return true;
     }
@@ -932,7 +935,7 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
         return screenNullResult(peekLast());
     }
 
-    public @Nullable E pollFirst(@GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         restart: for (;;) {
             for (Node<E> first = first(), p = first;;) {
                 final E item;
@@ -953,7 +956,7 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
         }
     }
 
-    public @Nullable E pollLast(@GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         restart: for (;;) {
             for (Node<E> last = last(), p = last;;) {
                 final E item;
@@ -977,14 +980,14 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
         return screenNullResult(pollFirst());
     }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeLast(@GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
         return screenNullResult(pollLast());
     }
 
@@ -997,7 +1000,7 @@ public E removeLast(@GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable ConcurrentLinkedDeque<E> this, E e) {
         return offerLast(e);
     }
 
@@ -1010,23 +1013,23 @@ public boolean offer(E e) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
         return offerLast(e);
     }
 
-    public @Nullable E poll(@CanShrink ConcurrentLinkedDeque<E> this)           { return pollFirst(); }
+    public @Nullable E poll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this)           { return pollFirst(); }
     @Pure
     public @Nullable E peek()           { return peekFirst(); }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E remove(@NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)         { return removeFirst(); }
+    public E remove(@Shrinkable @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)         { return removeFirst(); }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E pop(@GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)            { return removeFirst(); }
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)            { return removeFirst(); }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
@@ -1036,7 +1039,7 @@ public boolean add(E e) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public void push(E e)     { addFirst(e); }
+    public void push(@Growable ConcurrentLinkedDeque<E> this, E e)     { addFirst(e); }
 
     /**
      * Removes the first occurrence of the specified element from this deque.
@@ -1050,7 +1053,7 @@ public boolean add(E e) {
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
-    public boolean removeFirstOccurrence(@CanShrink ConcurrentLinkedDeque<E> this, Object o) {
+    public boolean removeFirstOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
         Objects.requireNonNull(o);
         for (Node<E> p = first(); p != null; p = succ(p)) {
             final E item;
@@ -1076,7 +1079,7 @@ public boolean removeFirstOccurrence(@CanShrink ConcurrentLinkedDeque<E> this, O
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
-    public boolean removeLastOccurrence(@CanShrink ConcurrentLinkedDeque<E> this, Object o) {
+    public boolean removeLastOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
         Objects.requireNonNull(o);
         for (Node<E> p = last(); p != null; p = pred(p)) {
             final E item;
@@ -1168,7 +1171,7 @@ public int size() {
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
-    public boolean remove(@CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
 
@@ -1184,7 +1187,7 @@ public boolean remove(@CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied
      *         of its elements are null
      * @throws IllegalArgumentException if the collection is this deque
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable ConcurrentLinkedDeque<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
@@ -1238,7 +1241,7 @@ else if (p.prev == p) // NEXT_TERMINATOR
     /**
      * Removes all of the elements from this deque.
      */
-    public void clear(@GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         while (pollFirst() != null)
             ;
     }
@@ -1371,7 +1374,7 @@ else if (a != null && size <= a.length) {
      * @return an iterator over the elements in this deque in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
         return new Itr();
     }
 
@@ -1385,7 +1388,7 @@ else if (a != null && size <= a.length) {
      *
      * @return an iterator over the elements in this deque in reverse order
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
         return new DescendingItr();
     }
 
@@ -1639,7 +1642,7 @@ private void readObject(java.io.ObjectInputStream s)
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink ConcurrentLinkedDeque<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1647,7 +1650,7 @@ public boolean removeIf(@CanShrink ConcurrentLinkedDeque<E> this, Predicate<? su
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1655,7 +1658,7 @@ public boolean removeAll(@CanShrink ConcurrentLinkedDeque<E> this, Collection<?
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 812618038246..b24e1d8d588d 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -38,7 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -124,8 +127,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class ConcurrentLinkedQueue<E extends @NonNull Object> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class ConcurrentLinkedQueue<E extends @NonNull Object> extends AbstractQueue<E>
         implements Queue<E>, java.io.Serializable {
     private static final long serialVersionUID = 196745693267521676L;
 
@@ -260,7 +263,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public ConcurrentLinkedQueue() {
+    public @Modifiable ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -273,7 +276,7 @@ public ConcurrentLinkedQueue() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
@@ -299,7 +302,7 @@ public ConcurrentLinkedQueue(Collection<? extends E> c) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable ConcurrentLinkedQueue<E> this, E e) {
         return offer(e);
     }
 
@@ -371,7 +374,7 @@ private Node<E> skipDeadNodes(Node<E> pred, Node<E> c, Node<E> p, Node<E> q) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable ConcurrentLinkedQueue<E> this, E e) {
         final Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
 
         for (Node<E> t = tail, p = t;;) {
@@ -400,7 +403,7 @@ else if (p == q)
         }
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
         restartFromHead: for (;;) {
             for (Node<E> h = head, p = h, q;; p = q) {
                 final E item;
@@ -544,7 +547,7 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         if (o == null) return false;
         restartFromHead: for (;;) {
             for (Node<E> p = head, pred = null; p != null; ) {
@@ -580,7 +583,7 @@ public boolean remove(@CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied
      *         of its elements are null
      * @throws IllegalArgumentException if the collection is this queue
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable ConcurrentLinkedQueue<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
@@ -754,7 +757,7 @@ else if (a != null && size <= a.length) {
      * @return an iterator over the elements in this queue in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty ConcurrentLinkedQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedQueue<E> this) {
         return new Itr();
     }
 
@@ -992,7 +995,7 @@ public Spliterator<E> spliterator() {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink ConcurrentLinkedQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1000,7 +1003,7 @@ public boolean removeIf(@CanShrink ConcurrentLinkedQueue<E> this, Predicate<? su
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1008,12 +1011,12 @@ public boolean removeAll(@CanShrink ConcurrentLinkedQueue<E> this, Collection<?
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
-    public void clear(@GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
         bulkRemove(e -> true);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 09d38a174dfd..485450ec1dee 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -35,8 +35,10 @@
 
 package java.util.concurrent;
 
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -115,8 +117,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     implements BlockingQueue<E> {
 
     private final transient ReentrantLock lock = new ReentrantLock();
@@ -150,7 +152,7 @@
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public DelayQueue() {}
+    public @Modifiable DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -160,7 +162,7 @@ public DelayQueue() {}
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public DelayQueue(Collection<? extends E> c) {
+    public @Modifiable DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
@@ -172,7 +174,7 @@ public DelayQueue(Collection<? extends E> c) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable DelayQueue<E> this, E e) {
         return offer(e);
     }
 
@@ -183,7 +185,7 @@ public boolean add(E e) {
      * @return {@code true}
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable DelayQueue<E> this, E e) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -205,7 +207,7 @@ public boolean offer(E e) {
      * @param e the element to add
      * @throws NullPointerException {@inheritDoc}
      */
-    public void put(E e) {
+    public void put(@Growable DelayQueue<E> this, E e) {
         offer(e);
     }
 
@@ -219,7 +221,7 @@ public void put(E e) {
      * @return {@code true}
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offer(E e, long timeout, TimeUnit unit) {
+    public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit unit) {
         return offer(e);
     }
 
@@ -231,7 +233,7 @@ public boolean offer(E e, long timeout, TimeUnit unit) {
      * @return the <em>expired head</em> of this queue, or {@code null} if this
      *         queue has no elements with an expired delay
      */
-    public @Nullable E poll(@GuardSatisfied @CanShrink DelayQueue<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -252,7 +254,7 @@ public boolean offer(E e, long timeout, TimeUnit unit) {
      * @return the <em>expired head</em> of this queue
      * @throws InterruptedException {@inheritDoc}
      */
-    public E take(@GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
@@ -297,7 +299,7 @@ public E take(@GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedE
      *         an expired delay becomes available
      * @throws InterruptedException {@inheritDoc}
      */
-    public @Nullable E poll(@GuardSatisfied @CanShrink DelayQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -347,7 +349,7 @@ public E take(@GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedE
      * @throws NoSuchElementException if this queue has no elements with an
      *         expired delay
      */
-    public E remove() {
+    public E remove(@Shrinkable DelayQueue<E> this) {
         return super.remove();
     }
 
@@ -388,7 +390,7 @@ public int size() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -398,7 +400,7 @@ public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Coll
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -428,7 +430,7 @@ public int drainTo(@GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Coll
      * Elements with an unexpired delay are not waited for; they are
      * simply discarded from the queue.
      */
-    public void clear(@GuardSatisfied @CanShrink DelayQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -522,7 +524,7 @@ public int remainingCapacity() {
      * Removes a single instance of the specified element from this
      * queue, if it is present, whether or not it has expired.
      */
-    public boolean remove(@CanShrink DelayQueue<E> this, @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink DelayQueue<E> this, @UnknownSignedness Object o) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -561,7 +563,7 @@ void removeEQ(Object o) {
      * @return an iterator over the elements in this queue
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty DelayQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty DelayQueue<E> this) {
         return new Itr(toArray());
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index d640e732d39c..cd6a48a92b7a 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -38,8 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -93,8 +95,8 @@
  * @author  Doug Lea
  * @param <E> the type of elements held in this deque
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class LinkedBlockingDeque<E extends Object>
+@AnnotatedFor({"nullness", "modifiability"})
+public class LinkedBlockingDeque<E extends Object>
     extends AbstractQueue<E>
     implements BlockingDeque<E>, java.io.Serializable {
 
@@ -189,7 +191,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public LinkedBlockingDeque() {
+    public @Modifiable LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -199,7 +201,7 @@ public LinkedBlockingDeque() {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public LinkedBlockingDeque(int capacity) {
+    public @Modifiable LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -214,7 +216,7 @@ public LinkedBlockingDeque(int capacity) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
@@ -333,7 +335,7 @@ void unlink(@CanShrink LinkedBlockingDeque<E> this, Node<E> x) {
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException {@inheritDoc}
      */
-    public void addFirst(E e) {
+    public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
         if (!offerFirst(e))
             throw new IllegalStateException("Deque full");
     }
@@ -342,7 +344,7 @@ public void addFirst(E e) {
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException  {@inheritDoc}
      */
-    public void addLast(E e) {
+    public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
         if (!offerLast(e))
             throw new IllegalStateException("Deque full");
     }
@@ -350,7 +352,7 @@ public void addLast(E e) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offerFirst(E e) {
+    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -365,7 +367,7 @@ public boolean offerFirst(E e) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offerLast(E e) {
+    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -381,7 +383,7 @@ public boolean offerLast(E e) {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public void putFirst(E e) throws InterruptedException {
+    public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -398,7 +400,7 @@ public void putFirst(E e) throws InterruptedException {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public void putLast(E e) throws InterruptedException {
+    public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -415,7 +417,7 @@ public void putLast(E e) throws InterruptedException {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public boolean offerFirst(E e, long timeout, TimeUnit unit)
+    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -438,7 +440,7 @@ public boolean offerFirst(E e, long timeout, TimeUnit unit)
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public boolean offerLast(E e, long timeout, TimeUnit unit)
+    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -460,7 +462,7 @@ public boolean offerLast(E e, long timeout, TimeUnit unit)
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         E x = pollFirst();
         if (x == null) throw new NoSuchElementException();
         return x;
@@ -469,13 +471,13 @@ public E removeFirst(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E>
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E removeLast(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         E x = pollLast();
         if (x == null) throw new NoSuchElementException();
         return x;
     }
 
-    public @Nullable E pollFirst(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -485,7 +487,7 @@ public E removeLast(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E>
         }
     }
 
-    public @Nullable E pollLast(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -495,7 +497,7 @@ public E removeLast(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E>
         }
     }
 
-    public E takeFirst(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+    public E takeFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -508,7 +510,7 @@ public E takeFirst(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throw
         }
     }
 
-    public E takeLast(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+    public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -521,7 +523,7 @@ public E takeLast(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws
         }
     }
 
-    public @Nullable E pollFirst(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
@@ -539,7 +541,7 @@ public E takeLast(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws
         }
     }
 
-    public @Nullable E pollLast(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
@@ -597,7 +599,7 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
         }
     }
 
-    public boolean removeFirstOccurrence(@CanShrink LinkedBlockingDeque<E> this, Object o) {
+    public boolean removeFirstOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -614,7 +616,7 @@ public boolean removeFirstOccurrence(@CanShrink LinkedBlockingDeque<E> this, Obj
         }
     }
 
-    public boolean removeLastOccurrence(@CanShrink LinkedBlockingDeque<E> this, Object o) {
+    public boolean removeLastOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -644,7 +646,7 @@ public boolean removeLastOccurrence(@CanShrink LinkedBlockingDeque<E> this, Obje
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable LinkedBlockingDeque<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -652,7 +654,7 @@ public boolean add(E e) {
     /**
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable LinkedBlockingDeque<E> this, E e) {
         return offerLast(e);
     }
 
@@ -660,7 +662,7 @@ public boolean offer(E e) {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public void put(E e) throws InterruptedException {
+    public void put(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         putLast(e);
     }
 
@@ -668,7 +670,7 @@ public void put(E e) throws InterruptedException {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
-    public boolean offer(E e, long timeout, TimeUnit unit)
+    public boolean offer(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         return offerLast(e, timeout, unit);
     }
@@ -683,19 +685,19 @@ public boolean offer(E e, long timeout, TimeUnit unit)
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
-    public E remove(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         return removeFirst();
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         return pollFirst();
     }
 
-    public E take(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         return takeFirst();
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         return pollFirst(timeout, unit);
     }
 
@@ -745,7 +747,7 @@ public int remainingCapacity() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -755,7 +757,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Grow
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -781,14 +783,14 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Grow
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException {@inheritDoc}
      */
-    public void push(E e) {
+    public void push(@Growable LinkedBlockingDeque<E> this, E e) {
         addFirst(e);
     }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    public E pop(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         return removeFirst();
     }
 
@@ -808,7 +810,7 @@ public E pop(@GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
      * @param o element to be removed from this deque, if present
      * @return {@code true} if this deque changed as a result of the call
      */
-    public boolean remove(@CanShrink LinkedBlockingDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
 
@@ -866,7 +868,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @throws IllegalStateException if this deque is full
      * @see #add(Object)
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable LinkedBlockingDeque<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
@@ -1003,7 +1005,7 @@ public String toString() {
      * Atomically removes all of the elements from this deque.
      * The deque will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -1043,7 +1045,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this deque in proper sequence
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
         return new Itr();
     }
 
@@ -1057,7 +1059,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this deque in reverse order
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
         return new DescendingItr();
     }
 
@@ -1359,7 +1361,7 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink LinkedBlockingDeque<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1367,7 +1369,7 @@ public boolean removeIf(@CanShrink LinkedBlockingDeque<E> this, Predicate<? supe
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1375,7 +1377,7 @@ public boolean removeAll(@CanShrink LinkedBlockingDeque<E> this, Collection<? ex
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 82f002fa2f12..9e893c436bda 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -38,8 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -95,8 +97,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class LinkedBlockingQueue<E extends Object> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class LinkedBlockingQueue<E extends Object> extends AbstractQueue<E>
         implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -6903933977591709194L;
 
@@ -259,7 +261,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public LinkedBlockingQueue() {
+    public @Modifiable LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -270,7 +272,7 @@ public LinkedBlockingQueue() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public LinkedBlockingQueue(int capacity) {
+    public @Modifiable LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -286,7 +288,7 @@ public LinkedBlockingQueue(int capacity) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
@@ -342,7 +344,7 @@ public int remainingCapacity() {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public void put(E e) throws InterruptedException {
+    public void put(@Growable LinkedBlockingQueue<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         final int c;
         final Node<E> node = new Node<E>(e);
@@ -381,7 +383,7 @@ public void put(E e) throws InterruptedException {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offer(E e, long timeout, TimeUnit unit)
+    public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
 
         if (e == null) throw new NullPointerException();
@@ -419,7 +421,7 @@ public boolean offer(E e, long timeout, TimeUnit unit)
      *
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable LinkedBlockingQueue<E> this, E e) {
         if (e == null) throw new NullPointerException();
         final AtomicInteger count = this.count;
         if (count.get() == capacity)
@@ -443,7 +445,7 @@ public boolean offer(E e) {
         return true;
     }
 
-    public E take(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws InterruptedException {
         final E x;
         final int c;
         final AtomicInteger count = this.count;
@@ -465,7 +467,7 @@ public E take(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws Int
         return x;
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         final E x;
         final int c;
         long nanos = unit.toNanos(timeout);
@@ -490,7 +492,7 @@ public E take(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws Int
         return x;
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
         final AtomicInteger count = this.count;
         if (count.get() == 0)
             return null;
@@ -554,7 +556,7 @@ void unlink(Node<E> p, Node<E> pred) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@CanShrink LinkedBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         fullyLock();
         try {
@@ -685,7 +687,7 @@ public String toString() {
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
         fullyLock();
         try {
             for (Node<E> p, h = head; (p = h.next) != null; h = p) {
@@ -707,7 +709,7 @@ public void clear(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -717,7 +719,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Grow
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -777,7 +779,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty LinkedBlockingQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingQueue<E> this) {
         return new Itr();
     }
 
@@ -1042,7 +1044,7 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink LinkedBlockingQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1050,7 +1052,7 @@ public boolean removeIf(@CanShrink LinkedBlockingQueue<E> this, Predicate<? supe
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1058,7 +1060,7 @@ public boolean removeAll(@CanShrink LinkedBlockingQueue<E> this, Collection<? ex
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 88f512bfbaac..155309aa74a8 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -38,8 +38,11 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -105,7 +108,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-public @Modifiable class LinkedTransferQueue<E> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class LinkedTransferQueue<E> extends AbstractQueue<E>
     implements TransferQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -3223113410248163686L;
 
@@ -1170,7 +1174,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public LinkedTransferQueue() {
+    public @Modifiable LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1183,7 +1187,7 @@ public LinkedTransferQueue() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
@@ -1204,7 +1208,7 @@ public LinkedTransferQueue(Collection<? extends E> c) {
      *
      * @throws NullPointerException if the specified element is null
      */
-    public void put(E e) {
+    public void put(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
     }
 
@@ -1217,7 +1221,7 @@ public void put(E e) {
      *  {@link BlockingQueue#offer(Object,long,TimeUnit) BlockingQueue.offer})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e, long timeout, TimeUnit unit) {
+    public boolean offer(@Growable LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit) {
         xfer(e, true, ASYNC, 0L);
         return true;
     }
@@ -1229,7 +1233,7 @@ public boolean offer(E e, long timeout, TimeUnit unit) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
         return true;
     }
@@ -1243,7 +1247,7 @@ public boolean offer(E e) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
         return true;
     }
@@ -1258,7 +1262,7 @@ public boolean add(E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
-    public boolean tryTransfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {
+    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {
         return xfer(e, true, NOW, 0L) == null;
     }
 
@@ -1273,7 +1277,7 @@ public boolean tryTransfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> thi
      *
      * @throws NullPointerException if the specified element is null
      */
-    public void transfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
+    public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
         if (xfer(e, true, SYNC, 0L) != null) {
             Thread.interrupted(); // failure possible only due to interrupt
             throw new InterruptedException();
@@ -1294,7 +1298,7 @@ public void transfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e
      *
      * @throws NullPointerException if the specified element is null
      */
-    public boolean tryTransfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit)
+    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (xfer(e, true, TIMED, unit.toNanos(timeout)) == null)
             return true;
@@ -1303,7 +1307,7 @@ public boolean tryTransfer(@GuardSatisfied @CanShrink LinkedTransferQueue<E> thi
         throw new InterruptedException();
     }
 
-    public E take(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
         E e = xfer(null, false, SYNC, 0L);
         if (e != null)
             return e;
@@ -1311,14 +1315,14 @@ public E take(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws Int
         throw new InterruptedException();
     }
 
-    public E poll(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = xfer(null, false, TIMED, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;
         throw new InterruptedException();
     }
 
-    public E poll(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
         return xfer(null, false, NOW, 0L);
     }
 
@@ -1326,7 +1330,7 @@ public E poll(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1340,7 +1344,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Grow
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1359,7 +1363,7 @@ public int drainTo(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Grow
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty LinkedTransferQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedTransferQueue<E> this) {
         return new Itr();
     }
 
@@ -1443,7 +1447,7 @@ public int getWaitingConsumerCount() {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@CanShrink LinkedTransferQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink LinkedTransferQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         restartFromHead: for (;;) {
             for (Node p = head, pred = null; p != null; ) {
@@ -1563,7 +1567,7 @@ private void readObject(java.io.ObjectInputStream s)
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink LinkedTransferQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1571,7 +1575,7 @@ public boolean removeIf(@CanShrink LinkedTransferQueue<E> this, Predicate<? supe
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1579,12 +1583,12 @@ public boolean removeAll(@CanShrink LinkedTransferQueue<E> this, Collection<? ex
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
-    public void clear(@GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
         bulkRemove(e -> true);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index 63083ab15d7a..e222ab85608a 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -38,8 +38,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -129,9 +131,9 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
+@AnnotatedFor({"nullness", "modifiability"})
 @SuppressWarnings("unchecked")
-public @Modifiable class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
+public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
     implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = 5595510919245408276L;
 
@@ -205,7 +207,7 @@
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public PriorityBlockingQueue() {
+    public @Modifiable PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -218,7 +220,7 @@ public PriorityBlockingQueue() {
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -234,7 +236,7 @@ public PriorityBlockingQueue(int initialCapacity) {
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -258,7 +260,7 @@ public PriorityBlockingQueue(int initialCapacity,
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {
@@ -465,7 +467,7 @@ private void heapify() {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable PriorityBlockingQueue<E> this, E e) {
         return offer(e);
     }
 
@@ -480,7 +482,7 @@ public boolean add(E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         final ReentrantLock lock = this.lock;
@@ -513,7 +515,7 @@ public boolean offer(E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
-    public void put(E e) {
+    public void put(@Growable PriorityBlockingQueue<E> this, E e) {
         offer(e); // never need to block
     }
 
@@ -532,11 +534,11 @@ public void put(E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e, long timeout, TimeUnit unit) {
+    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e, long timeout, TimeUnit unit) {
         return offer(e); // never need to block
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -546,7 +548,7 @@ public boolean offer(E e, long timeout, TimeUnit unit) {
         }
     }
 
-    public E take(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         E result;
@@ -559,7 +561,7 @@ public E take(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws I
         return result;
     }
 
-    public @Nullable E poll(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -664,7 +666,7 @@ private void removeAt(int i) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
-    public boolean remove(@CanShrink PriorityBlockingQueue<E> this, @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, @Nullable @UnknownSignedness Object o) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -729,7 +731,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
 
@@ -739,7 +741,7 @@ public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Gr
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -763,7 +765,7 @@ public int drainTo(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Gr
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -861,7 +863,7 @@ public void clear(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
      *
      * @return an iterator over the elements in this queue
      */
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty PriorityBlockingQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty PriorityBlockingQueue<E> this) {
         return new Itr(toArray());
     }
 
@@ -1035,7 +1037,7 @@ public Spliterator<E> spliterator() {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink PriorityBlockingQueue<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -1043,7 +1045,7 @@ public boolean removeIf(@CanShrink PriorityBlockingQueue<E> this, Predicate<? su
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeAll(@CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -1051,7 +1053,7 @@ public boolean removeAll(@CanShrink PriorityBlockingQueue<E> this, Collection<?
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index 236aea0d1ffd..fb83b03584e7 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -39,8 +39,10 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.NonNull;
@@ -103,8 +105,8 @@
  * @author Doug Lea and Bill Scherer and Michael Scott
  * @param <E> the type of elements held in this queue
  */
-@AnnotatedFor({"nullness"})
-public @Modifiable class SynchronousQueue<E extends @NonNull Object> extends AbstractQueue<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class SynchronousQueue<E extends @NonNull Object> extends AbstractQueue<E>
     implements BlockingQueue<E>, java.io.Serializable {
     private static final long serialVersionUID = -3223113410248163686L;
 
@@ -830,7 +832,7 @@ void clean(QNode pred, QNode s) {
     /**
      * Creates a {@code SynchronousQueue} with nonfair access policy.
      */
-    public SynchronousQueue() {
+    public @Modifiable SynchronousQueue() {
         this(false);
     }
 
@@ -840,7 +842,7 @@ public SynchronousQueue() {
      * @param fair if true, waiting threads contend in FIFO order for
      *        access; otherwise the order is unspecified.
      */
-    public SynchronousQueue(boolean fair) {
+    public @Modifiable SynchronousQueue(boolean fair) {
         transferer = fair ? new TransferQueue<E>() : new TransferStack<E>();
     }
 
@@ -851,7 +853,7 @@ public SynchronousQueue(boolean fair) {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public void put(E e) throws InterruptedException {
+    public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         if (transferer.transfer(e, false, 0) == null) {
             Thread.interrupted();
@@ -868,7 +870,7 @@ public void put(E e) throws InterruptedException {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean offer(E e, long timeout, TimeUnit unit)
+    public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
         if (transferer.transfer(e, true, unit.toNanos(timeout)) != null)
@@ -887,7 +889,7 @@ public boolean offer(E e, long timeout, TimeUnit unit)
      *         {@code false}
      * @throws NullPointerException if the specified element is null
      */
-    public boolean offer(E e) {
+    public boolean offer(@Growable SynchronousQueue<E> this, E e) {
         if (e == null) throw new NullPointerException();
         return transferer.transfer(e, true, 0) != null;
     }
@@ -899,7 +901,7 @@ public boolean offer(E e) {
      * @return the head of this queue
      * @throws InterruptedException {@inheritDoc}
      */
-    public E take(@GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {
+    public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {
         E e = transferer.transfer(null, false, 0);
         if (e != null)
             return e;
@@ -916,7 +918,7 @@ public E take(@GuardSatisfied @CanShrink SynchronousQueue<E> this) throws Interr
      *         specified waiting time elapses before an element is present
      * @throws InterruptedException {@inheritDoc}
      */
-    public E poll(@GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = transferer.transfer(null, true, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;
@@ -930,7 +932,7 @@ public E poll(@GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout,
      * @return the head of this queue, or {@code null} if no
      *         element is available
      */
-    public E poll(@GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
         return transferer.transfer(null, true, 0);
     }
 
@@ -971,7 +973,7 @@ public int remainingCapacity() {
      * Does nothing.
      * A {@code SynchronousQueue} has no internal capacity.
      */
-    public void clear(@GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
     }
 
     /**
@@ -994,7 +996,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @param o the element to remove
      * @return {@code false}
      */
-    public boolean remove(@CanShrink SynchronousQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink SynchronousQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return false;
     }
 
@@ -1017,7 +1019,7 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      * @param c the collection
      * @return {@code false}
      */
-    public boolean removeAll(@CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return false;
     }
 
@@ -1028,7 +1030,7 @@ public boolean removeAll(@CanShrink SynchronousQueue<E> this, Collection<? exten
      * @param c the collection
      * @return {@code false}
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return false;
     }
 
@@ -1051,7 +1053,7 @@ public E peek() {
      * @return an empty iterator
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty SynchronousQueue<E> this) {
+    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty SynchronousQueue<E> this) {
         return Collections.emptyIterator();
     }
 
@@ -1105,7 +1107,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1121,7 +1123,7 @@ public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growabl
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
-    public int drainTo(@GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/concurrent/TransferQueue.java b/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
index 847c1a0bb73d..44db151f8bc9 100644
--- a/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/TransferQueue.java
@@ -35,7 +35,9 @@
 
 package java.util.concurrent;
 
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 /**
  * A {@link BlockingQueue} in which producers may wait for consumers
@@ -67,7 +69,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this queue
  */
-public @Modifiable interface TransferQueue<E> extends BlockingQueue<E> {
+@AnnotatedFor({"nullness", "modifiability"})
+public interface TransferQueue<E> extends BlockingQueue<E> {
     /**
      * Transfers the element to a waiting consumer immediately, if possible.
      *
@@ -85,7 +88,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    boolean tryTransfer(E e);
+    boolean tryTransfer(@Growable TransferQueue<E> this, E e);
 
     /**
      * Transfers the element to a consumer, waiting if necessary to do so.
@@ -104,7 +107,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    void transfer(E e) throws InterruptedException;
+    void transfer(@Growable TransferQueue<E> this, E e) throws InterruptedException;
 
     /**
      * Transfers the element to a consumer if it is possible to do so
@@ -133,7 +136,7 @@
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this queue
      */
-    boolean tryTransfer(E e, long timeout, TimeUnit unit)
+    boolean tryTransfer(@Growable TransferQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**

From 0f42bb1997507005cdb8003f980f8a40bdc1da87 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yangyihan121@gmail.com>
Date: Sun, 22 Mar 2026 22:38:12 -0700
Subject: [PATCH 040/119] annotated last two files.

---
 .../util/concurrent/CopyOnWriteArrayList.java | 56 ++++++++++---------
 .../util/concurrent/CopyOnWriteArraySet.java  | 24 ++++----
 2 files changed, 45 insertions(+), 35 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index 675648288395..137c3083f196 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -37,7 +37,11 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -52,6 +56,7 @@
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.lang.invoke.VarHandle;
 import java.lang.reflect.Field;
@@ -115,7 +120,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this list
  */
-public @Modifiable class CopyOnWriteArrayList<E>
+@AnnotatedFor("modifiability")
+public class CopyOnWriteArrayList<E>
     implements List<E>, RandomAccess, Cloneable, java.io.Serializable {
     private static final long serialVersionUID = 8673264195747942595L;
 
@@ -146,7 +152,7 @@ final void setArray(Object[] a) {
     /**
      * Creates an empty list.
      */
-    public CopyOnWriteArrayList() {
+    public @Modifiable CopyOnWriteArrayList() {
         setArray(new Object[0]);
     }
 
@@ -158,7 +164,7 @@ public CopyOnWriteArrayList() {
      * @param c the collection of initially held elements
      * @throws NullPointerException if the specified collection is null
      */
-    public CopyOnWriteArrayList(Collection<? extends E> c) {
+    public @Modifiable CopyOnWriteArrayList(Collection<? extends E> c) {
         Object[] es;
         if (c.getClass() == CopyOnWriteArrayList.class)
             es = ((CopyOnWriteArrayList<?>)c).getArray();
@@ -177,7 +183,7 @@ public CopyOnWriteArrayList(Collection<? extends E> c) {
      *        internal array)
      * @throws NullPointerException if the specified array is null
      */
-    public CopyOnWriteArrayList(E[] toCopyIn) {
+    public @Modifiable CopyOnWriteArrayList(E[] toCopyIn) {
         setArray(Arrays.copyOf(toCopyIn, toCopyIn.length, Object[].class));
     }
 
@@ -461,7 +467,7 @@ public E getLast() {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public E set(int index, E element) {
+    public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
         synchronized (lock) {
             Object[] es = getArray();
             E oldValue = elementAt(es, index);
@@ -483,7 +489,7 @@ public E set(int index, E element) {
      * @return {@code true} (as specified by {@link Collection#add})
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -501,7 +507,7 @@ public boolean add(E e) {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public void add(int index, E element) {
+    public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -527,7 +533,7 @@ public void add(int index, E element) {
      *
      * @since 21
      */
-    public void addFirst(E e) {
+    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
         add(0, e);
     }
 
@@ -536,7 +542,7 @@ public void addFirst(E e) {
      *
      * @since 21
      */
-    public void addLast(E e) {
+    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
         synchronized (lock) {
             add(getArray().length, e);
         }
@@ -549,7 +555,7 @@ public void addLast(E e) {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public E remove(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -575,7 +581,7 @@ public E remove(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int ind
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeFirst() {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             if (getArray().length == 0)
                 throw new NoSuchElementException();
@@ -590,7 +596,7 @@ public E removeFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
-    public E removeLast() {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             int size = getArray().length;
             if (size == 0)
@@ -612,7 +618,7 @@ public E removeLast() {
      * @param o element to be removed from this list, if present
      * @return {@code true} if this list contained the specified element
      */
-    public boolean remove(@CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         Object[] snapshot = getArray();
         int index = indexOfRange(o, snapshot, 0, snapshot.length);
         return index >= 0 && remove(o, snapshot, index);
@@ -692,7 +698,7 @@ void removeRange(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int fr
      * @param e element to be added to this list, if absent
      * @return {@code true} if the element was added
      */
-    public boolean addIfAbsent(E e) {
+    public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {
         Object[] snapshot = getArray();
         return indexOfRange(e, snapshot, 0, snapshot.length) < 0
             && addIfAbsent(e, snapshot);
@@ -760,7 +766,7 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    public boolean removeAll(@CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
@@ -781,7 +787,7 @@ public boolean removeAll(@CanShrink CopyOnWriteArrayList<E> this, Collection<? e
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    public boolean retainAll(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
@@ -797,7 +803,7 @@ public boolean retainAll(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this
      * @throws NullPointerException if the specified collection is null
      * @see #addIfAbsent(Object)
      */
-    public int addAllAbsent(Collection<? extends E> c) {
+    public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
         Object[] cs = c.toArray();
         if (c.getClass() != ArrayList.class) {
             cs = cs.clone();
@@ -828,7 +834,7 @@ public int addAllAbsent(Collection<? extends E> c) {
      * Removes all of the elements from this list.
      * The list will be empty after this call returns.
      */
-    public void clear(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             setArray(new Object[0]);
         }
@@ -844,7 +850,7 @@ public void clear(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
      * @throws NullPointerException if the specified collection is null
      * @see #add(Object)
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
         Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
             ((CopyOnWriteArrayList<?>)c).getArray() : c.toArray();
         if (cs.length == 0)
@@ -881,7 +887,7 @@ public boolean addAll(Collection<? extends E> c) {
      * @throws NullPointerException if the specified collection is null
      * @see #add(int,Object)
      */
-    public boolean addAll(int index, Collection<? extends E> c) {
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {
         Object[] cs = c.toArray();
         synchronized (lock) {
             Object[] es = getArray();
@@ -921,7 +927,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(@CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
@@ -978,7 +984,7 @@ boolean bulkRemove(Predicate<? super E> filter, int i, int end) {
         }
     }
 
-    public void replaceAll(UnaryOperator<E> operator) {
+    public void replaceAll(@Replaceable CopyOnWriteArrayList<E> this, UnaryOperator<E> operator) {
         synchronized (lock) {
             replaceAllRange(operator, 0, getArray().length);
         }
@@ -993,7 +999,7 @@ void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
         setArray(es);
     }
 
-    public void sort(Comparator<? super E> c) {
+    public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {
         synchronized (lock) {
             sortRange(c, 0, getArray().length);
         }
@@ -1287,7 +1293,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      * @return a view of the specified range within this list
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink List<E> subList(@PolyGrowShrink CopyOnWriteArrayList<E> this, int fromIndex, int toIndex) {
+    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @PolyGrowShrink CopyOnWriteArrayList<E> this, int fromIndex, int toIndex) {
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -1777,7 +1783,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      *
      * @since 21
      */
-    public List<E> reversed() {
+    public @PolyModifiable @PolyGrowShrink List<E> reversed(@PolyModifiable @PolyGrowShrink CopyOnWriteArrayList<E> this) {
         return new Reversed<>(this, lock);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
index 1a9ff75c0c03..f2a816bad2c0 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
@@ -37,7 +37,9 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -51,6 +53,7 @@
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.util.AbstractSet;
 import java.util.Collection;
@@ -112,7 +115,8 @@
  * @author Doug Lea
  * @param <E> the type of elements held in this set
  */
-public @Modifiable class CopyOnWriteArraySet<E> extends AbstractSet<E>
+@AnnotatedFor({"nullness", "modifiability"})
+public class CopyOnWriteArraySet<E> extends AbstractSet<E>
         implements java.io.Serializable {
     private static final long serialVersionUID = 5457747651344034263L;
 
@@ -121,7 +125,7 @@
     /**
      * Creates an empty set.
      */
-    public CopyOnWriteArraySet() {
+    public @Modifiable CopyOnWriteArraySet() {
         al = new CopyOnWriteArrayList<E>();
     }
 
@@ -132,7 +136,7 @@ public CopyOnWriteArraySet() {
      * @param c the collection of elements to initially contain
      * @throws NullPointerException if the specified collection is null
      */
-    public CopyOnWriteArraySet(Collection<? extends E> c) {
+    public @Modifiable CopyOnWriteArraySet(Collection<? extends E> c) {
         if (c.getClass() == CopyOnWriteArraySet.class) {
             @SuppressWarnings("unchecked") CopyOnWriteArraySet<E> cc =
                 (CopyOnWriteArraySet<E>)c;
@@ -248,7 +252,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * Removes all of the elements from this set.
      * The set will be empty after this call returns.
      */
-    public void clear() {
+    public void clear(@Shrinkable CopyOnWriteArraySet<E> this) {
         al.clear();
     }
 
@@ -263,7 +267,7 @@ public void clear() {
      * @param o object to be removed from this set, if present
      * @return {@code true} if this set contained the specified element
      */
-    public boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
+    public boolean remove(@Shrinkable CopyOnWriteArraySet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return al.remove(o);
     }
 
@@ -280,7 +284,7 @@ public boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      *         element
      */
     @EnsuresNonEmpty("this")
-    public boolean add(E e) {
+    public boolean add(@Growable CopyOnWriteArraySet<E> this, E e) {
         return al.addIfAbsent(e);
     }
 
@@ -350,7 +354,7 @@ private static int compareSets(Object[] snapshot, Set<?> set) {
      * @throws NullPointerException if the specified collection is null
      * @see #add(Object)
      */
-    public boolean addAll(Collection<? extends E> c) {
+    public boolean addAll(@Growable CopyOnWriteArraySet<E> this, Collection<? extends E> c) {
         return al.addAllAbsent(c) > 0;
     }
 
@@ -371,7 +375,7 @@ public boolean addAll(Collection<? extends E> c) {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean removeAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         return al.removeAll(c);
     }
 
@@ -394,7 +398,7 @@ public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object
      *         or if the specified collection is null
      * @see #remove(Object)
      */
-    public boolean retainAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         return al.retainAll(c);
     }
 
@@ -440,7 +444,7 @@ public boolean equals(@Nullable Object o) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
-    public boolean removeIf(Predicate<? super E> filter) {
+    public boolean removeIf(@Shrinkable CopyOnWriteArraySet<E> this, Predicate<? super E> filter) {
         return al.removeIf(filter);
     }
 

From d57124332abb37ca60b31d940ebe6f9eef45dd84 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Tue, 7 Apr 2026 23:08:25 -0700
Subject: [PATCH 041/119] for modifiable collection, annotated clone to return
 modifiable object; annotated EnumSet.java

---
 .../share/classes/java/util/ArrayDeque.java   |  2 +-
 .../share/classes/java/util/ArrayList.java    |  2 +-
 .../share/classes/java/util/EnumMap.java      |  2 +-
 .../share/classes/java/util/EnumSet.java      | 39 ++++++++++---------
 .../share/classes/java/util/HashMap.java      |  2 +-
 .../share/classes/java/util/HashSet.java      |  2 +-
 .../share/classes/java/util/Hashtable.java    |  2 +-
 .../classes/java/util/IdentityHashMap.java    |  2 +-
 .../share/classes/java/util/LinkedList.java   |  2 +-
 .../share/classes/java/util/TreeMap.java      |  2 +-
 .../share/classes/java/util/TreeSet.java      |  2 +-
 .../share/classes/java/util/Vector.java       |  2 +-
 .../concurrent/ConcurrentSkipListMap.java     |  2 +-
 .../concurrent/ConcurrentSkipListSet.java     |  2 +-
 .../util/concurrent/CopyOnWriteArrayList.java |  2 +-
 15 files changed, 35 insertions(+), 32 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 3694f82a9888..6e449bd96484 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -1187,7 +1187,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 95dde7c1a067..14d142ece091 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -377,7 +377,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public Object clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable Object clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 1c90d30c7876..b02d5e6e6c13 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -792,7 +792,7 @@ private int entryHashCode(int index) {
      * @return a shallow copy of this enum map
      */
     @SuppressWarnings("unchecked")
-    public EnumMap<K, V> clone() {
+    public @Modifiable EnumMap<K, V> clone() {
         EnumMap<K, V> result = null;
         try {
             result = (EnumMap<K, V>) super.clone();
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index 9a64d87cbe7f..bb0d6f2085f2 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -25,6 +25,9 @@
 
 package java.util;
 
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
@@ -81,7 +84,7 @@
  * @since 1.5
  * @see EnumMap
  */
-@AnnotatedFor({"nullness", "index"})
+@AnnotatedFor({"nullness", "index", "modifiability"})
 public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
     implements Cloneable, java.io.Serializable permits JumboEnumSet, RegularEnumSet
 {
@@ -99,7 +102,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -113,7 +116,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -134,7 +137,7 @@ public static <E extends Enum<E>> EnumSet<E> noneOf(Class<E> elementType) {
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -144,7 +147,7 @@ public static <E extends Enum<E>> EnumSet<E> allOf(Class<E> elementType) {
      * Adds all of the elements from the appropriate enum type to this enum
      * set, which is empty prior to the call.
      */
-    abstract void addAll();
+    abstract void addAll(@Growable EnumSet<E> this);
 
     /**
      * Creates an enum set with the same element type as the specified enum
@@ -155,7 +158,7 @@ public static <E extends Enum<E>> EnumSet<E> allOf(Class<E> elementType) {
      * @return A copy of the specified enum set.
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -173,7 +176,7 @@ public static <E extends Enum<E>> EnumSet<E> copyOf(EnumSet<E> s) {
      *     {@code EnumSet} instance and contains no elements
      * @throws NullPointerException if {@code c} is null
      */
-    public static <E extends Enum<E>> EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -198,7 +201,7 @@ public static <E extends Enum<E>> EnumSet<E> copyOf(Collection<E> c) {
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -218,7 +221,7 @@ public static <E extends Enum<E>> EnumSet<E> complementOf(EnumSet<E> s) {
      * @throws NullPointerException if {@code e} is null
      * @return an enum set initially containing the specified element
      */
-    public static <E extends Enum<E>> EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -239,7 +242,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E e) {
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -262,7 +265,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2) {
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -287,7 +290,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3) {
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -314,7 +317,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3, E e4) {
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -341,7 +344,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E e1, E e2, E e3, E e4,
      * @return an enum set initially containing the specified elements
      */
     @SafeVarargs
-    public static <E extends Enum<E>> EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -363,7 +366,7 @@ public static <E extends Enum<E>> EnumSet<E> of(E first, E... rest) {
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -375,7 +378,7 @@ public static <E extends Enum<E>> EnumSet<E> range(E from, E to) {
      * Adds the specified range to this enum set, which is empty prior
      * to the call.
      */
-    abstract void addRange(E from, E to);
+    abstract void addRange(@Growable EnumSet<E> this, E from, E to);
 
     /**
      * Returns a copy of this set.
@@ -383,7 +386,7 @@ public static <E extends Enum<E>> EnumSet<E> range(E from, E to) {
      * @return a copy of this set
      */
     @SuppressWarnings("unchecked")
-    public EnumSet<E> clone() {
+    public @Modifiable EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
@@ -394,7 +397,7 @@ public EnumSet<E> clone() {
     /**
      * Complements the contents of this enum set.
      */
-    abstract void complement();
+    abstract void complement(@Growable @Shrinkable EnumSet<E> this);
 
     /**
      * Throws an exception if e is not of the correct type for this enum set.
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 1de279204ced..103af8a27a01 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -1518,7 +1518,7 @@ public void replaceAll(@Replaceable HashMap<K,V> this, BiFunction<? super K, ? s
     @SideEffectFree
     @SuppressWarnings("unchecked")
     @Override
-    public Object clone(@GuardSatisfied HashMap<K, V> this) {
+    public @Modifiable Object clone(@GuardSatisfied HashMap<K, V> this) {
         HashMap<K,V> result;
         try {
             result = (HashMap<K,V>)super.clone();
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 9069c6bf4c4f..f083d281b427 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -294,7 +294,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 9f8470fafb3f..aecededa6607 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -595,7 +595,7 @@ public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this)
      * @return  a clone of the hashtable
      */
     @SideEffectFree
-    public synchronized Object clone(@GuardSatisfied Hashtable<K, V> this) {
+    public synchronized @Modifiable Object clone(@GuardSatisfied Hashtable<K, V> this) {
         Hashtable<?,?> t = cloneHashtable();
         t.table = new Entry<?,?>[table.length];
         for (int i = table.length ; i-- > 0 ; ) {
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index ccd323ff0e9c..1a48ce607ba1 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -755,7 +755,7 @@ public int hashCode(@GuardSatisfied IdentityHashMap<K, V> this) {
      * @return a shallow copy of this map
      */
     @SideEffectFree
-    public Object clone(@GuardSatisfied IdentityHashMap<K, V> this) {
+    public @Modifiable Object clone(@GuardSatisfied IdentityHashMap<K, V> this) {
         try {
             IdentityHashMap<?,?> m = (IdentityHashMap<?,?>) super.clone();
             m.entrySet = null;
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index b4b11f1edf6d..cd3cfcc83dfe 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -1074,7 +1074,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 310920f61f3c..bea1bdc2742a 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -972,7 +972,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *
      * @return a shallow copy of this map
      */
-    public Object clone(@GuardSatisfied TreeMap<K, V> this) {
+    public @Modifiable Object clone(@GuardSatisfied TreeMap<K, V> this) {
         TreeMap<?,?> clone;
         try {
             clone = (TreeMap<?,?>) super.clone();
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 1c964058b6d3..2b55d0553f94 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -539,7 +539,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 49b80371f705..4093f4305b93 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -699,7 +699,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 2e86d17af041..8397bc488ab4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -1144,7 +1144,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      *
      * @return a shallow copy of this map
      */
-    public ConcurrentSkipListMap<K,V> clone() {
+    public @Modifiable ConcurrentSkipListMap<K,V> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListMap<K,V> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index fd182a645a80..6c7b5d3eb1f5 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -189,7 +189,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public ConcurrentSkipListSet<E> clone() {
+    public @Modifiable ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index 137c3083f196..0ea4fa62040d 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -328,7 +328,7 @@ public int lastIndexOf(E e, int index) {
      *
      * @return a clone of this list
      */
-    public Object clone() {
+    public @Modifiable Object clone() {
         try {
             @SuppressWarnings("unchecked")
             CopyOnWriteArrayList<E> clone =

From 346776f7fc95fc7a764bbdce7a4266725f400129 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 8 Apr 2026 16:20:27 -0700
Subject: [PATCH 042/119] missed the import for polymod

---
 src/java.base/share/classes/java/util/ArrayList.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 14d142ece091..2a4e7ddbf905 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -34,6 +34,7 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;

From 55bcb253e0ebd988057776531e8512bba87ed010 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Fri, 10 Apr 2026 20:29:05 -0700
Subject: [PATCH 043/119] Add `@DoesNotUnrefineReceiver` annotations (still
 need to add imports)

---
 .../classes/java/io/ObjectInputStream.java    |   2 +
 .../classes/java/io/ObjectOutputStream.java   |   2 +
 .../classes/java/lang/LiveStackFrame.java     |   1 +
 .../classes/java/lang/LiveStackFrameInfo.java |   2 +
 .../share/classes/java/lang/String.java       |   4 +
 .../share/classes/java/lang/StringLatin1.java |  16 +++
 .../share/classes/java/lang/StringUTF16.java  |  24 ++++
 .../share/classes/java/lang/ThreadLocal.java  |   1 +
 .../lang/invoke/AbstractConstantGroup.java    |   4 +-
 .../classes/java/util/AbstractCollection.java |  17 ++-
 .../share/classes/java/util/AbstractList.java |  25 +++-
 .../share/classes/java/util/AbstractMap.java  |  22 ++-
 .../classes/java/util/AbstractQueue.java      |   6 +
 .../share/classes/java/util/AbstractSet.java  |   2 +
 .../share/classes/java/util/ArrayDeque.java   |  32 ++++-
 .../share/classes/java/util/ArrayList.java    |  64 ++++++++-
 .../share/classes/java/util/Arrays.java       |   4 +-
 .../share/classes/java/util/Collection.java   |  18 ++-
 .../share/classes/java/util/Collections.java  | 129 ++++++++++++++++--
 .../share/classes/java/util/Deque.java        |  29 +++-
 .../share/classes/java/util/EnumMap.java      |   1 -
 .../share/classes/java/util/EnumSet.java      |   5 +
 .../share/classes/java/util/HashMap.java      |  39 +++++-
 .../share/classes/java/util/HashSet.java      |   7 +-
 .../share/classes/java/util/Hashtable.java    |  27 ++++
 .../classes/java/util/IdentityHashMap.java    |  25 +++-
 .../java/util/ImmutableCollections.java       |  21 +++
 .../share/classes/java/util/Iterator.java     |   4 +
 .../share/classes/java/util/JumboEnumSet.java |   4 +
 .../classes/java/util/LinkedHashMap.java      |  51 ++++++-
 .../classes/java/util/LinkedHashSet.java      |  10 ++
 .../share/classes/java/util/LinkedList.java   |  84 +++++++++++-
 .../share/classes/java/util/List.java         |  22 +--
 .../share/classes/java/util/ListIterator.java |   6 +
 .../share/classes/java/util/Map.java          |  32 ++++-
 .../share/classes/java/util/NavigableMap.java |  17 ++-
 .../share/classes/java/util/NavigableSet.java |  16 ++-
 .../classes/java/util/PrimitiveIterator.java  |  14 ++
 .../classes/java/util/PriorityQueue.java      |   3 +-
 .../share/classes/java/util/Properties.java   |  22 +++
 .../share/classes/java/util/Queue.java        |   9 +-
 .../classes/java/util/RegularEnumSet.java     |  12 ++
 .../java/util/ReverseOrderDequeView.java      |   5 +
 .../java/util/ReverseOrderListView.java       |   8 ++
 .../java/util/ReverseOrderSortedMapView.java  |   2 +
 .../java/util/ReverseOrderSortedSetView.java  |   6 +
 .../java/util/SequencedCollection.java        |   8 ++
 .../share/classes/java/util/SequencedMap.java |  15 +-
 .../share/classes/java/util/SequencedSet.java |   3 +
 .../share/classes/java/util/Set.java          |  13 +-
 .../share/classes/java/util/SortedMap.java    |   4 +
 .../share/classes/java/util/SortedSet.java    |  13 +-
 .../share/classes/java/util/Stack.java        |   4 +
 .../share/classes/java/util/TreeMap.java      |  43 +++++-
 .../share/classes/java/util/TreeSet.java      |  38 ++++--
 .../share/classes/java/util/Vector.java       |  42 +++++-
 .../share/classes/java/util/WeakHashMap.java  |  21 ++-
 .../util/concurrent/ArrayBlockingQueue.java   |  18 ++-
 .../util/concurrent/ConcurrentHashMap.java    |  44 +++++-
 .../concurrent/ConcurrentLinkedDeque.java     |  32 ++++-
 .../concurrent/ConcurrentLinkedQueue.java     |  14 +-
 .../concurrent/ConcurrentSkipListMap.java     |  79 ++++++++++-
 .../concurrent/ConcurrentSkipListSet.java     |  31 +++--
 .../util/concurrent/CopyOnWriteArrayList.java | 103 +++++++++++++-
 .../util/concurrent/CopyOnWriteArraySet.java  |   9 ++
 .../java/util/concurrent/DelayQueue.java      |  17 ++-
 .../util/concurrent/LinkedBlockingDeque.java  |  45 +++++-
 .../util/concurrent/LinkedBlockingQueue.java  |  19 ++-
 .../util/concurrent/LinkedTransferQueue.java  |  25 +++-
 .../concurrent/PriorityBlockingQueue.java     |  21 ++-
 .../util/concurrent/SynchronousQueue.java     |  16 ++-
 .../java/util/stream/DoublePipeline.java      |   1 +
 .../classes/java/util/stream/IntPipeline.java |   1 +
 .../java/util/stream/LongPipeline.java        |   1 +
 .../classes/java/util/stream/Stream.java      |   1 -
 .../internal/jimage/ImageStringsReader.java   |   4 +
 .../jdk/internal/util/ArraysSupport.java      |   4 +
 .../classes/javax/swing/DefaultListModel.java |   1 +
 .../util/SequencedCollection/SimpleDeque.java |   1 +
 79 files changed, 1399 insertions(+), 148 deletions(-)

diff --git a/src/java.base/share/classes/java/io/ObjectInputStream.java b/src/java.base/share/classes/java/io/ObjectInputStream.java
index f8343235e34b..377d7b30e1f0 100644
--- a/src/java.base/share/classes/java/io/ObjectInputStream.java
+++ b/src/java.base/share/classes/java/io/ObjectInputStream.java
@@ -4099,6 +4099,7 @@ void clear() {
         /**
          * Returns number of handles registered in table.
          */
+        @Pure
         int size() {
             return size;
         }
@@ -4148,6 +4149,7 @@ public int get(int index) {
                 return list[index];
             }
 
+            @Pure
             public int size() {
                 return size;
             }
diff --git a/src/java.base/share/classes/java/io/ObjectOutputStream.java b/src/java.base/share/classes/java/io/ObjectOutputStream.java
index 1361cdc2c34e..7c25218bea74 100644
--- a/src/java.base/share/classes/java/io/ObjectOutputStream.java
+++ b/src/java.base/share/classes/java/io/ObjectOutputStream.java
@@ -2344,6 +2344,7 @@ void clear() {
         /**
          * Returns the number of mappings currently in table.
          */
+        @Pure
         int size() {
             return size;
         }
@@ -2444,6 +2445,7 @@ void clear() {
         /**
          * Returns the number of mappings currently in table.
          */
+        @Pure
         int size() {
             return htab.size();
         }
diff --git a/src/java.base/share/classes/java/lang/LiveStackFrame.java b/src/java.base/share/classes/java/lang/LiveStackFrame.java
index 77a02d083c80..556ec2eb3e6c 100644
--- a/src/java.base/share/classes/java/lang/LiveStackFrame.java
+++ b/src/java.base/share/classes/java/lang/LiveStackFrame.java
@@ -125,6 +125,7 @@ public abstract class PrimitiveSlot {
         /**
          * Returns the size, in bytes, of the slot.
          */
+        @Pure
         public abstract int size();
 
         /**
diff --git a/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java b/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
index b6583adf559f..335980a6e4cd 100644
--- a/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
+++ b/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
@@ -92,6 +92,7 @@ private static class PrimitiveSlot32 extends PrimitiveSlot {
         }
 
         @Override
+        @Pure
         public int size() {
             return 4;
         }
@@ -114,6 +115,7 @@ private static class PrimitiveSlot64 extends PrimitiveSlot {
         }
 
         @Override
+        @Pure
         public int size() {
             return 8;
         }
diff --git a/src/java.base/share/classes/java/lang/String.java b/src/java.base/share/classes/java/lang/String.java
index b35e6124e152..8d67ce57c73e 100644
--- a/src/java.base/share/classes/java/lang/String.java
+++ b/src/java.base/share/classes/java/lang/String.java
@@ -2617,6 +2617,8 @@ public int hashCode() {
      *          {@code endIndex}.
      * @since   21
      */
+    @Pure
+    @StaticallyExecutable
     public int indexOf(int ch, int beginIndex, int endIndex) {
         checkBoundsBeginEnd(beginIndex, endIndex, length());
         return isLatin1() ? StringLatin1.indexOf(value, ch, beginIndex, endIndex)
@@ -2781,6 +2783,8 @@ public int indexOf(int ch, int beginIndex, int endIndex) {
      *          {@code endIndex}.
      * @since   21
      */
+    @Pure
+    @StaticallyExecutable
     public int indexOf(String str, int beginIndex, int endIndex) {
         if (str.length() == 1) {
             /* Simple optimization, can be omitted without behavioral impact */
diff --git a/src/java.base/share/classes/java/lang/StringLatin1.java b/src/java.base/share/classes/java/lang/StringLatin1.java
index 7c12e5711b39..f9586f8aaf29 100644
--- a/src/java.base/share/classes/java/lang/StringLatin1.java
+++ b/src/java.base/share/classes/java/lang/StringLatin1.java
@@ -184,6 +184,8 @@ public static int compareToCI_UTF16(byte[] value, byte[] other) {
         return len1 - len2;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int hashCode(byte[] value) {
         return switch (value.length) {
             case 0 -> 0;
@@ -192,6 +194,8 @@ public static int hashCode(byte[] value) {
         };
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int indexOf(byte[] value, int ch, int fromIndex, int toIndex) {
         if (!canEncode(ch)) {
             return -1;
@@ -215,6 +219,8 @@ private static int indexOfChar(byte[] value, int ch, int fromIndex, int max) {
         return -1;
     }
 
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOf(byte[] value, byte[] str) {
         if (str.length == 0) {
@@ -226,6 +232,8 @@ public static int indexOf(byte[] value, byte[] str) {
         return indexOf(value, value.length, str, str.length, 0);
     }
 
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOf(byte[] value, int valueCount, byte[] str, int strCount, int fromIndex) {
         byte first = str[0];
@@ -249,6 +257,8 @@ public static int indexOf(byte[] value, int valueCount, byte[] str, int strCount
         return -1;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOf(byte[] src, int srcCount,
                                   byte[] tgt, int tgtCount, int fromIndex) {
         int min = tgtCount - 1;
@@ -277,6 +287,8 @@ public static int lastIndexOf(byte[] src, int srcCount,
         }
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOf(final byte[] value, int ch, int fromIndex) {
         if (!canEncode(ch)) {
             return -1;
@@ -580,6 +592,8 @@ public static String trim(byte[] value) {
             newString(value, st, len - st) : null;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int indexOfNonWhitespace(byte[] value) {
         int length = value.length;
         int left = 0;
@@ -593,6 +607,8 @@ public static int indexOfNonWhitespace(byte[] value) {
         return left;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOfNonWhitespace(byte[] value) {
         int length = value.length;
         int right = length;
diff --git a/src/java.base/share/classes/java/lang/StringUTF16.java b/src/java.base/share/classes/java/lang/StringUTF16.java
index 73d858639909..9739aa9de5a9 100644
--- a/src/java.base/share/classes/java/lang/StringUTF16.java
+++ b/src/java.base/share/classes/java/lang/StringUTF16.java
@@ -411,6 +411,8 @@ public static int compareToCI_Latin1(byte[] value, byte[] other) {
         return -StringLatin1.compareToCI_UTF16(other, value);
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int hashCode(byte[] value) {
         return switch (value.length) {
             case 0 -> 0;
@@ -419,6 +421,8 @@ public static int hashCode(byte[] value) {
         };
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int indexOf(byte[] value, int ch, int fromIndex, int toIndex) {
         fromIndex = Math.max(fromIndex, 0);
         toIndex = Math.min(toIndex, value.length >> 1);
@@ -434,6 +438,8 @@ public static int indexOf(byte[] value, int ch, int fromIndex, int toIndex) {
         }
     }
 
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOf(byte[] value, byte[] str) {
         if (str.length == 0) {
@@ -445,6 +451,8 @@ public static int indexOf(byte[] value, byte[] str) {
         return indexOfUnsafe(value, length(value), str, length(str), 0);
     }
 
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOf(byte[] value, int valueCount, byte[] str, int strCount, int fromIndex) {
         checkBoundsBeginEnd(fromIndex, valueCount, value);
@@ -483,6 +491,8 @@ private static int indexOfUnsafe(byte[] value, int valueCount, byte[] str, int s
     /**
      * Handles indexOf Latin1 substring in UTF16 string.
      */
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOfLatin1(byte[] value, byte[] str) {
         if (str.length == 0) {
@@ -494,6 +504,8 @@ public static int indexOfLatin1(byte[] value, byte[] str) {
         return indexOfLatin1Unsafe(value, length(value), str, str.length, 0);
     }
 
+    @Pure
+    @StaticallyExecutable
     @IntrinsicCandidate
     public static int indexOfLatin1(byte[] src, int srcCount, byte[] tgt, int tgtCount, int fromIndex) {
         checkBoundsBeginEnd(fromIndex, srcCount, src);
@@ -501,6 +513,8 @@ public static int indexOfLatin1(byte[] src, int srcCount, byte[] tgt, int tgtCou
         return indexOfLatin1Unsafe(src, srcCount, tgt, tgtCount, fromIndex);
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int indexOfLatin1Unsafe(byte[] src, int srcCount, byte[] tgt, int tgtCount, int fromIndex) {
         assert fromIndex >= 0;
         assert tgtCount > 0;
@@ -562,6 +576,8 @@ private static int indexOfSupplementary(byte[] value, int ch, int fromIndex, int
     }
 
     // srcCoder == UTF16 && tgtCoder == UTF16
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOf(byte[] src, int srcCount,
                                   byte[] tgt, int tgtCount, int fromIndex) {
         assert fromIndex >= 0;
@@ -597,6 +613,8 @@ public static int lastIndexOf(byte[] src, int srcCount,
         }
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOf(byte[] value, int ch, int fromIndex) {
         if (ch < Character.MIN_SUPPLEMENTARY_CODE_POINT) {
             // handle most cases here (ch is a BMP code point or a
@@ -1013,6 +1031,8 @@ public static String trim(byte[] value) {
             null;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int indexOfNonWhitespace(byte[] value) {
         int length = value.length >> 1;
         int left = 0;
@@ -1026,6 +1046,8 @@ public static int indexOfNonWhitespace(byte[] value) {
         return left;
     }
 
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOfNonWhitespace(byte[] value) {
         int length = value.length >>> 1;
         int right = length;
@@ -1463,6 +1485,8 @@ public static void inflate(byte[] src, int srcOff, byte[] dst, int dstOff, int l
     }
 
     // srcCoder == UTF16 && tgtCoder == LATIN1
+    @Pure
+    @StaticallyExecutable
     public static int lastIndexOfLatin1(byte[] src, int srcCount,
                                         byte[] tgt, int tgtCount, int fromIndex) {
         assert fromIndex >= 0;
diff --git a/src/java.base/share/classes/java/lang/ThreadLocal.java b/src/java.base/share/classes/java/lang/ThreadLocal.java
index 01aad2fd7e44..c5cdf0e453e4 100644
--- a/src/java.base/share/classes/java/lang/ThreadLocal.java
+++ b/src/java.base/share/classes/java/lang/ThreadLocal.java
@@ -495,6 +495,7 @@ private ThreadLocalMap(ThreadLocalMap parentMap) {
         /**
          * Returns the number of elements in the map.
          */
+        @Pure
         int size() {
             return size;
         }
diff --git a/src/java.base/share/classes/java/lang/invoke/AbstractConstantGroup.java b/src/java.base/share/classes/java/lang/invoke/AbstractConstantGroup.java
index 1863d17c0821..5cfceb9593d4 100644
--- a/src/java.base/share/classes/java/lang/invoke/AbstractConstantGroup.java
+++ b/src/java.base/share/classes/java/lang/invoke/AbstractConstantGroup.java
@@ -46,7 +46,9 @@ abstract class AbstractConstantGroup implements ConstantGroup {
         this.size = size;
     }
 
-    @Override public final int size() {
+    @Override
+    @Pure
+    public final int size() {
         return size;
     }
 
diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index e95aa874bd39..f68628dc305e 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -29,20 +29,20 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -210,7 +210,6 @@ public boolean contains(@UnknownModifiability @GuardSatisfied AbstractCollection
      * @throws ArrayStoreException  {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T [] toArray(@UnknownModifiability @PolyNull T [] a) {
         // Estimate size of array; be prepared to see more or fewer elements
@@ -282,6 +281,7 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IllegalStateException         {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
@@ -303,6 +303,7 @@ public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
@@ -366,6 +367,7 @@ public boolean containsAll(@UnknownModifiability @GuardSatisfied AbstractCollect
      *
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
         boolean modified = false;
         for (E e : c)
@@ -396,6 +398,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Coll
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
@@ -431,6 +434,7 @@ public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollecti
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
@@ -460,6 +464,7 @@ public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollecti
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index 2dea3eee4646..10a0755237b7 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -32,17 +32,18 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -137,6 +138,7 @@ protected AbstractList() {
      *         prevents it from being added to this list
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
         add(size(), e);
         return true;
@@ -163,6 +165,7 @@ public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
@@ -180,6 +183,7 @@ public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
@@ -194,6 +198,7 @@ public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"t
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
         throw new UnsupportedOperationException();
     }
@@ -213,6 +218,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int indexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator();
         if (o==null) {
@@ -240,6 +246,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int lastIndexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator(size());
         if (o==null) {
@@ -272,6 +279,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this list
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
         removeRange(0, size());
     }
@@ -296,6 +304,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
         rangeCheckForAdd(index);
         boolean modified = false;
@@ -329,7 +338,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
         return new Itr();
     }
 
@@ -341,7 +350,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @see #listIterator(int)
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
         return listIterator(0);
     }
 
@@ -368,7 +377,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
@@ -442,6 +451,7 @@ private class ListItr extends Itr implements ListIterator<E> {
             cursor = index;
         }
 
+        @Pure
         public boolean hasPrevious() {
             return cursor != 0;
         }
@@ -531,7 +541,7 @@ public void add(E e) {
      *         {@code (fromIndex > toIndex)}
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    public @PolyGrowShrink @PolyModifiable List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         subListRangeCheck(fromIndex, toIndex, size());
         return (this instanceof RandomAccess ?
                 new RandomAccessSubList<>(this, fromIndex, toIndex) :
@@ -631,6 +641,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractList<E> this)
      * @param fromIndex index of first element to be removed
      * @param toIndex index after last element to be removed
      */
+    @DoesNotUnrefineReceiver("modifiability")
     protected void removeRange(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 38364b4bc078..1279388b5a64 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Replaceale;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -245,6 +246,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      */
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
         throw new UnsupportedOperationException();
     }
@@ -271,6 +273,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws ClassCastException            {@inheritDoc}
      * @throws NullPointerException          {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         Entry<K,V> correctEntry = null;
@@ -316,6 +319,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
@@ -333,6 +337,7 @@ public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this
      *
      * @throws UnsupportedOperationException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
         entrySet().clear();
     }
@@ -403,6 +408,7 @@ public K next(/*@NonEmpty Iterator<K> this*/) {
                             return i.next().getKey();
                         }
 
+                        @DoesNotUnrefineReceiver("modifiability")
                         public void remove() {
                             i.remove();
                         }
@@ -420,11 +426,13 @@ public boolean isEmpty() {
                     return AbstractMap.this.isEmpty();
                 }
 
+                @DoesNotUnrefineReceiver("modifiability")
                 public void clear() {
                     AbstractMap.this.clear();
                 }
 
                 @EnsuresNonEmptyIf(result = true, expression = "this")
+                @Pure
                 public boolean contains(@UnknownSignedness Object k) {
                     return AbstractMap.this.containsKey(k);
                 }
@@ -470,6 +478,7 @@ public V next(/*@NonEmpty Iterator<V> this*/) {
                             return i.next().getValue();
                         }
 
+                        @DoesNotUnrefineReceiver("modifiability")
                         public void remove() {
                             i.remove();
                         }
@@ -487,6 +496,7 @@ public boolean isEmpty() {
                     return AbstractMap.this.isEmpty();
                 }
 
+                @DoesNotUnrefineReceiver("modifiability")
                 public void clear() {
                     AbstractMap.this.clear();
                 }
@@ -726,6 +736,7 @@ public V getValue(AbstractMap.@GuardSatisfied SimpleEntry<K, V> this) {
          * @param value new value to be stored in this entry
          * @return the old value corresponding to the entry
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public V setValue(AbstractMap.@GuardSatisfied SimpleEntry<K, V> this, V value) {
             V oldValue = this.value;
             this.value = value;
@@ -971,17 +982,26 @@ public String toString(AbstractMap.@GuardSatisfied SimpleImmutableEntry<K, V> th
 
         public boolean add(E t) { throw uoe(); }
         public boolean addAll(Collection<? extends E> c) { throw uoe(); }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() { view().clear(); }
+        @Pure
         public boolean contains(Object o) { return view().contains(o); }
+        @Pure
         public boolean containsAll(Collection<?> c) { return view().containsAll(c); }
         public void forEach(Consumer<? super E> c) { view().forEach(c); }
+        @Pure
         public boolean isEmpty() { return view().isEmpty(); }
         public Iterator<E> iterator() { return view().iterator(); }
         public Stream<E> parallelStream() { return view().parallelStream(); }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(Object o) { return view().remove(o); }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<?> c) { return view().removeAll(c); }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) { return view().removeIf(filter); }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<?> c) { return view().retainAll(c); }
+        @Pure
         public int size() { return view().size(); }
         public Spliterator<E> spliterator() { return view().spliterator(); }
         public Stream<E> stream() { return view().stream(); }
diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index b1272f0d6f5a..f76dc1db8253 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 /**
@@ -102,6 +103,7 @@ public abstract class AbstractQueue<E>
      *         prevents it from being added to this queue
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
         if (offer(e))
             return true;
@@ -120,6 +122,7 @@ public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {
         E x = poll();
         if (x != null)
@@ -139,6 +142,7 @@ public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
+    @SideEffectFree
     public E element(@GuardSatisfied @NonEmpty AbstractQueue<E> this) {
         E x = peek();
         if (x != null)
@@ -154,6 +158,7 @@ public E element(@GuardSatisfied @NonEmpty AbstractQueue<E> this) {
      * <p>This implementation repeatedly invokes {@link #poll poll} until it
      * returns {@code null}.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {
         while (poll() != null)
             ;
@@ -188,6 +193,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this)
      *         this time due to insertion restrictions
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {
         if (c == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index 777d0f98684e..b78c499ed229 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
@@ -176,6 +177,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractSet<E> this) {
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 6e449bd96484..2974f1335515 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -52,6 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -305,6 +306,7 @@ static final <E> E nonNullElementAt(@PolyNull @PolySigned Object[] es, int i) {
      * @param e the element to add
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
@@ -322,6 +324,7 @@ public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      * @param e the element to add
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
@@ -341,6 +344,7 @@ public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable ArrayDeque<E> this, Collection<? extends E> c) {
         final int s, needed;
         if ((needed = (s = size()) + c.size() + 1 - elements.length) > 0)
@@ -360,6 +364,7 @@ private void copyElements(Collection<? extends E> c) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
         addFirst(e);
         return true;
@@ -372,6 +377,7 @@ public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerLast(@Growable ArrayDeque<E> this, E e) {
         addLast(e);
         return true;
@@ -380,6 +386,7 @@ public boolean offerLast(@Growable ArrayDeque<E> this, E e) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         E e = pollFirst();
         if (e == null)
@@ -390,6 +397,7 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         E e = pollLast();
         if (e == null)
@@ -397,6 +405,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<
         return e;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         final Object[] es;
         final int h;
@@ -408,6 +417,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<
         return e;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         final Object[] es;
         final int t;
@@ -420,6 +430,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E getFirst(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
         E e = elementAt(elements, head);
         if (e == null)
@@ -430,6 +441,7 @@ public E getFirst(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E getLast(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
         final Object[] es = elements;
         E e = elementAt(es, dec(tail, es.length));
@@ -461,6 +473,7 @@ public E getLast(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      * @param o element to be removed from this deque, if present
      * @return {@code true} if the deque contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o != null) {
             final Object[] es = elements;
@@ -489,6 +502,7 @@ public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink Arra
      * @param o element to be removed from this deque, if present
      * @return {@code true} if the deque contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o != null) {
             final Object[] es = elements;
@@ -517,6 +531,7 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Array
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         addLast(e);
         return true;
@@ -531,6 +546,7 @@ public boolean add(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         return offerLast(e);
     }
@@ -546,6 +562,7 @@ public boolean offer(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         return removeFirst();
     }
@@ -560,6 +577,7 @@ public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> t
      * @return the head of the queue represented by this deque, or
      *         {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         return pollFirst();
     }
@@ -574,6 +592,7 @@ public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> t
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @SideEffectFree
     public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
         return getFirst();
     }
@@ -603,6 +622,7 @@ public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      * @param e the element to push
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
         addFirst(e);
     }
@@ -617,6 +637,7 @@ public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      *         of the stack represented by this deque)
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
         return removeFirst();
     }
@@ -699,11 +720,11 @@ public boolean isEmpty(@GuardSatisfied ArrayDeque<E> this) {
      * @return an iterator over the elements in this deque
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ArrayDeque<E> this) {
         return new DeqIterator();
     }
 
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ArrayDeque<E> this) {
         return new DescendingIterator();
     }
 
@@ -744,6 +765,7 @@ void postDelete(boolean leftShifted) {
                 cursor = dec(cursor, elements.length);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             if (lastRet < 0)
                 throw new IllegalStateException();
@@ -932,6 +954,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink ArrayDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -940,6 +963,7 @@ public boolean removeIf(@Shrinkable @CanShrink ArrayDeque<E> this, Predicate<? s
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -948,6 +972,7 @@ public boolean removeAll(@CanShrink ArrayDeque<E> this, Collection<? extends @Un
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
@@ -1064,6 +1089,7 @@ public boolean contains(@GuardSatisfied ArrayDeque<E> this, @GuardSatisfied @Nul
      * @param o element to be removed from this deque, if present
      * @return {@code true} if this deque contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
@@ -1072,6 +1098,7 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this,
      * Removes all of the elements from this deque.
      * The deque will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
         circularClear(elements, head, tail);
         head = tail = 0;
@@ -1162,7 +1189,6 @@ private <T> T[] toArray(Class<T[]> klazz) {
      *         this deque
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         final int size;
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 2a4e7ddbf905..17267e39925f 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -30,11 +30,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -45,6 +45,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -227,6 +228,7 @@ public class ArrayList<E> extends AbstractList<E>
      * list's current size.  An application can use this operation to minimize
      * the storage of an {@code ArrayList} instance.
      */
+    @SideEffectFree
     public void trimToSize(@GuardSatisfied ArrayList<E> this) {
         modCount++;
         if (size < elementData.length) {
@@ -243,6 +245,7 @@ public void trimToSize(@GuardSatisfied ArrayList<E> this) {
      *
      * @param minCapacity the desired minimum capacity
      */
+    @SideEffectFree
     public void ensureCapacity(@GuardSatisfied ArrayList<E> this, int minCapacity) {
         if (minCapacity > elementData.length
             && !(elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA
@@ -319,6 +322,7 @@ public boolean contains(@GuardSatisfied ArrayList<E> this, @GuardSatisfied @Null
      * or -1 if there is no such index.
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int indexOf(@GuardSatisfied ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return indexOfRange(o, 0, size);
     }
@@ -349,6 +353,7 @@ int indexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int star
      * or -1 if there is no such index.
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int lastIndexOf(@GuardSatisfied ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return lastIndexOfRange(o, 0, size);
     }
@@ -433,7 +438,6 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         if (a.length < size)
@@ -476,6 +480,7 @@ public E get(@GuardSatisfied ArrayList<E> this, @NonNegative int index) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getFirst() {
         if (size == 0) {
             throw new NoSuchElementException();
@@ -490,6 +495,7 @@ public E getFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getLast() {
         int last = size - 1;
         if (last < 0) {
@@ -509,6 +515,7 @@ public E getLast() {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @SideEffectsOnly("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public E set(@Replaceable @GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
         Objects.checkIndex(index, size);
         E oldValue = elementData(index);
@@ -572,6 +579,7 @@ public void add(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int in
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable ArrayList<E> this, E element) {
         add(0, element);
     }
@@ -581,6 +589,7 @@ public void addFirst(@Growable ArrayList<E> this, E element) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable ArrayList<E> this, E element) {
         add(element);
     }
@@ -594,6 +603,7 @@ public void addLast(@Growable ArrayList<E> this, E element) {
      * @return the element that was removed from the list
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int index) {
         Objects.checkIndex(index, size);
         final Object[] es = elementData;
@@ -610,6 +620,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @NonNe
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable ArrayList<E> this) {
         if (size == 0) {
             throw new NoSuchElementException();
@@ -627,6 +638,7 @@ public E removeFirst(@Shrinkable ArrayList<E> this) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable ArrayList<E> this) {
         int last = size - 1;
         if (last < 0) {
@@ -708,6 +720,7 @@ private void checkForComodification(final int expectedModCount) {
     /**
      * {@inheritDoc}
      */
+    @Pure
     public int hashCode() {
         int expectedModCount = modCount;
         int hash = hashCodeRange(0, size);
@@ -715,6 +728,7 @@ public int hashCode() {
         return hash;
     }
 
+    @Pure
     int hashCodeRange(int from, int to) {
         final Object[] es = elementData;
         if (to > es.length) {
@@ -741,6 +755,7 @@ int hashCodeRange(int from, int to) {
      * @param o element to be removed from this list, if present
      * @return {@code true} if this list contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         final Object[] es = elementData;
         final int size = this.size;
@@ -777,6 +792,7 @@ private void fastRemove(Object[] es, int i) {
      * Removes all of the elements from this list.  The list will
      * be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this) {
         modCount++;
         final Object[] es = elementData;
@@ -920,6 +936,7 @@ private static String outOfBoundsMsg(int fromIndex, int toIndex) {
      *         or if the specified collection is null
      * @see Collection#contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return batchRemove(c, false, 0, size);
     }
@@ -940,6 +957,7 @@ public boolean removeAll(@Shrinkable @CanShrink ArrayList<E> this, Collection<?
      *         or if the specified collection is null
      * @see Collection#contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return batchRemove(c, true, 0, size);
     }
@@ -1052,7 +1070,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this, @NonNegative int index) {
+    public @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable ArrayList<E> this, @NonNegative int index) {
         rangeCheckForAdd(index);
         return new ListItr(index);
     }
@@ -1065,7 +1083,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @see #listIterator(int)
      */
-    public @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this) {
+    public @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable ArrayList<E> this) {
         return new ListItr(0);
     }
 
@@ -1077,7 +1095,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink Iterator<E> iterator(@PolyModifiable @PolyGrowShrink ArrayList<E> this) {
+    public @PolyGrowShrink @PolyModifiable Iterator<E> iterator(@PolyGrowShrink @PolyModifiable ArrayList<E> this) {
         return new Itr();
     }
 
@@ -1100,6 +1118,7 @@ public boolean hasNext() {
 
         @SuppressWarnings("unchecked")
         @SideEffectsOnly("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public E next(@NonEmpty Itr this) {
             checkForComodification();
             int i = cursor;
@@ -1112,6 +1131,7 @@ public E next(@NonEmpty Itr this) {
             return (E) elementData[lastRet = i];
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastRet < 0)
                 throw new IllegalStateException();
@@ -1161,19 +1181,23 @@ private class ListItr extends Itr implements ListIterator<E> {
             cursor = index;
         }
 
+        @Pure
         public boolean hasPrevious() {
             return cursor != 0;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public int nextIndex() {
             return cursor;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public int previousIndex() {
             return cursor - 1;
         }
 
         @SuppressWarnings("unchecked")
+        @DoesNotUnrefineReceiver("modifiability")
         public E previous() {
             checkForComodification();
             int i = cursor - 1;
@@ -1186,6 +1210,7 @@ public E previous() {
             return (E) elementData[lastRet = i];
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void set(E e) {
             if (lastRet < 0)
                 throw new IllegalStateException();
@@ -1198,6 +1223,7 @@ public void set(E e) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(E e) {
             checkForComodification();
 
@@ -1242,7 +1268,8 @@ public void add(E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink ArrayList<E> this, @NonNegative int fromIndex, @NonNegative int toIndex) {
+    @DoesNotUnrefineReceiver("modifiability")
+    public @PolyGrowShrink @PolyModifiable List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink ArrayList<E> this, @NonNegative int fromIndex, @NonNegative int toIndex) {
         subListRangeCheck(fromIndex, toIndex, size);
         return new SubList<>(this, fromIndex, toIndex);
     }
@@ -1275,6 +1302,7 @@ private SubList(SubList<E> parent, int fromIndex, int toIndex) {
             this.modCount = parent.modCount;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E set(@NonNegative int index, E element) {
             Objects.checkIndex(index, size);
             checkForComodification();
@@ -1283,6 +1311,7 @@ public E set(@NonNegative int index, E element) {
             return oldValue;
         }
 
+        @Pure
         public E get(@NonNegative int index) {
             Objects.checkIndex(index, size);
             checkForComodification();
@@ -1295,6 +1324,7 @@ public E get(@NonNegative int index) {
             return size;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(@NonNegative int index, E element) {
             rangeCheckForAdd(index);
             checkForComodification();
@@ -1302,6 +1332,7 @@ public void add(@NonNegative int index, E element) {
             updateSizeAndModCount(1);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove(@NonNegative int index) {
             Objects.checkIndex(index, size);
             checkForComodification();
@@ -1310,16 +1341,19 @@ public E remove(@NonNegative int index) {
             return result;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         protected void removeRange(int fromIndex, int toIndex) {
             checkForComodification();
             root.removeRange(offset + fromIndex, offset + toIndex);
             updateSizeAndModCount(fromIndex - toIndex);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends E> c) {
             return addAll(this.size, c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(@NonNegative int index, Collection<? extends E> c) {
             rangeCheckForAdd(index);
             int cSize = c.size();
@@ -1331,14 +1365,17 @@ public boolean addAll(@NonNegative int index, Collection<? extends E> c) {
             return true;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(UnaryOperator<E> operator) {
             root.replaceAllRange(operator, offset, offset + size);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
             return batchRemove(c, false);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<? extends @UnknownSignedness Object> c) {
             return batchRemove(c, true);
         }
@@ -1353,6 +1390,7 @@ private boolean batchRemove(Collection<?> c, boolean complement) {
             return modified;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) {
             checkForComodification();
             int oldSize = root.size;
@@ -1362,6 +1400,7 @@ public boolean removeIf(Predicate<? super E> filter) {
             return modified;
         }
 
+        @SideEffectFree
         public @PolyNull @PolySigned Object[] toArray(SubList<@PolyNull @PolySigned E> this) {
             checkForComodification();
             return Arrays.copyOfRange(root.elementData, offset, offset + size);
@@ -1379,6 +1418,7 @@ public boolean removeIf(Predicate<? super E> filter) {
             return a;
         }
 
+        @Pure
         public boolean equals(@Nullable Object o) {
             if (o == this) {
                 return true;
@@ -1393,18 +1433,23 @@ public boolean equals(@Nullable Object o) {
             return equal;
         }
 
+        @Pure
         public int hashCode() {
             int hash = root.hashCodeRange(offset, offset + size);
             checkForComodification();
             return hash;
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
             int index = root.indexOfRange(o, offset, offset + size);
             checkForComodification();
             return index >= 0 ? index - offset : -1;
         }
 
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
             int index = root.lastIndexOfRange(o, offset, offset + size);
             checkForComodification();
@@ -1450,6 +1495,7 @@ public E next(/*@NonEmpty ListIterator<E> this*/) {
                     return (E) elementData[offset + (lastRet = i)];
                 }
 
+                @Pure
                 public boolean hasPrevious() {
                     return cursor != 0;
                 }
@@ -1647,6 +1693,7 @@ public int characteristics() {
      * @throws NullPointerException {@inheritDoc}
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(Consumer<? super E> action) {
         Objects.requireNonNull(action);
         final int expectedModCount = modCount;
@@ -1802,6 +1849,7 @@ private static boolean isClear(long[] bits, int i) {
      * @throws NullPointerException {@inheritDoc}
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E> filter) {
         return removeIf(filter, 0, size);
     }
@@ -1845,6 +1893,7 @@ boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E>
 
     @SuppressWarnings({"unchecked"})
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable ArrayList<E> this, UnaryOperator<E> operator) {
         replaceAllRange(operator, 0, size);
         // TODO(8203662): remove increment of modCount from ...
@@ -1863,6 +1912,7 @@ private void replaceAllRange(@Replaceable ArrayList<E> this, UnaryOperator<E> op
 
     @Override
     @SuppressWarnings("unchecked")
+    @DoesNotUnrefineReceiver("modifiability")
     public void sort(@Replaceable ArrayList<E> this, Comparator<? super E> c) {
         final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, size, c);
diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index b293cc708df7..56e8ca0b6b7e 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -4305,7 +4305,6 @@ private static class ArrayList<E> extends AbstractList<E>
             return Arrays.copyOf(a, a.length, Object[].class);
         }
 
-        @SideEffectFree
         @Override
         @SuppressWarnings("unchecked")
         public <T> T[] toArray(T[] a) {
@@ -4320,6 +4319,7 @@ public <T> T[] toArray(T[] a) {
         }
 
         @Override
+        @Pure
         public E get(int index) {
             return a[index];
         }
@@ -4332,6 +4332,8 @@ public E set(int index, E element) {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             E[] a = this.a;
             if (o == null) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index bbe27d23ad7d..d61920d8cf76 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -29,12 +29,12 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -416,7 +417,6 @@ public interface Collection<E> extends Iterable<E> {
      *         runtime component type} of the specified array
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T extends @UnknownSignedness Object> @Nullable T [] toArray(@UnknownModifiability Collection<E> this, @PolyNull T[] a);
 
     /**
@@ -454,6 +454,7 @@ public interface Collection<E> extends Iterable<E> {
      * @throws NullPointerException if the generator function is null
      * @since 11
      */
+    @SideEffectFree
     default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[]> generator) {
         return toArray(generator.apply(0));
     }
@@ -494,6 +495,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         time due to insertion restrictions
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     boolean add(@Growable @GuardSatisfied Collection<E> this, E e);
 
     /**
@@ -516,6 +518,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this collection
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean remove(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, @UnknownSignedness Object o);
 
 
@@ -568,6 +571,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         this time due to insertion restrictions
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean addAll(@Growable @GuardSatisfied Collection<E> this, Collection<? extends E> c);
 
     /**
@@ -593,6 +597,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
@@ -617,6 +622,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      *         supported.
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default boolean removeIf(@Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
@@ -652,6 +658,7 @@ default boolean removeIf(@Shrinkable @CanShrink Collection<E> this, Predicate<?
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
@@ -661,6 +668,7 @@ default boolean removeIf(@Shrinkable @CanShrink Collection<E> this, Predicate<?
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this collection
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void clear(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this);
 
 
@@ -791,6 +799,7 @@ default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
      * @return a sequential {@code Stream} over the elements in this collection
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyNonEmpty Stream<E> stream(@UnknownModifiability @PolyNonEmpty Collection<E> this) {
         return StreamSupport.stream(spliterator(), false);
     }
@@ -812,6 +821,7 @@ default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
      * collection
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default Stream<E> parallelStream(@UnknownModifiability Collection<E> this) {
         return StreamSupport.stream(spliterator(), true);
     }
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 51de9366a528..59a382201b91 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -29,12 +29,12 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
-import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -49,6 +49,7 @@
 import org.checkerframework.common.value.qual.ArrayLen;
 import org.checkerframework.common.value.qual.MinLen;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -965,6 +966,7 @@ public static <T> boolean replaceAll(@Replaceable List<T> list, @Nullable T oldV
      * @since  1.4
      */
     @Pure
+    @StaticallyExecutable
     public static @GTENegativeOne int indexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
@@ -1019,6 +1021,7 @@ public static <T> boolean replaceAll(@Replaceable List<T> list, @Nullable T oldV
      * @since  1.4
      */
     @Pure
+    @StaticallyExecutable
     public static @GTENegativeOne int lastIndexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
@@ -1118,7 +1121,9 @@ static class UnmodifiableCollection<E> implements Collection<E>, Serializable {
         public @PolyNull @PolySigned Object[] toArray(Collections.UnmodifiableCollection<@PolyNull @PolySigned E> this)                  {return c.toArray();}
         @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a)              {return c.toArray(a);}
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> f) {return c.toArray(f);}
+        @SideEffectFree
         public String toString()                   {return c.toString();}
 
         @SideEffectFree
@@ -1131,10 +1136,12 @@ static class UnmodifiableCollection<E> implements Collection<E>, Serializable {
                 public boolean hasNext() {return i.hasNext();}
                 @SideEffectsOnly("this")
                 public E next(/*@NonEmpty Iterator<E> this*/)          {return i.next();}
+                @DoesNotUnrefineReceiver("modifiability")
                 public void remove() {
                     throw new UnsupportedOperationException();
                 }
                 @Override
+                @DoesNotUnrefineReceiver("modifiability")
                 public void forEachRemaining(Consumer<? super E> action) {
                     // Use backing collection version
                     i.forEachRemaining(action);
@@ -1142,10 +1149,12 @@ public void forEachRemaining(Consumer<? super E> action) {
             };
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         @EnsuresNonEmpty("this")
         public boolean add(E e) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) {
             throw new UnsupportedOperationException();
         }
@@ -1154,25 +1163,31 @@ public boolean remove(@UnknownSignedness Object o) {
         public boolean containsAll(Collection<? extends @UnknownSignedness Object> coll) {
             return c.containsAll(coll);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends E> coll) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @UnknownSignedness Object> coll) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<? extends @UnknownSignedness Object> coll) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             throw new UnsupportedOperationException();
         }
 
         // Override default methods in Collection
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public void forEach(Consumer<? super E> action) {
             c.forEach(action);
         }
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) {
             throw new UnsupportedOperationException();
         }
@@ -1184,11 +1199,13 @@ public Spliterator<E> spliterator() {
         }
         @SuppressWarnings("unchecked")
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public Stream<E> stream() {
             return (Stream<E>)c.stream();
         }
         @SuppressWarnings("unchecked")
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public Stream<E> parallelStream() {
             return (Stream<E>)c.parallelStream();
         }
@@ -1246,30 +1263,37 @@ private SequencedCollection<E> sc() {
         // Even though this wrapper class is serializable, the reversed view is effectively
         // not serializable because it points to the reversed collection view, which usually isn't
         // serializable.
+        @DoesNotUnrefineReceiver("modifiability")
         public SequencedCollection<E> reversed() {
             return new UnmodifiableSequencedCollection<>(sc().reversed());
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addFirst(E e) {
             throw new UnsupportedOperationException();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addLast(E e) {
             throw new UnsupportedOperationException();
         }
 
+        @Pure
         public E getFirst() {
             return sc().getFirst();
         }
 
+        @Pure
         public E getLast() {
             return sc().getLast();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeFirst() {
             throw new UnsupportedOperationException();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeLast() {
             throw new UnsupportedOperationException();
         }
@@ -1308,7 +1332,9 @@ static class UnmodifiableSet<E> extends UnmodifiableCollection<E>
         private static final long serialVersionUID = -9215047833775013803L;
 
         UnmodifiableSet(Set<? extends E> s)     {super(s);}
+        @Pure
         public boolean equals(Object o) {return o == this || c.equals(o);}
+        @Pure
         public int hashCode()           {return c.hashCode();}
     }
 
@@ -1346,7 +1372,9 @@ static class UnmodifiableSequencedSet<E> extends UnmodifiableSequencedCollection
         private static final long serialVersionUID = -2153469532349793522L;
 
         UnmodifiableSequencedSet(SequencedSet<? extends E> s)    {super(s);}
+        @Pure
         public boolean equals(Object o)                          {return o == this || c.equals(o);}
+        @Pure
         public int hashCode()                                    {return c.hashCode();}
 
         @SuppressWarnings("unchecked")
@@ -1357,6 +1385,7 @@ private SequencedSet<E> ss() {
         // Even though this wrapper class is serializable, the reversed view is effectively
         // not serializable because it points to the reversed set view, which usually isn't
         // serializable.
+        @DoesNotUnrefineReceiver("modifiability")
         public SequencedSet<E> reversed() {
             return new UnmodifiableSequencedSet<>(ss().reversed());
         }
@@ -1400,19 +1429,25 @@ static class UnmodifiableSortedSet<E>
 
         UnmodifiableSortedSet(SortedSet<E> s) {super(s); ss = s;}
 
+        @Pure
         public Comparator<? super E> comparator() {return ss.comparator();}
 
+        @DoesNotUnrefineReceiver("modifiability")
         public SortedSet<E> subSet(E fromElement, E toElement) {
             return new UnmodifiableSortedSet<>(ss.subSet(fromElement,toElement));
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public SortedSet<E> headSet(E toElement) {
             return new UnmodifiableSortedSet<>(ss.headSet(toElement));
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public SortedSet<E> tailSet(E fromElement) {
             return new UnmodifiableSortedSet<>(ss.tailSet(fromElement));
         }
 
+        @Pure
         public E first()                   {return ss.first();}
+        @Pure
         public E last()                    {return ss.last();}
     }
 
@@ -1485,27 +1520,38 @@ public EmptyNavigableSet() {
 
         UnmodifiableNavigableSet(NavigableSet<E> s)         {super(s); ns = s;}
 
+        @Pure
         public E lower(E e)                             { return ns.lower(e); }
+        @Pure
         public E floor(E e)                             { return ns.floor(e); }
+        @Pure
         public E ceiling(E e)                         { return ns.ceiling(e); }
+        @Pure
         public E higher(E e)                           { return ns.higher(e); }
+        @DoesNotUnrefineReceiver("modifiability")
         public E pollFirst()     { throw new UnsupportedOperationException(); }
+        @DoesNotUnrefineReceiver("modifiability")
         public E pollLast()      { throw new UnsupportedOperationException(); }
+        @DoesNotUnrefineReceiver("modifiability")
         public NavigableSet<E> descendingSet()
                  { return new UnmodifiableNavigableSet<>(ns.descendingSet()); }
+        @DoesNotUnrefineReceiver("modifiability")
         public Iterator<E> descendingIterator()
                                          { return descendingSet().iterator(); }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public NavigableSet<E> subSet(E fromElement, boolean fromInclusive, E toElement, boolean toInclusive) {
             return new UnmodifiableNavigableSet<>(
                 ns.subSet(fromElement, fromInclusive, toElement, toInclusive));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public NavigableSet<E> headSet(E toElement, boolean inclusive) {
             return new UnmodifiableNavigableSet<>(
                 ns.headSet(toElement, inclusive));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
             return new UnmodifiableNavigableSet<>(
                 ns.tailSet(fromElement, inclusive));
@@ -1555,36 +1601,50 @@ static class UnmodifiableList<E> extends UnmodifiableCollection<E>
             this.list = list;
         }
 
+        @Pure
         public boolean equals(Object o) {return o == this || list.equals(o);}
+        @Pure
         public int hashCode()           {return list.hashCode();}
 
+        @Pure
         public E get(int index) {return list.get(index);}
+        @DoesNotUnrefineReceiver("modifiability")
         public E set(int index, E element) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(int index, E element) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove(int index) {
             throw new UnsupportedOperationException();
         }
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o)            {return list.indexOf(o);}
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o)        {return list.lastIndexOf(o);}
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(int index, Collection<? extends E> c) {
             throw new UnsupportedOperationException();
         }
 
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(UnaryOperator<E> operator) {
             throw new UnsupportedOperationException();
         }
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public void sort(Comparator<? super E> c) {
             throw new UnsupportedOperationException();
         }
 
         public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty UnmodifiableList<E> this)   {return listIterator(0);}
 
+        @DoesNotUnrefineReceiver("modifiability")
         public ListIterator<E> listIterator(final int index) {
             return new ListIterator<>() {
                 private final ListIterator<? extends E> i
@@ -1952,6 +2012,7 @@ public void forEachRemaining(Consumer<? super Map.Entry<K, V>> action) {
             }
 
             @SuppressWarnings("unchecked")
+            @SideEffectFree
             public Object[] toArray() {
                 Object[] a = c.toArray();
                 for (int i=0; i<a.length; i++)
@@ -1960,6 +2021,7 @@ public Object[] toArray() {
             }
 
             @SuppressWarnings("unchecked")
+            @SideEffectFree
             public <T> @Nullable T[] toArray(@PolyNull T[] a) {
                 // We don't pass a to c.toArray, to avoid window of
                 // vulnerability wherein an unscrupulous multithreaded client
@@ -2151,6 +2213,7 @@ static class UnmodifiableSortedMap<K,V>
         private final SortedMap<K, ? extends V> sm;
 
         UnmodifiableSortedMap(SortedMap<K, ? extends V> m) {super(m); sm = m; }
+        @Pure
         public Comparator<? super K> comparator()   { return sm.comparator(); }
         @SideEffectFree
         public SortedMap<K,V> subMap(K fromKey, K toKey)
@@ -2357,11 +2420,11 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive)
      * @param  c the collection to be "wrapped" in a synchronized collection.
      * @return a synchronized view of the specified collection.
      */
-    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> c) {
+    public static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> c) {
         return new SynchronizedCollection<>(c);
     }
 
-    static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> synchronizedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<T> c, Object mutex) {
+    static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> c, Object mutex) {
         return new SynchronizedCollection<>(c, mutex);
     }
 
@@ -2405,10 +2468,10 @@ public boolean contains(@UnknownSignedness Object o) {
         public @PolyNull @PolySigned Object[] toArray(Collections.SynchronizedCollection<@PolyNull @PolySigned E> this) {
             synchronized (mutex) {return c.toArray();}
         }
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             synchronized (mutex) {return c.toArray(a);}
         }
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> f) {
             synchronized (mutex) {return c.toArray(f);}
         }
@@ -2599,6 +2662,7 @@ static class SynchronizedSortedSet<E>
             ss = s;
         }
 
+        @Pure
         public Comparator<? super E> comparator() {
             synchronized (mutex) {return ss.comparator();}
         }
@@ -2773,13 +2837,13 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @param  list the list to be "wrapped" in a synchronized list.
      * @return a synchronized view of the specified list.
      */
-    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> list) {
+    public static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> list) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list) :
                 new SynchronizedList<>(list));
     }
 
-    static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> synchronizedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<T> list, Object mutex) {
+    static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> list, Object mutex) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list, mutex) :
                 new SynchronizedList<>(list, mutex));
@@ -2815,6 +2879,7 @@ public int hashCode() {
             synchronized (mutex) {return list.hashCode();}
         }
 
+        @Pure
         public E get(int index) {
             synchronized (mutex) {return list.get(index);}
         }
@@ -2828,9 +2893,13 @@ public E remove(int index) {
             synchronized (mutex) {return list.remove(index);}
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             synchronized (mutex) {return list.indexOf(o);}
         }
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             synchronized (mutex) {return list.lastIndexOf(o);}
         }
@@ -3183,6 +3252,7 @@ static class SynchronizedSortedMap<K,V>
             sm = m;
         }
 
+        @Pure
         public Comparator<? super K> comparator() {
             synchronized (mutex) {return sm.comparator();}
         }
@@ -3450,7 +3520,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      * @return a dynamically typesafe view of the specified collection
      * @since 1.5
      */
-    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> checkedCollection(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> c,
+    public static <E> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<E> checkedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<E> c,
                                                       Class<E> type) {
         return new CheckedCollection<>(c, type);
     }
@@ -3501,6 +3571,7 @@ private String badElementMsg(Object o) {
         public @PolyNull @PolySigned Object[] toArray(Collections.CheckedCollection<@PolyNull @PolySigned E> this)                  { return c.toArray(); }
         @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a)              { return c.toArray(a); }
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> f) { return c.toArray(f); }
         public String toString()                   { return c.toString(); }
         public boolean remove(@UnknownSignedness Object o)            { return c.remove(o); }
@@ -3620,7 +3691,7 @@ public boolean removeIf(Predicate<? super E> filter) {
      * @return a dynamically typesafe view of the specified queue
      * @since 1.8
      */
-    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<E> checkedQueue(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<E> queue, Class<E> type) {
+    public static <E> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Queue<E> checkedQueue(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Queue<E> queue, Class<E> type) {
         return new CheckedQueue<>(queue, type);
     }
 
@@ -3749,8 +3820,11 @@ static class CheckedSortedSet<E> extends CheckedSet<E>
             ss = s;
         }
 
+        @Pure
         public Comparator<? super E> comparator() { return ss.comparator(); }
+        @Pure
         public E first()                   { return ss.first(); }
+        @Pure
         public E last()                    { return ss.last(); }
 
         public SortedSet<E> subSet(E fromElement, E toElement) {
@@ -3814,9 +3888,13 @@ static class CheckedNavigableSet<E> extends CheckedSortedSet<E>
             ns = s;
         }
 
+        @Pure
         public E lower(E e)                             { return ns.lower(e); }
+        @Pure
         public E floor(E e)                             { return ns.floor(e); }
+        @Pure
         public E ceiling(E e)                         { return ns.ceiling(e); }
+        @Pure
         public E higher(E e)                           { return ns.higher(e); }
         public E pollFirst()                         { return ns.pollFirst(); }
         public E pollLast()                            {return ns.pollLast(); }
@@ -3875,7 +3953,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return a dynamically typesafe view of the specified list
      * @since 1.5
      */
-    public static <E> @PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> checkedList(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> list, Class<E> type) {
+    public static <E> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> checkedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> list, Class<E> type) {
         return (list instanceof RandomAccess ?
                 new CheckedRandomAccessList<>(list, type) :
                 new CheckedList<>(list, type));
@@ -3898,11 +3976,19 @@ static class CheckedList<E>
             this.list = list;
         }
 
+        @Pure
         public boolean equals(Object o)  { return o == this || list.equals(o); }
+        @Pure
         public int hashCode()            { return list.hashCode(); }
+        @Pure
+        @StaticallyExecutable
         public E get(int index)          { return list.get(index); }
         public E remove(int index)       { return list.remove(index); }
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o)     { return list.indexOf(o); }
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) { return list.lastIndexOf(o); }
 
         public E set(int index, E element) {
@@ -3927,6 +4013,7 @@ public ListIterator<E> listIterator(final int index) {
                 public boolean hasNext()     { return i.hasNext(); }
                 @SideEffectsOnly("this")
                 public E next(/*@NonEmpty ListIterator<E> this*/)              { return i.next(); }
+                @Pure
                 public boolean hasPrevious() { return i.hasPrevious(); }
                 public E previous()          { return i.previous(); }
                 public int nextIndex()       { return i.nextIndex(); }
@@ -4265,6 +4352,7 @@ public void forEachRemaining(Consumer<? super Entry<K, V>> action) {
             }
 
             @SuppressWarnings("unchecked")
+            @SideEffectFree
             public Object[] toArray() {
                 Object[] source = s.toArray();
 
@@ -4470,6 +4558,7 @@ static class CheckedSortedMap<K,V> extends CheckedMap<K,V>
             sm = m;
         }
 
+        @Pure
         public Comparator<? super K> comparator() { return sm.comparator(); }
         public K firstKey()                       { return sm.firstKey(); }
         public K lastKey()                        { return sm.lastKey(); }
@@ -4549,6 +4638,7 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
             nm = m;
         }
 
+        @Pure
         public Comparator<? super K> comparator()   { return nm.comparator(); }
         public K firstKey()                           { return nm.firstKey(); }
         public K lastKey()                             { return nm.lastKey(); }
@@ -4753,6 +4843,7 @@ private static class EmptyListIterator<E>
         static final EmptyListIterator<Object> EMPTY_ITERATOR
             = new EmptyListIterator<>();
 
+        @Pure
         public boolean hasPrevious() { return false; }
         public E previous() { throw new NoSuchElementException(); }
         public int nextIndex()     { return 0; }
@@ -4856,7 +4947,6 @@ public void clear() {}
         @SideEffectFree
         public @PolyNull @PolySigned Object[] toArray(Collections.EmptySet<@PolyNull @PolySigned E> this) { return new Object[0]; }
 
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             if (a.length > 0)
                 a[0] = null;
@@ -5000,13 +5090,13 @@ public void clear() {}
         @SideEffectFree
         public @PolyNull @PolySigned Object[] toArray(Collections.EmptyList<@PolyNull @PolySigned E> this) { return new Object[0]; }
 
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             if (a.length > 0)
                 a[0] = null;
             return a;
         }
 
+        @Pure
         public E get(int index) {
             throw new IndexOutOfBoundsException("Index: "+index);
         }
@@ -5405,6 +5495,7 @@ public Iterator<E> iterator() {
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public boolean contains(@UnknownSignedness Object obj) {return eq(obj, element);}
 
+        @Pure
         public E get(int index) {
             if (index != 0)
               throw new IndexOutOfBoundsException("Index: "+index+", Size: 1");
@@ -5633,14 +5724,19 @@ public boolean contains(@UnknownSignedness Object obj) {
             return n != 0 && eq(obj, element);
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             return contains(o) ? 0 : -1;
         }
 
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             return contains(o) ? n - 1 : -1;
         }
 
+        @Pure
         public E get(int index) {
             Objects.checkIndex(index, n);
             return element;
@@ -5657,6 +5753,7 @@ public void forEach(Consumer<? super E> action) {
             }
         }
 
+        @SideEffectFree
         public @PolyNull @PolySigned Object[] toArray(Collections.CopiesList<@PolyNull @PolySigned E> this) {
             final Object[] a = new Object[n];
             if (element != null)
@@ -5664,7 +5761,6 @@ public void forEach(Consumer<? super E> action) {
             return a;
         }
 
-        @SideEffectFree
         @SuppressWarnings("unchecked")
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             final int n = this.n;
@@ -6303,7 +6399,9 @@ private SequencedMap<E, Boolean> map() {
 
         public void addFirst(E e) { map().putFirst(e, Boolean.TRUE); }
         public void addLast(E e)  { map().putLast(e, Boolean.TRUE); }
+        @Pure
         public E getFirst()       { return nsee(map().firstEntry()); }
+        @Pure
         public E getLast()        { return nsee(map().lastEntry()); }
         public E removeFirst()    { return nsee(map().pollFirstEntry()); }
         public E removeLast()     { return nsee(map().pollLastEntry()); }
@@ -6335,7 +6433,7 @@ private SequencedMap<E, Boolean> map() {
      * @return the queue
      * @since  1.6
      */
-    public static <T> @PolyModifiable @PolyGrowShrink @PolyNonEmpty Queue<T> asLifoQueue(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Deque<T> deque) {
+    public static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Queue<T> asLifoQueue(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Deque<T> deque) {
         return new AsLIFOQueue<>(Objects.requireNonNull(deque));
     }
 
@@ -6373,6 +6471,7 @@ static class AsLIFOQueue<E> extends AbstractQueue<E>
         public @PolyNull @PolySigned Object[] toArray(Collections.AsLIFOQueue<@PolyNull @PolySigned E> this)                   { return q.toArray(); }
         @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a)               { return q.toArray(a); }
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> f)  { return q.toArray(f); }
         public String toString()                    { return q.toString(); }
         @Pure
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index b28d09550095..44b5dd360984 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -39,8 +39,8 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -48,6 +48,7 @@
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -240,6 +241,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     void addFirst(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
@@ -262,6 +264,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     void addLast(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
@@ -280,6 +283,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean offerFirst(@Growable Deque<E> this, E e);
 
     /**
@@ -298,6 +302,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean offerLast(@Growable Deque<E> this, E e);
 
     /**
@@ -308,6 +313,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the head of this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -318,6 +324,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the tail of this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -326,6 +333,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
@@ -334,6 +342,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the tail of this deque, or {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
@@ -346,6 +355,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws NoSuchElementException if this deque is empty
      */
     @EnsuresNonEmpty("this")
+    @Pure
     E getFirst(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -357,6 +367,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws NoSuchElementException if this deque is empty
      */
     @EnsuresNonEmpty("this")
+    @Pure
     E getLast(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -365,6 +376,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the head of this deque, or {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E peekFirst();
 
     /**
@@ -373,6 +385,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *
      * @return the tail of this deque, or {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E peekLast();
 
     /**
@@ -392,6 +405,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, Object o);
 
     /**
@@ -411,6 +425,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, Object o);
 
     // *** Queue methods ***
@@ -438,6 +453,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         element prevents it from being added to this deque
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     boolean add(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
@@ -461,6 +477,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean offer(@Growable Deque<E> this, E e);
 
     /**
@@ -474,6 +491,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -486,6 +504,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the first element of this deque, or {@code null} if
      *         this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this);
 
     /**
@@ -499,6 +518,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E element(@GuardSatisfied @NonEmpty Deque<E> this);
 
     /**
@@ -511,6 +531,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return the head of the queue represented by this deque, or
      *         {@code null} if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E peek();
 
     /**
@@ -537,6 +558,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws IllegalArgumentException if some property of an element of the
      *         specified collection prevents it from being added to this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean addAll(@Growable Deque<E> this, Collection<? extends E> c);
 
     // *** Stack methods ***
@@ -559,6 +581,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @throws IllegalArgumentException if some property of the specified
      *         element prevents it from being added to this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void push(@Growable @GuardSatisfied Deque<E> this, E e);
 
     /**
@@ -571,6 +594,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         of the stack represented by this deque)
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
 
@@ -595,6 +619,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      *         deque does not permit null elements
      *         ({@linkplain Collection##optional-restrictions optional})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean remove(@Shrinkable @GuardSatisfied @CanShrink Deque<E> this, @UnknownSignedness Object o);
 
     /**
@@ -640,6 +665,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return an iterator over the elements in this deque in reverse
      * sequence
      */
+    @DoesNotUnrefineReceiver("modifiability")
     Iterator<E> descendingIterator();
 
     /**
@@ -652,6 +678,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      * @return a reverse-ordered view of this collection, as a {@code Deque}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default Deque<E> reversed() {
         return ReverseOrderDequeView.of(this);
     }
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index b02d5e6e6c13..de0ab5531847 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -542,7 +542,6 @@ public Object[] toArray() {
         }
         @CFComment({"nullness: 'a' is known to be of array class type",
         "Annotation for toArray are technically incorrect. Refer to note on toArray in Collection.java"})
-        @SideEffectFree
         @SuppressWarnings({
             "unchecked",
             "nullness:argument",
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index bb0d6f2085f2..24ea615d8451 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 import jdk.internal.access.SharedSecrets;
@@ -147,6 +148,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * Adds all of the elements from the appropriate enum type to this enum
      * set, which is empty prior to the call.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     abstract void addAll(@Growable EnumSet<E> this);
 
     /**
@@ -378,6 +380,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * Adds the specified range to this enum set, which is empty prior
      * to the call.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     abstract void addRange(@Growable EnumSet<E> this, E from, E to);
 
     /**
@@ -386,6 +389,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return a copy of this set
      */
     @SuppressWarnings("unchecked")
+    @DoesNotUnrefineReceiver("modifiability")
     public @Modifiable EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
@@ -397,6 +401,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
     /**
      * Complements the contents of this enum set.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     abstract void complement(@Growable @Shrinkable EnumSet<E> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 103af8a27a01..6a34e75f4381 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -27,14 +27,14 @@
 
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -45,6 +45,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -326,6 +327,7 @@ public final int hashCode() {
             return Objects.hashCode(key) ^ Objects.hashCode(value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final V setValue(V newValue) {
             V oldValue = value;
             value = newValue;
@@ -648,6 +650,7 @@ public boolean containsKey(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied @
      *         previously associated {@code null} with {@code key}.)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, K key, V value) {
         return putVal(hash(key), key, value, false, true);
     }
@@ -822,6 +825,7 @@ else if ((e = tab[index = (n - 1) & hash]) != null) {
      * @param m mappings to be stored in this map
      * @throws NullPointerException if the specified map is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extends V> m) {
         putMapEntries(m, true);
     }
@@ -835,6 +839,7 @@ public void putAll(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, Ma
      *         (A {@code null} return can also indicate that the map
      *         previously associated {@code null} with {@code key}.)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable @GuardSatisfied HashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Node<K,V> e;
         return (e = removeNode(hash(key), key, null, false, true)) == null ?
@@ -896,6 +901,7 @@ else if (node == p)
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied HashMap<K, V> this) {
         Node<K,V>[] tab;
         modCount++;
@@ -1025,12 +1031,14 @@ <T> T[] valuesToArray(T[] a) {
     final @Shrinkable class KeySet extends AbstractSet<K> {
         @Pure
         public final @NonNegative int size()                 { return size; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
         public final @Modifiable Iterator<K> iterator()     { return new KeyIterator(); }
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public final boolean contains(@Nullable @UnknownSignedness Object o) { return containsKey(o); }
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean remove(@Nullable @UnknownSignedness Object key) {
             return removeNode(hash(key), key, null, false, true) != null;
         }
@@ -1039,6 +1047,7 @@ public final Spliterator<K> spliterator() {
             return new KeySpliterator<>(HashMap.this, 0, -1, 0, 0);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return keysToArray(new Object[size]);
         }
@@ -1047,6 +1056,7 @@ public Object[] toArray() {
             return keysToArray(prepareArray(a));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void forEach(Consumer<? super K> action) {
             Node<K,V>[] tab;
             if (action == null)
@@ -1091,6 +1101,7 @@ public final void forEach(Consumer<? super K> action) {
     final @Shrinkable class Values extends AbstractCollection<V> {
         @Pure
         public final @NonNegative int size()                 { return size; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
         public final @Modifiable Iterator<V> iterator()     { return new ValueIterator(); }
@@ -1102,6 +1113,7 @@ public final Spliterator<V> spliterator() {
             return new ValueSpliterator<>(HashMap.this, 0, -1, 0, 0);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return valuesToArray(new Object[size]);
         }
@@ -1151,6 +1163,7 @@ public final void forEach(Consumer<? super V> action) {
     final @Shrinkable class EntrySet extends AbstractSet<Map.Entry<K,V>> {
         @Pure
         public final @NonNegative int size()                 { return size; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void clear()               { HashMap.this.clear(); }
         @SideEffectFree
         public final @Modifiable Iterator<Map.Entry<K,V>> iterator() {
@@ -1165,6 +1178,7 @@ public final boolean contains(@Nullable @UnknownSignedness Object o) {
             Node<K,V> candidate = getNode(key);
             return candidate != null && candidate.equals(e);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean remove(@Nullable @UnknownSignedness Object o) {
             if (o instanceof Map.Entry<?, ?> e) {
                 Object key = e.getKey();
@@ -1177,6 +1191,7 @@ public final boolean remove(@Nullable @UnknownSignedness Object o) {
         public final Spliterator<Map.Entry<K,V>> spliterator() {
             return new EntrySpliterator<>(HashMap.this, 0, -1, 0, 0);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void forEach(Consumer<? super Map.Entry<K,V>> action) {
             Node<K,V>[] tab;
             if (action == null)
@@ -1204,16 +1219,19 @@ public V getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, V
 
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V putIfAbsent(@Growable HashMap<K,V> this, K key, V value) {
         return putVal(hash(key), key, value, true, true);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
         return removeNode(hash(key), key, value, true, true) != null;
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newValue) {
         Node<K,V> e; V v;
         if ((e = getNode(key)) != null &&
@@ -1226,6 +1244,7 @@ public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newV
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V replace(@Replaceable HashMap<K,V> this, K key, V value) {
         Node<K,V> e;
         if ((e = getNode(key)) != null) {
@@ -1248,6 +1267,7 @@ public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newV
      * mapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfAbsent(@Growable HashMap<K,V> this, K key,
                              Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (mappingFunction == null)
@@ -1314,6 +1334,7 @@ else if (t != null)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfPresent(@Shrinkable @Replaceable HashMap<K,V> this, K key,
                               BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (remappingFunction == null)
@@ -1348,6 +1369,7 @@ else if (t != null)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V compute(@Modifiable HashMap<K,V> this, K key,
                      BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (remappingFunction == null)
@@ -1413,6 +1435,7 @@ else if (v != null) {
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V merge(@Modifiable HashMap<K,V> this, K key, @NonNull V value,
                    BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (value == null || remappingFunction == null)
@@ -1474,6 +1497,7 @@ else if (v != null) {
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(BiConsumer<? super K, ? super V> action) {
         Node<K,V>[] tab;
         if (action == null)
@@ -1490,6 +1514,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable HashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Node<K,V>[] tab;
         if (function == null)
@@ -1671,6 +1696,7 @@ final Node<K,V> nextNode(@NonEmpty HashIterator this) {
             return e;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             Node<K,V> p = current;
             if (p == null)
@@ -1685,16 +1711,19 @@ public final void remove() {
 
     final @Modifiable class KeyIterator extends HashIterator
         implements Iterator<K> {
+        @DoesNotUnrefineReceiver("modifiability")
         public final K next(@NonEmpty KeyIterator this) { return nextNode().key; }
     }
 
     final @Modifiable class ValueIterator extends HashIterator
         implements Iterator<V> {
+        @DoesNotUnrefineReceiver("modifiability")
         public final V next(@NonEmpty ValueIterator this) { return nextNode().value; }
     }
 
     final @Modifiable class EntryIterator extends HashIterator
         implements Iterator<Map.Entry<K,V>> {
+        @DoesNotUnrefineReceiver("modifiability")
         public final Map.Entry<K,V> next(@NonEmpty EntryIterator this) { return nextNode(); }
     }
 
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index f083d281b427..41244751b32c 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,8 +29,6 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -42,6 +40,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -202,7 +201,7 @@ public class HashSet<E>
      * @see ConcurrentModificationException
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty HashSet<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty HashSet<E> this) {
         return map.keySet().iterator();
     }
 
@@ -401,11 +400,13 @@ private void readObject(java.io.ObjectInputStream s)
      * @return a {@code Spliterator} over the elements in this set
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Spliterator<E> spliterator() {
         return new HashMap.KeySpliterator<>(map, 0, -1, 0, 0);
     }
 
     @Override
+    @SideEffectFree
     public Object[] toArray() {
         return map.keysToArray(new Object[map.size()]);
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index aecededa6607..47c988c88d5c 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -506,6 +507,7 @@ private void addEntry(int hash, K key, V value, int index) {
      * @see     #get(Object)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @Nullable V put(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, K key, V value) {
         // Make sure the value is not null
         if (value == null) {
@@ -539,6 +541,7 @@ private void addEntry(int hash, K key, V value, int index) {
      *          or {@code null} if the key did not have a mapping
      * @throws  NullPointerException  if the key is {@code null}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -571,6 +574,7 @@ private void addEntry(int hash, K key, V value, int index) {
      * @throws NullPointerException if the specified map is null
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {
         for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
             put(e.getKey(), e.getValue());
@@ -579,6 +583,7 @@ public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable
     /**
      * Clears this hashtable so that it contains no keys.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {
         Entry<?,?> tab[] = table;
         for (int index = tab.length; --index >= 0; )
@@ -716,9 +721,11 @@ public Iterator<K> iterator() {
         public boolean contains(@UnknownSignedness Object o) {
             return containsKey(o);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) {
             return Hashtable.this.remove(o) != null;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             Hashtable.this.clear();
         }
@@ -754,6 +761,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @EnsuresNonEmpty("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(Map.Entry<K,V> o) {
             return super.add(o);
         }
@@ -774,6 +782,7 @@ public boolean contains(@UnknownSignedness Object o) {
             return false;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) {
             if (!(o instanceof Map.Entry<?, ?> entry))
                 return false;
@@ -805,6 +814,7 @@ public boolean remove(@UnknownSignedness Object o) {
             return count;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             Hashtable.this.clear();
         }
@@ -847,6 +857,7 @@ public Iterator<V> iterator() {
         public boolean contains(@UnknownSignedness Object o) {
             return containsValue(o);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             Hashtable.this.clear();
         }
@@ -938,6 +949,7 @@ public synchronized V getOrDefault(@GuardSatisfied @UnknownSignedness Object key
 
     @SuppressWarnings("unchecked")
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void forEach(BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);     // explicit check required in case
                                             // table is empty.
@@ -958,6 +970,7 @@ public synchronized void forEach(BiConsumer<? super K, ? super V> action) {
 
     @SuppressWarnings("unchecked")
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);     // explicit check required in case
                                               // table is empty.
@@ -979,6 +992,7 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
 
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {
         Objects.requireNonNull(value);
 
@@ -1003,6 +1017,7 @@ public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         Objects.requireNonNull(value);
 
@@ -1028,6 +1043,7 @@ public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatis
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {
         Objects.requireNonNull(oldValue);
         Objects.requireNonNull(newValue);
@@ -1050,6 +1066,7 @@ public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {
         Objects.requireNonNull(value);
         Entry<?,?> tab[] = table;
@@ -1078,6 +1095,7 @@ public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value)
      * mapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull V computeIfAbsent(@Growable Hashtable<K, V> this, K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
 
@@ -1114,6 +1132,7 @@ public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull V computeIfPresent(@Shrinkable @Replaceable Hashtable<K, V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
@@ -1156,6 +1175,7 @@ public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull V compute(@Modifiable Hashtable<K, V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
@@ -1207,6 +1227,7 @@ public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull V merge(@Modifiable Hashtable<K, V> this, K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
 
@@ -1443,14 +1464,17 @@ protected Object clone() {
 
         // Map.Entry Ops
 
+        @Pure
         public K getKey() {
             return key;
         }
 
+        @Pure
         public V getValue() {
             return value;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V setValue(V value) {
             if (value == null)
                 throw new NullPointerException();
@@ -1460,6 +1484,7 @@ public V setValue(V value) {
             return oldValue;
         }
 
+        @Pure
         public boolean equals(Object o) {
             if (!(o instanceof Map.Entry<?, ?> e))
                 return false;
@@ -1468,6 +1493,7 @@ public boolean equals(Object o) {
                (value==null ? e.getValue()==null : value.equals(e.getValue()));
         }
 
+        @Pure
         public int hashCode() {
             return hash ^ Objects.hashCode(value);
         }
@@ -1561,6 +1587,7 @@ public T next(@NonEmpty Enumerator<T> this) {
             return nextElement();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (!iterator)
                 throw new UnsupportedOperationException();
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 1a48ce607ba1..5a14c6a4dfe5 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -29,8 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -463,6 +464,7 @@ private boolean containsMapping(@UnknownSignedness @GuardSatisfied @Nullable Obj
      * @see     #containsKey(Object)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {
         final Object k = maskNull(key);
 
@@ -544,6 +546,7 @@ private boolean resize(int newCapacity) {
      * @param m mappings to be stored in this map
      * @throws NullPointerException if the specified map is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {
         int n = m.size();
         if (n == 0)
@@ -566,6 +569,7 @@ public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V>
      *         (A {@code null} return can also indicate that the map
      *         previously associated {@code null} with {@code key}.)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Object k = maskNull(key);
         Object[] tab = table;
@@ -662,6 +666,7 @@ private void closeDeletion(int d) {
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         modCount++;
         Object[] tab = table;
@@ -801,6 +806,7 @@ protected int nextIndex(@NonEmpty IdentityHashMapIterator<T> this) {
             return lastReturnedIndex;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastReturnedIndex == -1)
                 throw new IllegalStateException();
@@ -903,6 +909,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
             return lastReturnedEntry;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             lastReturnedIndex =
                 ((null == lastReturnedEntry) ? -1 : lastReturnedEntry.index);
@@ -919,18 +926,21 @@ private Entry(int index) {
             }
 
             @SuppressWarnings("unchecked")
+            @Pure
             public K getKey() {
                 checkIndexForEntryUse();
                 return (K) unmaskNull(traversalTable[index]);
             }
 
             @SuppressWarnings("unchecked")
+            @Pure
             public V getValue() {
                 checkIndexForEntryUse();
                 return (V) traversalTable[index+1];
             }
 
             @SuppressWarnings("unchecked")
+            @DoesNotUnrefineReceiver("modifiability")
             public V setValue(V value) {
                 checkIndexForEntryUse();
                 V oldValue = (V) traversalTable[index+1];
@@ -941,6 +951,7 @@ public V setValue(V value) {
                 return oldValue;
             }
 
+            @Pure
             public boolean equals(@Nullable Object o) {
                 if (index < 0)
                     return super.equals(o);
@@ -950,6 +961,7 @@ public boolean equals(@Nullable Object o) {
                         && e.getValue() == traversalTable[index+1];
             }
 
+            @Pure
             public int hashCode() {
                 if (lastReturnedIndex < 0)
                     return super.hashCode();
@@ -1044,6 +1056,7 @@ public Iterator<K> iterator() {
         public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsKey(o);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             int oldSize = size;
             IdentityHashMap.this.remove(o);
@@ -1054,6 +1067,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
          * the former contains an optimization that results in incorrect
          * behavior when c is a smaller "normal" (non-identity-based) Set.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
             Objects.requireNonNull(c);
             boolean modified = false;
@@ -1065,6 +1079,7 @@ public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
             }
             return modified;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             IdentityHashMap.this.clear();
         }
@@ -1079,7 +1094,6 @@ public Object[] toArray() {
             return toArray(new Object[0]);
         }
         @SuppressWarnings("unchecked")
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             int expectedModCount = modCount;
             int size = size();
@@ -1158,6 +1172,7 @@ public Iterator<V> iterator() {
         public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsValue(o);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             for (Iterator<V> i = iterator(); i.hasNext(); ) {
                 if (i.next() == o) {
@@ -1167,6 +1182,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
             }
             return false;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             IdentityHashMap.this.clear();
         }
@@ -1175,7 +1191,6 @@ public Object[] toArray() {
             return toArray(new Object[0]);
         }
         @SuppressWarnings("unchecked")
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             int expectedModCount = modCount;
             int size = size();
@@ -1269,6 +1284,7 @@ public boolean contains(@Nullable @UnknownSignedness Object o) {
             return o instanceof Entry<?, ?> entry
                     && containsMapping(entry.getKey(), entry.getValue());
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             return o instanceof Entry<?, ?> entry
                     && removeMapping(entry.getKey(), entry.getValue());
@@ -1277,6 +1293,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
         public @NonNegative int size() {
             return size;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             IdentityHashMap.this.clear();
         }
@@ -1285,6 +1302,7 @@ public void clear() {
          * the former contains an optimization that results in incorrect
          * behavior when c is a smaller "normal" (non-identity-based) Set.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
             Objects.requireNonNull(c);
             boolean modified = false;
@@ -1303,7 +1321,6 @@ public Object[] toArray() {
         }
 
         @SuppressWarnings("unchecked")
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             int expectedModCount = modCount;
             int size = size();
diff --git a/src/java.base/share/classes/java/util/ImmutableCollections.java b/src/java.base/share/classes/java/util/ImmutableCollections.java
index 293e8c224488..f13c483463f4 100644
--- a/src/java.base/share/classes/java/util/ImmutableCollections.java
+++ b/src/java.base/share/classes/java/util/ImmutableCollections.java
@@ -405,6 +405,7 @@ public void remove() {
             throw uoe();
         }
 
+        @Pure
         public boolean hasPrevious() {
             if (!isListIterator) {
                 throw uoe();
@@ -483,6 +484,7 @@ static <E> SubList<E> fromList(AbstractImmutableList<E> list, int fromIndex, int
             return new SubList<>(list, fromIndex, toIndex - fromIndex);
         }
 
+        @Pure
         public E get(int index) {
             Objects.checkIndex(index, size);
             return root.get(offset + index);
@@ -518,6 +520,8 @@ private boolean allowNulls() {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             if (!allowNulls() && o == null) {
                 throw new NullPointerException();
@@ -531,6 +535,8 @@ public int indexOf(Object o) {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             if (!allowNulls() && o == null) {
                 throw new NullPointerException();
@@ -544,6 +550,7 @@ public int lastIndexOf(Object o) {
         }
 
         @Override
+        @SideEffectFree
         public Object[] toArray() {
             Object[] array = new Object[size];
             for (int i = 0; i < size; i++) {
@@ -603,6 +610,7 @@ public boolean isEmpty() {
         }
 
         @Override
+        @Pure
         @SuppressWarnings("unchecked")
         public E get(int index) {
             if (index == 0) {
@@ -614,6 +622,8 @@ public E get(int index) {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             Objects.requireNonNull(o);
             if (o.equals(e0)) {
@@ -626,6 +636,8 @@ public int indexOf(Object o) {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             Objects.requireNonNull(o);
             if (e1 != EMPTY && o.equals(e1)) {
@@ -652,6 +664,7 @@ private Object writeReplace() {
         }
 
         @Override
+        @SideEffectFree
         public Object[] toArray() {
             if (e1 == EMPTY) {
                 return new Object[] { e0 };
@@ -707,6 +720,7 @@ public int size() {
         }
 
         @Override
+        @Pure
         public E get(int index) {
             return elements[index];
         }
@@ -722,6 +736,7 @@ private Object writeReplace() {
         }
 
         @Override
+        @SideEffectFree
         public Object[] toArray() {
             return Arrays.copyOf(elements, elements.length);
         }
@@ -742,6 +757,8 @@ public Object[] toArray() {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             if (!allowNulls && o == null) {
                 throw new NullPointerException();
@@ -756,6 +773,8 @@ public int indexOf(Object o) {
         }
 
         @Override
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             if (!allowNulls && o == null) {
                 throw new NullPointerException();
@@ -894,6 +913,7 @@ private Object writeReplace() {
         }
 
         @Override
+        @SideEffectFree
         public Object[] toArray() {
             if (e1 == EMPTY) {
                 return new Object[] { e0 };
@@ -1080,6 +1100,7 @@ private Object writeReplace() {
         }
 
         @Override
+        @SideEffectFree
         public Object[] toArray() {
             Object[] array = new Object[size];
             Iterator<E> it = iterator();
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index 1d8786ebe8dc..b767443e391c 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -90,6 +91,7 @@ public interface Iterator<E> {
      * @throws NoSuchElementException if the iteration has no more elements
      */
     @SideEffectsOnly("this")
+    @DoesNotUnrefineReceiver("modifiability")
     E next(@GuardSatisfied @NonEmpty Iterator<E> this);
 
     /**
@@ -117,6 +119,7 @@ public interface Iterator<E> {
      *         been called after the last call to the {@code next}
      *         method
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {
         throw new UnsupportedOperationException("remove");
     }
@@ -146,6 +149,7 @@ default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {
      * @throws NullPointerException if the specified action is null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void forEachRemaining(Consumer<? super E> action) {
         Objects.requireNonNull(action);
         while (hasNext())
diff --git a/src/java.base/share/classes/java/util/JumboEnumSet.java b/src/java.base/share/classes/java/util/JumboEnumSet.java
index 6005a4c5bd0a..72dc66eb2072 100644
--- a/src/java.base/share/classes/java/util/JumboEnumSet.java
+++ b/src/java.base/share/classes/java/util/JumboEnumSet.java
@@ -35,6 +35,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -71,6 +72,7 @@ final class JumboEnumSet<E extends Enum<E>> extends EnumSet<E> {
         elements = new long[(universe.length + 63) >>> 6];
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void addRange(E from, E to) {
         int fromIndex = from.ordinal() >>> 6;
         int toIndex = to.ordinal() >>> 6;
@@ -87,6 +89,7 @@ void addRange(E from, E to) {
         size = to.ordinal() - from.ordinal() + 1;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void addAll() {
         for (int i = 0; i < elements.length; i++)
             elements[i] = -1;
@@ -94,6 +97,7 @@ void addAll() {
         size = universe.length;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void complement() {
         for (int i = 0; i < elements.length; i++)
             elements[i] = ~elements[i];
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 34f72f2b77d2..e1839a80ab4a 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -29,8 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -40,6 +40,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -410,6 +411,7 @@ void afterNodeAccess(Node<K,V> e) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_FIRST;
@@ -427,6 +429,7 @@ public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V putLast(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_LAST;
@@ -579,6 +582,7 @@ public V getOrDefault(@Nullable Object key, V defaultValue) {
     /**
      * {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied LinkedHashMap<K, V> this) {
         super.clear();
         head = tail = null;
@@ -721,6 +725,7 @@ final class LinkedKeySet extends AbstractSet<K> implements SequencedSet<K> {
         LinkedKeySet(boolean reversed)          { this.reversed = reversed; }
         @Pure
         public final int size()                 { return size; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void clear()               { LinkedHashMap.this.clear(); }
         @SideEffectFree
         public final @Modifiable Iterator<K> iterator() {
@@ -729,6 +734,7 @@ final class LinkedKeySet extends AbstractSet<K> implements SequencedSet<K> {
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public final boolean contains(@Nullable @UnknownSignedness Object o) { return containsKey(o); }
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean remove(@Nullable @UnknownSignedness Object key) {
             return removeNode(hash(key), key, null, false, true) != null;
         }
@@ -739,6 +745,7 @@ public final Spliterator<K> spliterator()  {
                                             Spliterator.DISTINCT);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return keysToArray(new Object[size], reversed);
         }
@@ -747,6 +754,7 @@ public Object[] toArray() {
             return keysToArray(prepareArray(a), reversed);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void forEach(Consumer<? super K> action) {
             if (action == null)
                 throw new NullPointerException();
@@ -765,11 +773,13 @@ public final void forEach(Consumer<? super K> action) {
         public final void addLast(K k) { throw new UnsupportedOperationException(); }
         public final K getFirst() { return nsee(reversed ? tail : head).key; }
         public final K getLast() { return nsee(reversed ? head : tail).key; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final K removeFirst() {
             var node = nsee(reversed ? tail : head);
             removeNode(node.hash, node.key, null, false, false);
             return node.key;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final K removeLast() {
             var node = nsee(reversed ? head : tail);
             removeNode(node.hash, node.key, null, false, false);
@@ -848,6 +858,7 @@ public final Spliterator<V> spliterator() {
                                             Spliterator.ORDERED);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return valuesToArray(new Object[size], reversed);
         }
@@ -856,6 +867,7 @@ public Object[] toArray() {
             return valuesToArray(prepareArray(a), reversed);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void forEach(Consumer<? super V> action) {
             if (action == null)
                 throw new NullPointerException();
@@ -874,11 +886,13 @@ public final void forEach(Consumer<? super V> action) {
         public final void addLast(V v) { throw new UnsupportedOperationException(); }
         public final V getFirst() { return nsee(reversed ? tail : head).value; }
         public final V getLast() { return nsee(reversed ? head : tail).value; }
+        @DoesNotUnrefineReceiver("modifiability")
         public final V removeFirst() {
             var node = nsee(reversed ? tail : head);
             removeNode(node.hash, node.key, null, false, false);
             return node.value;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final V removeLast() {
             var node = nsee(reversed ? head : tail);
             removeNode(node.hash, node.key, null, false, false);
@@ -960,6 +974,7 @@ public final boolean contains(@Nullable @UnknownSignedness Object o) {
             Node<K,V> candidate = getNode(key);
             return candidate != null && candidate.equals(e);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean remove(@Nullable @UnknownSignedness Object o) {
             if (o instanceof Map.Entry<?, ?> e) {
                 Object key = e.getKey();
@@ -974,6 +989,7 @@ public final Spliterator<Map.Entry<K,V>> spliterator() {
                                             Spliterator.ORDERED |
                                             Spliterator.DISTINCT);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final void forEach(Consumer<? super Map.Entry<K,V>> action) {
             if (action == null)
                 throw new NullPointerException();
@@ -998,11 +1014,13 @@ final Node<K,V> nsee(Node<K,V> e) {
         public final void addLast(Map.Entry<K,V> e) { throw new UnsupportedOperationException(); }
         public final Map.Entry<K,V> getFirst() { return nsee(reversed ? tail : head); }
         public final Map.Entry<K,V> getLast() { return nsee(reversed ? head : tail); }
+        @DoesNotUnrefineReceiver("modifiability")
         public final Map.Entry<K,V> removeFirst() {
             var node = nsee(reversed ? tail : head);
             removeNode(node.hash, node.key, null, false, false);
             return node;
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final Map.Entry<K,V> removeLast() {
             var node = nsee(reversed ? head : tail);
             removeNode(node.hash, node.key, null, false, false);
@@ -1019,6 +1037,7 @@ public SequencedSet<Map.Entry<K,V>> reversed() {
 
     // Map overrides
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(BiConsumer<? super K, ? super V> action) {
         if (action == null)
             throw new NullPointerException();
@@ -1029,6 +1048,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
             throw new ConcurrentModificationException();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable LinkedHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null)
             throw new NullPointerException();
@@ -1072,6 +1092,7 @@ final LinkedHashMap.Entry<K,V> nextNode(@NonEmpty LinkedHashIterator this) {
             return e;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             Node<K,V> p = current;
             if (p == null)
@@ -1149,48 +1170,59 @@ static class ReversedLinkedHashMapView<K, V> extends AbstractMap<K, V>
         // Object
         // inherit toString() from AbstractMap; it depends on entrySet()
 
+        @Pure
         public boolean equals(Object o) {
             return base.equals(o);
         }
 
+        @Pure
         public int hashCode() {
             return base.hashCode();
         }
 
         // Map
 
+        @Pure
         public int size() {
             return base.size();
         }
 
+        @Pure
         public boolean isEmpty() {
             return base.isEmpty();
         }
 
+        @Pure
         public boolean containsKey(Object key) {
             return base.containsKey(key);
         }
 
+        @Pure
         public boolean containsValue(Object value) {
             return base.containsValue(value);
         }
 
+        @Pure
         public V get(Object key) {
             return base.get(key);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V put(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.put(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key) {
             return base.remove(key);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void putAll(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, Map<? extends K, ? extends V> m) {
             base.putAll(m);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
@@ -1207,10 +1239,12 @@ public Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
 
+        @Pure
         public V getOrDefault(Object key, V defaultValue) {
             return base.getOrDefault(key, defaultValue);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void forEach(BiConsumer<? super K, ? super V> action) {
             if (action == null)
                 throw new NullPointerException();
@@ -1221,6 +1255,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
                 throw new ConcurrentModificationException();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(@Replaceable ReversedLinkedHashMapView<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
             if (function == null)
                 throw new NullPointerException();
@@ -1231,34 +1266,42 @@ public void replaceAll(@Replaceable ReversedLinkedHashMapView<K,V> this, BiFunct
                 throw new ConcurrentModificationException();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V putIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.putIfAbsent(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key, Object value) {
             return base.remove(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V oldValue, V newValue) {
             return base.replace(key, oldValue, newValue);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
             return base.replace(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V computeIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, Function<? super K, ? extends V> mappingFunction) {
             return base.computeIfAbsent(key, mappingFunction);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V computeIfPresent(@Shrinkable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             return base.computeIfPresent(key, remappingFunction);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V compute(@Modifiable ReversedLinkedHashMapView<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             return base.compute(key, remappingFunction);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V merge(@Modifiable ReversedLinkedHashMapView<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
             return base.merge(key, value, remappingFunction);
         }
@@ -1269,26 +1312,32 @@ public SequencedMap<K, V> reversed() {
             return base;
         }
 
+        @Pure
         public Entry<K, V> firstEntry() {
             return base.lastEntry();
         }
 
+        @Pure
         public Entry<K, V> lastEntry() {
             return base.firstEntry();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public Entry<K, V> pollFirstEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.pollLastEntry();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public Entry<K, V> pollLastEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.pollFirstEntry();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V putFirst(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putLast(k, v);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V putLast(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putFirst(k, v);
         }
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 13b934ca653b..dd2723084ab5 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
@@ -213,6 +214,7 @@ public class LinkedHashSet<E>
      * @since 1.8
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public Spliterator<E> spliterator() {
         return Spliterators.spliterator(this, Spliterator.DISTINCT | Spliterator.ORDERED);
     }
@@ -237,6 +239,7 @@ public static <T> LinkedHashSet<T> newLinkedHashSet(int numElements) {
     }
 
     @SuppressWarnings("unchecked")
+    @Deterministic
     LinkedHashMap<E, Object> map() {
         return (LinkedHashMap<E, Object>) map;
     }
@@ -249,6 +252,7 @@ LinkedHashMap<E, Object> map() {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable LinkedHashSet<E> this, E e) {
         map().putFirst(e, PRESENT);
     }
@@ -261,6 +265,7 @@ public void addFirst(@Growable LinkedHashSet<E> this, E e) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable LinkedHashSet<E> this, E e) {
         map().putLast(e, PRESENT);
     }
@@ -271,6 +276,7 @@ public void addLast(@Growable LinkedHashSet<E> this, E e) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getFirst() {
         return map().sequencedKeySet().getFirst();
     }
@@ -281,6 +287,7 @@ public E getFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getLast() {
         return map().sequencedKeySet().getLast();
     }
@@ -291,6 +298,7 @@ public E getLast() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable LinkedHashSet<E> this) {
         return map().sequencedKeySet().removeFirst();
     }
@@ -301,6 +309,7 @@ public E removeFirst(@Shrinkable LinkedHashSet<E> this) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable LinkedHashSet<E> this) {
         return map().sequencedKeySet().removeLast();
     }
@@ -314,6 +323,7 @@ public E removeLast(@Shrinkable LinkedHashSet<E> this) {
      * @return {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public SequencedSet<E> reversed() {
         class ReverseLinkedHashSetView extends AbstractSet<E> implements SequencedSet<E> {
             public int size()                  { return LinkedHashSet.this.size(); }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index cd3cfcc83dfe..a45acc91c49a 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -44,6 +44,8 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -276,6 +278,7 @@ E unlink(Node<E> x) {
      * @return the first element in this list
      * @throws NoSuchElementException if this list is empty
      */
+    @Pure
     public E getFirst(@GuardSatisfied @NonEmpty LinkedList<E> this) {
         final Node<E> f = first;
         if (f == null)
@@ -289,6 +292,7 @@ public E getFirst(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @return the last element in this list
      * @throws NoSuchElementException if this list is empty
      */
+    @Pure
     public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
         final Node<E> l = last;
         if (l == null)
@@ -302,6 +306,7 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @return the first element from this list
      * @throws NoSuchElementException if this list is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         if (f == null)
@@ -315,6 +320,7 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList
      * @return the last element from this list
      * @throws NoSuchElementException if this list is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         final Node<E> l = last;
         if (l == null)
@@ -327,6 +333,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<
      *
      * @param e the element to add
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkFirst(e);
     }
@@ -338,6 +345,7 @@ public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
      *
      * @param e the element to add
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkLast(e);
     }
@@ -377,6 +385,7 @@ public boolean contains(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nul
      */
     @ReleasesNoLocks
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         linkLast(e);
         return true;
@@ -396,6 +405,7 @@ public boolean add(@Growable @GuardSatisfied LinkedList<E> this, E e) {
      * @return {@code true} if this list contained the specified element
      */
     @ReleasesNoLocks
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) {
             for (Node<E> x = first; x != null; x = x.next) {
@@ -427,6 +437,7 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this,
      * @return {@code true} if this list changed as a result of the call
      * @throws NullPointerException if the specified collection is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, Collection<? extends E> c) {
         return addAll(size, c);
     }
@@ -446,6 +457,7 @@ public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, Collection<?
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @throws NullPointerException if the specified collection is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, Collection<? extends E> c) {
         checkPositionIndex(index);
 
@@ -489,6 +501,7 @@ public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative
      * Removes all of the elements from this list.
      * The list will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         // Clearing all of the links between nodes is "unnecessary", but:
         // - helps a generational GC if the discarded nodes inhabit
@@ -531,6 +544,7 @@ public E get(@GuardSatisfied LinkedList<E> this, @NonNegative int index) {
      * @return the element previously at the specified position
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E set(@Replaceable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
         checkElementIndex(index);
         Node<E> x = node(index);
@@ -548,6 +562,7 @@ public E set(@Replaceable @GuardSatisfied LinkedList<E> this, @NonNegative int i
      * @param element element to be inserted
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void add(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
         checkPositionIndex(index);
 
@@ -566,6 +581,7 @@ public void add(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int i
      * @return the element previously at the specified position
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @NonNegative int index) {
         checkElementIndex(index);
         return unlink(node(index));
@@ -638,6 +654,7 @@ Node<E> node(@NonNegative int index) {
      *         this list, or -1 if this list does not contain the element
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int indexOf(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         int index = 0;
         if (o == null) {
@@ -668,6 +685,7 @@ Node<E> node(@NonNegative int index) {
      *         this list, or -1 if this list does not contain the element
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int lastIndexOf(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         int index = size;
         if (o == null) {
@@ -707,6 +725,7 @@ Node<E> node(@NonNegative int index) {
      * @throws NoSuchElementException if this list is empty
      * @since 1.5
      */
+    @SideEffectFree
     public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
         return getFirst();
     }
@@ -717,6 +736,7 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @return the head of this list, or {@code null} if this list is empty
      * @since 1.5
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
@@ -729,6 +749,7 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      * @throws NoSuchElementException if this list is empty
      * @since 1.5
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         return removeFirst();
     }
@@ -740,6 +761,7 @@ public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> t
      * @return {@code true} (as specified by {@link Queue#offer})
      * @since 1.5
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedList<E> this, E e) {
         return add(e);
     }
@@ -752,6 +774,7 @@ public boolean offer(@Growable LinkedList<E> this, E e) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerFirst(@Growable LinkedList<E> this, E e) {
         addFirst(e);
         return true;
@@ -764,6 +787,7 @@ public boolean offerFirst(@Growable LinkedList<E> this, E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerLast(@Growable LinkedList<E> this, E e) {
         addLast(e);
         return true;
@@ -805,6 +829,7 @@ public boolean offerLast(@Growable LinkedList<E> this, E e) {
      *     this list is empty
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
@@ -818,6 +843,7 @@ public boolean offerLast(@Growable LinkedList<E> this, E e) {
      *     this list is empty
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
         final Node<E> l = last;
         return (l == null) ? null : unlinkLast(l);
@@ -832,6 +858,7 @@ public boolean offerLast(@Growable LinkedList<E> this, E e) {
      * @param e the element to push
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {
         addFirst(e);
     }
@@ -847,6 +874,7 @@ public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {
      * @throws NoSuchElementException if this list is empty
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
         return removeFirst();
     }
@@ -860,6 +888,7 @@ public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this
      * @return {@code true} if the list contained the specified element
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return remove(o);
     }
@@ -873,6 +902,7 @@ public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink Link
      * @return {@code true} if the list contained the specified element
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) {
             for (Node<E> x = last; x != null; x = x.prev) {
@@ -913,7 +943,7 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Linke
      * @throws IndexOutOfBoundsException {@inheritDoc}
      * @see List#listIterator(int)
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedList<E> this, @NonNegative int index) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedList<E> this, @NonNegative int index) {
         checkPositionIndex(index);
         return new ListItr(index);
     }
@@ -948,10 +978,12 @@ public E next(@NonEmpty ListItr this) {
             return lastReturned.item;
         }
 
+        @Pure
         public boolean hasPrevious() {
             return nextIndex > 0;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E previous() {
             checkForComodification();
             if (!hasPrevious())
@@ -962,14 +994,17 @@ public E previous() {
             return lastReturned.item;
         }
 
+        @Pure
         public int nextIndex() {
             return nextIndex;
         }
 
+        @Pure
         public int previousIndex() {
             return nextIndex - 1;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             checkForComodification();
             if (lastReturned == null)
@@ -985,6 +1020,7 @@ public void remove() {
             expectedModCount++;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void set(E e) {
             if (lastReturned == null)
                 throw new IllegalStateException();
@@ -992,6 +1028,7 @@ public void set(E e) {
             lastReturned.item = e;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(E e) {
             checkForComodification();
             lastReturned = null;
@@ -1035,7 +1072,7 @@ private static class Node<E> {
     /**
      * @since 1.6
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedList<E> this) {
         return new DescendingIterator();
     }
 
@@ -1053,6 +1090,7 @@ public boolean hasNext() {
         public E next(@NonEmpty DescendingIterator this) {
             return itr.previous();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             itr.remove();
         }
@@ -1150,7 +1188,6 @@ private LinkedList<E> superClone() {
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         if (a.length < size)
@@ -1353,18 +1390,22 @@ public String toString() {
             return rlist.toString();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<?> c) {
             return rlist.retainAll(c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<?> c) {
             return rlist.removeAll(c);
         }
 
+        @Pure
         public boolean containsAll(Collection<?> c) {
             return rlist.containsAll(c);
         }
 
+        @Pure
         public boolean isEmpty() {
             return rlist.isEmpty();
         }
@@ -1377,10 +1418,12 @@ public Stream<E> stream() {
             return rlist.stream();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) {
             return rlist.removeIf(filter);
         }
 
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> generator) {
             return rlist.toArray(generator);
         }
@@ -1409,10 +1452,12 @@ public ListIterator<E> listIterator() {
             return rlist.listIterator();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void sort(Comparator<? super E> c) {
             rlist.sort(c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(UnaryOperator<E> operator) {
             rlist.replaceAll(operator);
         }
@@ -1429,6 +1474,7 @@ public <T> T[] toArray(T[] a) {
             return rlist.toArray(a);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return rlist.toArray();
         }
@@ -1441,26 +1487,32 @@ public ListIterator<E> listIterator(int index) {
             return rlist.listIterator(index);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeLastOccurrence(Object o) {
             return rdeque.removeLastOccurrence(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeFirstOccurrence(Object o) {
             return rdeque.removeFirstOccurrence(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E pop() {
             return rdeque.pop();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void push(E e) {
             rdeque.push(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E pollLast() {
             return rdeque.pollLast();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E pollFirst() {
             return rdeque.pollFirst();
         }
@@ -1473,22 +1525,27 @@ public E peekFirst() {
             return rdeque.peekFirst();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean offerLast(E e) {
             return rdeque.offerLast(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean offerFirst(E e) {
             return rdeque.offerFirst(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean offer(E e) {
             return rdeque.offer(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove() {
             return rdeque.remove();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E poll() {
             return rdeque.poll();
         }
@@ -1501,78 +1558,99 @@ public E peek() {
             return rdeque.peek();
         }
 
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             return rlist.lastIndexOf(o);
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             return rlist.indexOf(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove(int index) {
             return rlist.remove(index);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(int index, E element) {
             rlist.add(index, element);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E set(int index, E element) {
             return rlist.set(index, element);
         }
 
+        @Pure
         public E get(int index) {
             return rlist.get(index);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             rlist.clear();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(int index, Collection<? extends E> c) {
             return rlist.addAll(index, c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends E> c) {
             return rlist.addAll(c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(Object o) {
             return rlist.remove(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(E e) {
             return rlist.add(e);
         }
 
+        @Pure
         public int size() {
             return rlist.size();
         }
 
+        @Pure
         public boolean contains(Object o) {
             return rlist.contains(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addLast(E e) {
             rdeque.addLast(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addFirst(E e) {
             rdeque.addFirst(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeLast() {
             return rdeque.removeLast();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeFirst() {
             return rdeque.removeFirst();
         }
 
+        @Pure
         public E getLast() {
             return rdeque.getLast();
         }
 
+        @Pure
         public E getFirst() {
             return rdeque.getFirst();
         }
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 7ffed30a226c..7c7e1df2c2af 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -33,13 +33,13 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -48,6 +48,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -216,7 +217,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper
@@ -276,7 +277,6 @@ public interface List<E> extends SequencedCollection<E> {
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T extends @UnknownSignedness Object> @Nullable T[] toArray(@UnknownModifiability List<E> this, @PolyNull T[] a);
 
 
@@ -643,6 +643,8 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
+    @SideEffectsOnly("this")
+    @DoesNotUnrefineReceiver("modifiability")
     E set(@Replaceable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
 
     /**
@@ -737,7 +739,7 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      * @return a list iterator over the elements in this list (in proper
      *         sequence)
      */
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
 
     /**
      * Returns a list iterator over the elements in this list (in proper
@@ -754,7 +756,7 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
 
     // View
 
@@ -793,7 +795,7 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      *         fromIndex > toIndex})
      */
     @SideEffectFree
-    @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink List<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex);
+    @PolyGrowShrink @PolyModifiable List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink List<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex);
 
     /**
      * Creates a {@link Spliterator} over the elements in this list.
@@ -878,6 +880,7 @@ default void addLast(@Growable List<E> this, E e) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     default E getFirst() {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
@@ -896,6 +899,7 @@ default E getFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     default E getLast() {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
diff --git a/src/java.base/share/classes/java/util/ListIterator.java b/src/java.base/share/classes/java/util/ListIterator.java
index 098b51abaa26..b92d41fd16f1 100644
--- a/src/java.base/share/classes/java/util/ListIterator.java
+++ b/src/java.base/share/classes/java/util/ListIterator.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -100,6 +101,7 @@ public interface ListIterator<E> extends Iterator<E> {
      * @throws NoSuchElementException if the iteration has no next element
      */
     @SideEffectsOnly("this")
+    @DoesNotUnrefineReceiver("modifiability")
     E next(@GuardSatisfied @NonEmpty ListIterator<E> this);
 
     /**
@@ -126,6 +128,7 @@ public interface ListIterator<E> extends Iterator<E> {
      * @throws NoSuchElementException if the iteration has no previous
      *         element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E previous(@GuardSatisfied ListIterator<E> this);
 
     /**
@@ -169,6 +172,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void remove(@Shrinkable @GuardSatisfied ListIterator<E> this);
 
     /**
@@ -191,6 +195,7 @@ public interface ListIterator<E> extends Iterator<E> {
      *         {@code add} have been called after the last call to
      *         {@code next} or {@code previous}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void set(@Replaceable @GuardSatisfied ListIterator<E> this, E e);
 
     /**
@@ -213,5 +218,6 @@ public interface ListIterator<E> extends Iterator<E> {
      * @throws IllegalArgumentException if some aspect of this element
      *         prevents it from being added to this list
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void add(@Growable @GuardSatisfied ListIterator<E> this, E e);
 }
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 1600c0c611e1..a21052e75bb3 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -28,14 +28,14 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
-import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -48,6 +48,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -310,6 +311,7 @@ public interface Map<K, V> {
     @ReleasesNoLocks
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable V put(@Growable @Replaceable @GuardSatisfied Map<K, V> this, K key, V value);
 
     /**
@@ -341,6 +343,7 @@ public interface Map<K, V> {
      *         map does not permit null keys ({@linkplain Collection##optional-restrictions optional})
      */
     @CFComment("nullness: key is not @Nullable because this map might not permit null values")
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable V remove(@Shrinkable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
 
@@ -367,6 +370,7 @@ public interface Map<K, V> {
      * @throws IllegalArgumentException if some property of a key or value in
      *         the specified map prevents it from being stored in this map
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void putAll(@Growable @Replaceable @GuardSatisfied Map<K, V> this, Map<? extends K, ? extends V> m);
 
     /**
@@ -376,6 +380,7 @@ public interface Map<K, V> {
      * @throws UnsupportedOperationException if the {@code clear} operation
      *         is not supported by this map
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void clear(@Shrinkable @GuardSatisfied Map<K, V> this);
 
 
@@ -397,7 +402,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyNonEmpty @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -415,7 +420,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyNonEmpty @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -434,7 +439,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyNonEmpty @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
@@ -540,6 +545,7 @@ interface Entry<K, V> {
          *         required to, throw this exception if the entry has been
          *         removed from the backing map.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         V setValue(Map.@Replaceable @GuardSatisfied Entry<K, V> this, V value);
 
         /**
@@ -705,6 +711,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @param o object to be compared for equality with this map
      * @return {@code true} if the specified object is equal to this map
      */
+    @Pure
     boolean equals(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
 
     /**
@@ -720,6 +727,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @see Object#equals(Object)
      * @see #equals(Object)
      */
+    @Pure
     int hashCode(@UnknownModifiability @GuardSatisfied Map<K, V> this);
 
     // Defaultable methods
@@ -777,6 +785,7 @@ default V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultV
      * removed during iteration
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void forEach(@NonLeaked BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K, V> entry : entrySet()) {
@@ -827,6 +836,7 @@ default void forEach(@NonLeaked BiConsumer<? super K, ? super V> action) {
      *         removed during iteration
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         for (Map.Entry<K, V> entry : entrySet()) {
@@ -894,6 +904,7 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      * @since 1.8
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {
         V v = get(key);
         if (v == null) {
@@ -938,6 +949,7 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      * @since 1.8
      */
     @CFComment("nullness: key and value are not @Nullable because this map might not permit null values")
+    @DoesNotUnrefineReceiver("modifiability")
     default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         Object curValue = get(key);
         if (!Objects.equals(curValue, value) ||
@@ -988,6 +1000,7 @@ default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSigne
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {
         Object curValue = get(key);
         if (!Objects.equals(curValue, oldValue) ||
@@ -1036,6 +1049,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         or value prevents it from being stored in this map
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {
         V curValue;
         if (((curValue = get(key)) != null) || containsKey(key)) {
@@ -1118,6 +1132,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyNull V computeIfAbsent(@Growable Map<K, V> this, K key,
             Function<? super K, ? extends @PolyNull V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
@@ -1195,6 +1210,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @Nullable V computeIfPresent(@Shrinkable @Replaceable Map<K, V> this, K key,
             BiFunction<? super K, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
@@ -1281,6 +1297,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         ({@linkplain Collection##optional-restrictions optional})
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @Nullable V compute(@Modifiable Map<K, V> this, K key,
             BiFunction<? super K, ? super @Nullable V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
@@ -1379,6 +1396,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      *         null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @Nullable V merge(@Modifiable Map<K, V> this, K key, @NonNull V value,
             BiFunction<? super V, ? super V, ? extends @Nullable V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index e110fe69db53..f7462ab489fa 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,11 +36,12 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
@@ -126,6 +127,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> lowerEntry(K key);
 
     /**
@@ -140,6 +142,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     @Nullable K lowerKey(K key);
 
     /**
@@ -155,6 +158,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> floorEntry(K key);
 
     /**
@@ -169,6 +173,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     @Nullable K floorKey(K key);
 
     /**
@@ -184,6 +189,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> ceilingEntry(K key);
 
     /**
@@ -198,6 +204,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     @Nullable K ceilingKey(K key);
 
     /**
@@ -213,6 +220,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> higherEntry(K key);
 
     /**
@@ -227,6 +235,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
+    @SideEffectFree
     @Nullable K higherKey(K key);
 
     /**
@@ -236,6 +245,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return an entry with the least key,
      *         or {@code null} if this map is empty
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> firstEntry();
 
     /**
@@ -245,6 +255,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return an entry with the greatest key,
      *         or {@code null} if this map is empty
      */
+    @SideEffectFree
     Map.@Nullable Entry<K,V> lastEntry();
 
     /**
@@ -254,6 +265,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed first entry of this map,
      *         or {@code null} if this map is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
@@ -263,6 +275,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return the removed last entry of this map,
      *         or {@code null} if this map is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied NavigableMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 300a891ff253..8c600a90b269 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -37,10 +37,11 @@
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
@@ -112,6 +113,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws NullPointerException if the specified element is null
      *         and this set does not permit null elements
      */
+    @Pure
     @Nullable E lower(E e);
 
     /**
@@ -126,6 +128,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws NullPointerException if the specified element is null
      *         and this set does not permit null elements
      */
+    @Pure
     @Nullable E floor(E e);
 
     /**
@@ -140,6 +143,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws NullPointerException if the specified element is null
      *         and this set does not permit null elements
      */
+    @Pure
     @Nullable E ceiling(E e);
 
     /**
@@ -154,6 +158,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws NullPointerException if the specified element is null
      *         and this set does not permit null elements
      */
+    @Pure
     @Nullable E higher(E e);
 
     /**
@@ -162,6 +167,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return the first element, or {@code null} if this set is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E pollFirst(@GuardSatisfied NavigableSet<E> this);
 
     /**
@@ -170,6 +176,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return the last element, or {@code null} if this set is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E pollLast(@GuardSatisfied NavigableSet<E> this);
 
     /**
@@ -178,7 +185,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @return an iterator over the elements in this set, in ascending order
      */
     @SideEffectFree
-    @PolyModifiable@PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> this);
+    @PolyModifiable@PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> this);
 
     /**
      * Returns a reverse order view of the elements contained in this set.
@@ -195,6 +202,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return a reverse order view of this set
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable NavigableSet<E> this);
 
     /**
@@ -203,6 +211,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      *
      * @return an iterator over the elements in this set, in descending order
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @PolyModifiable Iterator<E> descendingIterator(@PolyModifiable NavigableSet<E> this);
 
     /**
@@ -351,6 +360,7 @@ public interface NavigableSet<E> extends SortedSet<E> {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeFirst(@Shrinkable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
@@ -370,6 +380,7 @@ default E removeFirst(@Shrinkable NavigableSet<E> this) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeLast(@Shrinkable NavigableSet<E> this) {
         if (this.isEmpty()) {
             throw new NoSuchElementException();
@@ -390,6 +401,7 @@ default E removeLast(@Shrinkable NavigableSet<E> this) {
      * @return a reverse-ordered view of this collection, as a {@code NavigableSet}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyModifiable NavigableSet<E> reversed(@PolyModifiable NavigableSet<E> this) {
         return this.descendingSet();
     }
diff --git a/src/java.base/share/classes/java/util/PrimitiveIterator.java b/src/java.base/share/classes/java/util/PrimitiveIterator.java
index ed9efa28db27..150564d3774a 100644
--- a/src/java.base/share/classes/java/util/PrimitiveIterator.java
+++ b/src/java.base/share/classes/java/util/PrimitiveIterator.java
@@ -26,6 +26,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.util.function.Consumer;
@@ -90,6 +91,7 @@ public interface PrimitiveIterator<T, T_CONS> extends Iterator<T> {
      * @throws NullPointerException if the specified action is null
      */
     @SuppressWarnings("overloads")
+    @DoesNotUnrefineReceiver("modifiability")
     void forEachRemaining(T_CONS action);
 
     /**
@@ -105,6 +107,7 @@ public static interface OfInt extends PrimitiveIterator<Integer, IntConsumer> {
          * @return the next {@code int} element in the iteration
          * @throws NoSuchElementException if the iteration has no more elements
          */
+        @DoesNotUnrefineReceiver("modifiability")
         int nextInt(@NonEmpty OfInt this);
 
         /**
@@ -116,6 +119,7 @@ public static interface OfInt extends PrimitiveIterator<Integer, IntConsumer> {
          *         action.accept(nextInt());
          * }</pre>
          */
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(IntConsumer action) {
             Objects.requireNonNull(action);
             while (hasNext())
@@ -129,6 +133,7 @@ default void forEachRemaining(IntConsumer action) {
          * {@link #nextInt()}, and returns that boxed result.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default Integer next(PrimitiveIterator.@GuardSatisfied OfInt this) {
             if (Tripwire.ENABLED)
                 Tripwire.trip(getClass(), "{0} calling PrimitiveIterator.OfInt.nextInt()");
@@ -145,6 +150,7 @@ default Integer next(PrimitiveIterator.@GuardSatisfied OfInt this) {
          * and then passed to {@link #forEachRemaining}.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(Consumer<? super Integer> action) {
             if (action instanceof IntConsumer) {
                 forEachRemaining((IntConsumer) action);
@@ -173,6 +179,7 @@ public static interface OfLong extends PrimitiveIterator<Long, LongConsumer> {
          * @return the next {@code long} element in the iteration
          * @throws NoSuchElementException if the iteration has no more elements
          */
+        @DoesNotUnrefineReceiver("modifiability")
         long nextLong(@NonEmpty OfLong this);
 
         /**
@@ -184,6 +191,7 @@ public static interface OfLong extends PrimitiveIterator<Long, LongConsumer> {
          *         action.accept(nextLong());
          * }</pre>
          */
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(LongConsumer action) {
             Objects.requireNonNull(action);
             while (hasNext())
@@ -197,6 +205,7 @@ default void forEachRemaining(LongConsumer action) {
          * {@link #nextLong()}, and returns that boxed result.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default Long next(PrimitiveIterator.@GuardSatisfied OfLong this) {
             if (Tripwire.ENABLED)
                 Tripwire.trip(getClass(), "{0} calling PrimitiveIterator.OfLong.nextLong()");
@@ -213,6 +222,7 @@ default Long next(PrimitiveIterator.@GuardSatisfied OfLong this) {
          * and then passed to {@link #forEachRemaining}.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(Consumer<? super Long> action) {
             if (action instanceof LongConsumer) {
                 forEachRemaining((LongConsumer) action);
@@ -240,6 +250,7 @@ public static interface OfDouble extends PrimitiveIterator<Double, DoubleConsume
          * @return the next {@code double} element in the iteration
          * @throws NoSuchElementException if the iteration has no more elements
          */
+        @DoesNotUnrefineReceiver("modifiability")
         double nextDouble(@NonEmpty OfDouble this);
 
         /**
@@ -251,6 +262,7 @@ public static interface OfDouble extends PrimitiveIterator<Double, DoubleConsume
          *         action.accept(nextDouble());
          * }</pre>
          */
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(DoubleConsumer action) {
             Objects.requireNonNull(action);
             while (hasNext())
@@ -264,6 +276,7 @@ default void forEachRemaining(DoubleConsumer action) {
          * {@link #nextDouble()}, and returns that boxed result.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default Double next(PrimitiveIterator.@GuardSatisfied OfDouble this) {
             if (Tripwire.ENABLED)
                 Tripwire.trip(getClass(), "{0} calling PrimitiveIterator.OfDouble.nextLong()");
@@ -281,6 +294,7 @@ default Double next(PrimitiveIterator.@GuardSatisfied OfDouble this) {
          * {@link #forEachRemaining}.
          */
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         default void forEachRemaining(Consumer<? super Double> action) {
             if (action instanceof DoubleConsumer) {
                 forEachRemaining((DoubleConsumer) action);
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index b9dcca378005..02625197edd7 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -478,7 +478,6 @@ public boolean contains(@GuardSatisfied PriorityQueue<E> this, @GuardSatisfied @
      *         this queue
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         final int size = this.size;
         if (a.length < size)
@@ -497,7 +496,7 @@ public boolean contains(@GuardSatisfied PriorityQueue<E> this, @GuardSatisfied @
      * @return an iterator over the elements in this queue
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty PriorityQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty PriorityQueue<E> this) {
         return new Itr();
     }
 
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index a25c6f4be6f8..4ac828027799 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.propkey.qual.PropertyKey;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -238,6 +239,7 @@ private Properties(Properties defaults, int initialCapacity) {
      * @see #getProperty
      * @since    1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @Nullable Object setProperty(@GuardSatisfied Properties this, @PropertyKey String key, String value) {
         return put(key, value);
     }
@@ -1363,21 +1365,25 @@ public boolean containsKey(@GuardSatisfied @Nullable @UnknownSignedness Object k
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized Object put(Object key, Object value) {
         return map.put(key, value);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized Object remove(@GuardSatisfied @Nullable @UnknownSignedness Object key) {
         return map.remove(key);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void putAll(Map<?, ?> t) {
         map.putAll(t);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void clear() {
         map.clear();
     }
@@ -1424,7 +1430,9 @@ private EntrySet(Set<Map.Entry<Object, Object>> entrySet) {
         @Override public boolean contains(@UnknownSignedness Object o) { return entrySet.contains(o); }
         @Override public Object[] toArray() { return entrySet.toArray(); }
         @Override public <T> @Nullable T[] toArray(@PolyNull T[] a) { return entrySet.toArray(a); }
+        @DoesNotUnrefineReceiver("modifiability")
         @Override public void clear() { entrySet.clear(); }
+        @DoesNotUnrefineReceiver("modifiability")
         @Override public boolean remove(@UnknownSignedness Object o) { return entrySet.remove(o); }
 
         @Override
@@ -1459,11 +1467,13 @@ public String toString() {
         }
 
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
             return entrySet.removeAll(c);
         }
 
         @Override
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<? extends @UnknownSignedness Object> c) {
             return entrySet.retainAll(c);
         }
@@ -1474,11 +1484,13 @@ public Iterator<Map.Entry<Object, Object>> iterator() {
         }
     }
 
+    @Pure
     @Override
     public synchronized boolean equals(Object o) {
         return map.equals(o);
     }
 
+    @Pure
     @Override
     public synchronized int hashCode() {
         return map.hashCode();
@@ -1491,54 +1503,64 @@ public Object getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object k
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void forEach(BiConsumer<? super Object, ? super Object> action) {
         map.forEach(action);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void replaceAll(BiFunction<? super Object, ? super Object, ?> function) {
         map.replaceAll(function);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized Object putIfAbsent(Object key, Object value) {
         return map.putIfAbsent(key, value);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
         return map.remove(key, value);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean replace(Object key, Object oldValue, Object newValue) {
         return map.replace(key, oldValue, newValue);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized Object replace(Object key, Object value) {
         return map.replace(key, value);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull Object computeIfAbsent(Object key,
             Function<? super Object, ? extends @PolyNull Object> mappingFunction) {
         return map.computeIfAbsent(key, mappingFunction);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull Object computeIfPresent(Object key,
             BiFunction<? super Object, ? super Object, ? extends @PolyNull Object> remappingFunction) {
         return map.computeIfPresent(key, remappingFunction);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @PolyNull Object compute(Object key,
             BiFunction<? super Object, ? super Object, ? extends @PolyNull Object> remappingFunction) {
         return map.compute(key, remappingFunction);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized @Nullable Object merge(Object key, Object value,
             BiFunction<? super Object, ? super Object, ?> remappingFunction) {
         return map.merge(key, value, remappingFunction);
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index 284ae958a655..1d4f0b21191e 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -38,12 +38,13 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
@@ -169,6 +170,7 @@ public interface Queue<E> extends Collection<E> {
      *         prevents it from being added to this queue
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     boolean add(@Growable @GuardSatisfied Queue<E> this, E e);
 
     /**
@@ -188,6 +190,7 @@ public interface Queue<E> extends Collection<E> {
      * @throws IllegalArgumentException if some property of this element
      *         prevents it from being added to this queue
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean offer(@Growable Queue<E> this, E e);
 
     /**
@@ -198,6 +201,7 @@ public interface Queue<E> extends Collection<E> {
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Queue<E> this);
 
     /**
@@ -206,6 +210,7 @@ public interface Queue<E> extends Collection<E> {
      *
      * @return the head of this queue, or {@code null} if this queue is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink Queue<E> this);
 
     /**
@@ -216,6 +221,7 @@ public interface Queue<E> extends Collection<E> {
      * @return the head of this queue
      * @throws NoSuchElementException if this queue is empty
      */
+    @Pure
     E element(@GuardSatisfied @NonEmpty Queue<E> this);
 
     /**
@@ -224,5 +230,6 @@ public interface Queue<E> extends Collection<E> {
      *
      * @return the head of this queue, or {@code null} if this queue is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     @Nullable E peek();
 }
diff --git a/src/java.base/share/classes/java/util/RegularEnumSet.java b/src/java.base/share/classes/java/util/RegularEnumSet.java
index a898d1090df2..9b5a5e2dddaf 100644
--- a/src/java.base/share/classes/java/util/RegularEnumSet.java
+++ b/src/java.base/share/classes/java/util/RegularEnumSet.java
@@ -36,6 +36,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -63,15 +64,18 @@ final class RegularEnumSet<E extends Enum<E>> extends EnumSet<E> {
         super(elementType, universe);
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void addRange(E from, E to) {
         elements = (-1L >>>  (from.ordinal() - to.ordinal() - 1)) << from.ordinal();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void addAll() {
         if (universe.length != 0)
             elements = -1L >>> -universe.length;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     void complement() {
         if (universe.length != 0) {
             elements = ~elements;
@@ -89,6 +93,7 @@ void complement() {
      *
      * @return an iterator over the elements contained in this set
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty RegularEnumSet<E> this) {
         return new EnumSetIterator<>();
     }
@@ -126,6 +131,7 @@ public E next(@NonEmpty EnumSetIterator<E> this) {
             return (E) universe[Long.numberOfTrailingZeros(lastReturned)];
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastReturned == 0)
                 throw new IllegalStateException();
@@ -184,6 +190,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object e) {
      * @throws NullPointerException if {@code e} is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(E e) {
         typeCheck(e);
 
@@ -198,6 +205,7 @@ public boolean add(E e) {
      * @param e element to be removed from this set, if present
      * @return {@code true} if the set contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object e) {
         if (e == null)
             return false;
@@ -240,6 +248,7 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      * @throws NullPointerException if the specified collection or any
      *     of its elements are null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(Collection<? extends E> c) {
         if (!(c instanceof RegularEnumSet<?> es))
             return super.addAll(c);
@@ -265,6 +274,7 @@ public boolean addAll(Collection<? extends E> c) {
      * @return {@code true} if this set changed as a result of the call
      * @throws NullPointerException if the specified collection is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
         if (!(c instanceof RegularEnumSet<?> es))
             return super.removeAll(c);
@@ -285,6 +295,7 @@ public boolean removeAll(Collection<? extends @UnknownSignedness Object> c) {
      * @return {@code true} if this set changed as a result of the call
      * @throws NullPointerException if the specified collection is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(Collection<? extends @UnknownSignedness Object> c) {
         if (!(c instanceof RegularEnumSet<?> es))
             return super.retainAll(c);
@@ -303,6 +314,7 @@ public boolean retainAll(Collection<? extends @UnknownSignedness Object> c) {
     /**
      * Removes all of the elements from this set.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear() {
         elements = 0;
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderDequeView.java b/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
index a580ad8f7db3..38e62869d42a 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
@@ -157,6 +157,7 @@ public Stream<E> stream() {
         return StreamSupport.stream(spliterator(), false);
     }
 
+    @SideEffectFree
     public Object[] toArray() {
         return ArraysSupport.reverse(base.toArray());
     }
@@ -166,6 +167,7 @@ public <T> T[] toArray(T[] a) {
         return ArraysSupport.toArrayReversed(base, a);
     }
 
+    @SideEffectFree
     public <T> T[] toArray(IntFunction<T[]> generator) {
         return ArraysSupport.reverse(base.toArray(generator));
     }
@@ -201,14 +203,17 @@ public Iterator<E> descendingIterator() {
         return base.iterator();
     }
 
+    @Pure
     public E element() {
         return base.getLast();
     }
 
+    @Pure
     public E getFirst() {
         return base.getLast();
     }
 
+    @Pure
     public E getLast() {
         return base.getFirst();
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderListView.java b/src/java.base/share/classes/java/util/ReverseOrderListView.java
index 0f7409bef16d..4826354fb5ea 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderListView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderListView.java
@@ -106,6 +106,7 @@ public E next() {
             return it.previous();
         }
 
+        @Pure
         public boolean hasPrevious() {
             return it.hasNext();
         }
@@ -283,6 +284,7 @@ public Stream<E> stream() {
         return StreamSupport.stream(spliterator(), false);
     }
 
+    @SideEffectFree
     public Object[] toArray() {
         return ArraysSupport.reverse(base.toArray());
     }
@@ -292,6 +294,7 @@ public <T> T[] toArray(T[] a) {
         return ArraysSupport.toArrayReversed(base, a);
     }
 
+    @SideEffectFree
     public <T> T[] toArray(IntFunction<T[]> generator) {
         return ArraysSupport.reverse(base.toArray(generator));
     }
@@ -336,17 +339,22 @@ public boolean addAll(int index, Collection<? extends E> c) {
         }
     }
 
+    @Pure
     public E get(int i) {
         int size = base.size();
         Objects.checkIndex(i, size);
         return base.get(size - i - 1);
     }
 
+    @Pure
+    @StaticallyExecutable
     public int indexOf(Object o) {
         int i = base.lastIndexOf(o);
         return i == -1 ? -1 : base.size() - i - 1;
     }
 
+    @Pure
+    @StaticallyExecutable
     public int lastIndexOf(Object o) {
         int i = base.indexOf(o);
         return i == -1 ? -1 : base.size() - i - 1;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 404950e8fd54..60c1486e15f5 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -168,6 +168,7 @@ public V putLast(K k, V v) {
 
     // ========== SortedMap ==========
 
+    @Pure
     public Comparator<? super K> comparator() {
         return cmp;
     }
@@ -428,6 +429,7 @@ public int size() {
             return entrySet().size();
         }
 
+        @Pure
         public Comparator<? super K> comparator() {
             return cmp;
         }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
index 678c82fc311e..36774ea6454e 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
@@ -166,6 +166,7 @@ public Stream<E> stream() {
         return StreamSupport.stream(spliterator(), false);
     }
 
+    @SideEffectFree
     public Object[] toArray() {
         return ArraysSupport.reverse(base.toArray());
     }
@@ -175,18 +176,22 @@ public <T> T[] toArray(T[] a) {
         return ArraysSupport.toArrayReversed(base, a);
     }
 
+    @SideEffectFree
     public <T> T[] toArray(IntFunction<T[]> generator) {
         return ArraysSupport.reverse(base.toArray(generator));
     }
 
     // ========== SortedSet ==========
 
+    @Pure
     public Comparator<? super E> comparator() {
         return comp;
     }
 
+    @Pure
     public E first() { return base.last(); }
 
+    @Pure
     public E last() { return base.first(); }
 
     public SortedSet<E> headSet(E to) {
@@ -327,6 +332,7 @@ public int size() {
             return sz;
         }
 
+        @Pure
         public Comparator<? super E> comparator() {
             return ReverseOrderSortedSetView.this.comparator();
         }
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index af1567e64e52..eb0960b4c4eb 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -28,6 +28,7 @@
 
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 
 
 /**
@@ -92,6 +93,7 @@ public interface SequencedCollection<E> extends Collection<E> {
      *
      * @return a reverse-ordered view of this collection
      */
+    @DoesNotUnrefineReceiver("modifiability")
     SequencedCollection<E> reversed();
 
     /**
@@ -108,6 +110,7 @@ public interface SequencedCollection<E> extends Collection<E> {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void addFirst(@Growable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
@@ -126,6 +129,7 @@ default void addFirst(@Growable SequencedCollection<E> this, E e) {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default void addLast(@Growable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
@@ -142,6 +146,7 @@ default void addLast(@Growable SequencedCollection<E> this, E e) {
      * @return the retrieved element
      * @throws NoSuchElementException if this collection is empty
      */
+    @Pure
     default E getFirst() {
         return this.iterator().next();
     }
@@ -158,6 +163,7 @@ default E getFirst() {
      * @return the retrieved element
      * @throws NoSuchElementException if this collection is empty
      */
+    @Pure
     default E getLast() {
         return this.reversed().iterator().next();
     }
@@ -177,6 +183,7 @@ default E getLast() {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeFirst(@Shrinkable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
@@ -199,6 +206,7 @@ default E removeFirst(@Shrinkable SequencedCollection<E> this) {
      * @throws UnsupportedOperationException if this collection implementation
      *         does not support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeLast(@Shrinkable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 8a1f25ebc733..492615adabc0 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -28,10 +28,11 @@
 import jdk.internal.util.NullableKeyValueHolder;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 
 /**
  * A Map that has a well-defined encounter order, that supports operations at both ends, and
@@ -140,6 +141,7 @@ public interface SequencedMap<K, V> extends Map<K, V> {
      *
      * @return a reverse-ordered view of this map
      */
+    @DoesNotUnrefineReceiver("modifiability")
     SequencedMap<K, V> reversed();
 
     /**
@@ -154,6 +156,7 @@ public interface SequencedMap<K, V> extends Map<K, V> {
      * @return the first key-value mapping,
      *         or {@code null} if this map is empty
      */
+    @SideEffectFree
     default Map.Entry<K,V> firstEntry() {
         var it = entrySet().iterator();
         return it.hasNext() ? new NullableKeyValueHolder<>(it.next()) : null;
@@ -171,6 +174,7 @@ default Map.Entry<K,V> firstEntry() {
      * @return the last key-value mapping,
      *         or {@code null} if this map is empty
      */
+    @SideEffectFree
     default Map.Entry<K,V> lastEntry() {
         var it = reversed().entrySet().iterator();
         return it.hasNext() ? new NullableKeyValueHolder<>(it.next()) : null;
@@ -190,6 +194,7 @@ default Map.Entry<K,V> lastEntry() {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {
         var it = entrySet().iterator();
         if (it.hasNext()) {
@@ -215,6 +220,7 @@ default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
         var it = reversed().entrySet().iterator();
         if (it.hasNext()) {
@@ -241,6 +247,7 @@ default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -260,6 +267,7 @@ default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
      * @throws UnsupportedOperationException if this collection implementation does not
      *         support this operation
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -278,6 +286,7 @@ default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
      *
      * @return a {@code SequencedSet} view of this map's {@code keySet}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyShrink SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {
         class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
             Collection<K> view() {
@@ -311,6 +320,7 @@ public int hashCode() {
      *
      * @return a {@code SequencedCollection} view of this map's {@code values} collection
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyShrink SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {
         class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
             Collection<V> view() {
@@ -337,6 +347,7 @@ public SequencedCollection<V> reversed() {
      *
      * @return a {@code SequencedSet} view of this map's {@code entrySet}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyShrink SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
         class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
                 implements SequencedSet<Map.Entry<K, V>> {
diff --git a/src/java.base/share/classes/java/util/SequencedSet.java b/src/java.base/share/classes/java/util/SequencedSet.java
index c02bfc123ff8..d4bac4cd6747 100644
--- a/src/java.base/share/classes/java/util/SequencedSet.java
+++ b/src/java.base/share/classes/java/util/SequencedSet.java
@@ -25,6 +25,8 @@
 
 package java.util;
 
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+
 /**
  * A collection that is both a {@link SequencedCollection} and a {@link Set}. As such,
  * it can be thought of either as a {@code Set} that also has a well-defined
@@ -54,5 +56,6 @@ public interface SequencedSet<E> extends SequencedCollection<E>, Set<E> {
      *
      * @return a reverse-ordered view of this collection, as a {@code SequencedSet}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     SequencedSet<E> reversed();
 }
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 888f6f5e64b2..b8d6a3878110 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -28,11 +28,11 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -247,7 +248,6 @@ public interface Set<E> extends Collection<E> {
      *         set
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T> @Nullable T [] toArray(@UnknownModifiability Set<E> this, @PolyNull T[] a);
 
 
@@ -284,6 +284,7 @@ public interface Set<E> extends Collection<E> {
      *         prevents it from being added to this set
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     boolean add(@Growable @GuardSatisfied Set<E> this, E e);
 
 
@@ -308,6 +309,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code remove} operation
      *         is not supported by this set
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean remove(@Shrinkable @GuardSatisfied Set<E> this, @UnknownSignedness Object o);
 
 
@@ -358,6 +360,7 @@ public interface Set<E> extends Collection<E> {
      * @see #add(Object)
      */
     @EnsuresNonEmptyIf(result = true, expression = "this")
+    @DoesNotUnrefineReceiver("modifiability")
     boolean addAll(@Growable @GuardSatisfied Set<E> this, Collection<? extends E> c);
 
     /**
@@ -381,6 +384,7 @@ public interface Set<E> extends Collection<E> {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean retainAll(@Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
@@ -404,6 +408,7 @@ public interface Set<E> extends Collection<E> {
      * @see #remove(Object)
      * @see #contains(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     boolean removeAll(@Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
@@ -413,6 +418,7 @@ public interface Set<E> extends Collection<E> {
      * @throws UnsupportedOperationException if the {@code clear} method
      *         is not supported by this set
      */
+    @DoesNotUnrefineReceiver("modifiability")
     void clear(@Shrinkable @GuardSatisfied Set<E> this);
 
 
@@ -473,6 +479,7 @@ public interface Set<E> extends Collection<E> {
      * @since 1.8
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     default Spliterator<E> spliterator(@UnknownModifiability Set<E> this) {
         return Spliterators.spliterator(this, Spliterator.DISTINCT);
     }
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 4958e5a52acf..538636aef665 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -318,6 +319,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
      default V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -334,6 +336,7 @@ default V putFirst(K k, V v) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     default V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -348,6 +351,7 @@ default V putLast(K k, V v) {
      * @return a reverse-ordered view of this map, as a {@code SortedMap}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyModifiable SortedMap<K, V> reversed(@PolyModifiable SortedMap<K, V> this) {
         return ReverseOrderSortedMapView.of(this);
     }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index f185cbb43c26..0c82154527c3 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -226,7 +227,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      * @return the first (lowest) element currently in this set
      * @throws NoSuchElementException if this set is empty
      */
-    @SideEffectFree
+    @Pure
     E first(@GuardSatisfied @NonEmpty SortedSet<E> this);
 
     /**
@@ -235,7 +236,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      * @return the last (highest) element currently in this set
      * @throws NoSuchElementException if this set is empty
      */
-    @SideEffectFree
+    @Pure
     E last(@GuardSatisfied @NonEmpty SortedSet<E> this);
 
     /**
@@ -270,6 +271,7 @@ public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
      * @since 1.8
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     default Spliterator<E> spliterator() {
         return new Spliterators.IteratorSpliterator<E>(
                 this, Spliterator.DISTINCT | Spliterator.SORTED | Spliterator.ORDERED) {
@@ -294,6 +296,7 @@ public Comparator<? super E> getComparator() {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     default void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -310,6 +313,7 @@ default void addFirst(E e) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     default void addLast(E e) {
         throw new UnsupportedOperationException();
     }
@@ -323,6 +327,7 @@ default void addLast(E e) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     default E getFirst() {
         return this.first();
     }
@@ -336,6 +341,7 @@ default E getFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     default E getLast() {
         return this.last();
     }
@@ -352,6 +358,7 @@ default E getLast() {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeFirst(@Shrinkable SortedSet<E> this) {
         E e = this.first();
         this.remove(e);
@@ -370,6 +377,7 @@ default E removeFirst(@Shrinkable SortedSet<E> this) {
      * @throws UnsupportedOperationException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default E removeLast(@Shrinkable SortedSet<E> this) {
         E e = this.last();
         this.remove(e);
@@ -386,6 +394,7 @@ default E removeLast(@Shrinkable SortedSet<E> this) {
      * @return a reverse-ordered view of this collection, as a {@code SortedSet}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     default @PolyModifiable SortedSet<E> reversed(@PolyModifiable SortedSet<E> this) {
         return ReverseOrderSortedSetView.of(this);
     }
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 4a960c5b90db..53d7877ec5ac 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -33,6 +33,7 @@
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 
 /**
  * The {@code Stack} class represents a last-in-first-out
@@ -75,6 +76,7 @@ public Stack() {
      * @return  the {@code item} argument.
      * @see     java.util.Vector#addElement
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E push(@GuardSatisfied Stack<E> this, E item) {
         addElement(item);
 
@@ -89,6 +91,7 @@ public E push(@GuardSatisfied Stack<E> this, E item) {
      *          of the {@code Vector} object).
      * @throws  EmptyStackException  if this stack is empty.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized E pop(@GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {
         E       obj;
         int     len = size();
@@ -142,6 +145,7 @@ public boolean empty() {
      *          the object is located; the return value {@code -1}
      *          indicates that the object is not on the stack.
      */
+    @Pure
     public synchronized int search(Object o) {
         int i = lastIndexOf(o);
 
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index bea1bdc2742a..a9f5474fece6 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -29,11 +29,11 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -316,6 +317,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      *         and this map uses natural ordering, or its comparator
      *         does not permit null keys
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V get(@GuardSatisfied TreeMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
         Entry<K,V> p = getEntry(key);
         return (p==null ? null : p.value);
@@ -329,6 +331,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @SideEffectFree
     public @KeyFor("this") K firstKey(@NonEmpty TreeMap<K,V> this) {
         return key(getFirstEntry());
     }
@@ -336,6 +339,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @SideEffectFree
     public @KeyFor("this") K lastKey(@NonEmpty TreeMap<K,V> this) {
         return key(getLastEntry());
     }
@@ -349,6 +353,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -362,6 +367,7 @@ public V putFirst(K k, V v) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -378,6 +384,7 @@ public V putLast(K k, V v) {
      *         the specified map contains a null key and this map does not
      *         permit null keys
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, Map<? extends K, ? extends V> map) {
         int mapSize = map.size();
         if (size==0 && mapSize!=0 && map instanceof SortedMap) {
@@ -599,11 +606,13 @@ final Entry<K,V> getLowerEntry(K key) {
      *         does not permit null keys
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, K key, V value) {
         return put(key, value, true);
     }
 
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public V putIfAbsent(@Growable TreeMap<K,V> this, K key, V value) {
         return put(key, value, false);
     }
@@ -619,6 +628,7 @@ public V putIfAbsent(@Growable TreeMap<K,V> this, K key, V value) {
      * mapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public V computeIfAbsent(@Growable TreeMap<K,V> this, K key, Function<? super K, ? extends V> mappingFunction) {
         Objects.requireNonNull(mappingFunction);
         V newValue;
@@ -689,6 +699,7 @@ else if (cmp > 0)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public V computeIfPresent(@Shrinkable @Replaceable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Entry<K,V> oldEntry = getEntry(key);
@@ -710,6 +721,7 @@ public V computeIfPresent(@Shrinkable @Replaceable TreeMap<K,V> this, K key, BiF
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public V compute(@Modifiable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V newValue;
@@ -772,6 +784,7 @@ else if (cmp > 0)
      * remapping function modified this map
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public V merge(@Modifiable TreeMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Objects.requireNonNull(value);
@@ -946,6 +959,7 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      *         and this map uses natural ordering, or its comparator
      *         does not permit null keys
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Entry<K,V> p = getEntry(key);
         if (p == null)
@@ -960,6 +974,7 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         modCount++;
         size = 0;
@@ -972,6 +987,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *
      * @return a shallow copy of this map
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Modifiable Object clone(@GuardSatisfied TreeMap<K, V> this) {
         TreeMap<?,?> clone;
         try {
@@ -1002,6 +1018,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> firstEntry() {
         return exportEntry(getFirstEntry());
     }
@@ -1009,6 +1026,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> lastEntry() {
         return exportEntry(getLastEntry());
     }
@@ -1016,6 +1034,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         Entry<K,V> p = getFirstEntry();
         Map.Entry<K,V> result = exportEntry(p);
@@ -1027,6 +1046,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
     /**
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
         Entry<K,V> p = getLastEntry();
         Map.Entry<K,V> result = exportEntry(p);
@@ -1042,6 +1062,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> lowerEntry(K key) {
         return exportEntry(getLowerEntry(key));
     }
@@ -1053,6 +1074,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public @Nullable K lowerKey(K key) {
         return keyOrNull(getLowerEntry(key));
     }
@@ -1064,6 +1086,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> floorEntry(K key) {
         return exportEntry(getFloorEntry(key));
     }
@@ -1075,6 +1098,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public @Nullable K floorKey(K key) {
         return keyOrNull(getFloorEntry(key));
     }
@@ -1086,6 +1110,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> ceilingEntry(K key) {
         return exportEntry(getCeilingEntry(key));
     }
@@ -1097,6 +1122,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public @Nullable K ceilingKey(K key) {
         return keyOrNull(getCeilingEntry(key));
     }
@@ -1108,6 +1134,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public Map.@Nullable Entry<K,V> higherEntry(K key) {
         return exportEntry(getHigherEntry(key));
     }
@@ -1119,6 +1146,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
+    @SideEffectFree
     public @Nullable K higherKey(K key) {
         return keyOrNull(getHigherEntry(key));
     }
@@ -1159,6 +1187,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.  It does not support the {@code add} or {@code addAll}
      * operations.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
@@ -1506,12 +1535,19 @@ public Iterator<E> descendingIterator() {
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public boolean contains(@UnknownSignedness Object o) { return m.containsKey(o); }
         public void clear() { m.clear(); }
+        @Pure
         public E lower(E e) { return m.lowerKey(e); }
+        @Pure
         public E floor(E e) { return m.floorKey(e); }
+        @Pure
         public E ceiling(E e) { return m.ceilingKey(e); }
+        @Pure
         public E higher(E e) { return m.higherKey(e); }
+        @Pure
         public E first() { return m.firstKey(); }
+        @Pure
         public E last() { return m.lastKey(); }
+        @Pure
         public Comparator<? super E> comparator() { return m.comparator(); }
         public E pollFirst() {
             Map.Entry<E,?> e = m.pollFirstEntry();
@@ -2289,6 +2325,7 @@ static final class AscendingSubMap<K,V> extends NavigableSubMap<K,V> {
             super(m, fromStart, lo, loInclusive, toEnd, hi, hiInclusive);
         }
 
+        @Pure
         public Comparator<? super K> comparator() {
             return m.comparator();
         }
@@ -2381,6 +2418,7 @@ static final class DescendingSubMap<K,V>  extends NavigableSubMap<K,V> {
         private final Comparator<? super K> reverseComparator =
             Collections.reverseOrder(m.comparator);
 
+        @Pure
         public Comparator<? super K> comparator() {
             return reverseComparator;
         }
@@ -2491,6 +2529,7 @@ private Object readResolve() {
         public SortedMap<K,V> headMap(K toKey) { throw new InternalError(); }
         @SideEffectFree
         public SortedMap<K,V> tailMap(K fromKey) { throw new InternalError(); }
+        @Pure
         public Comparator<? super K> comparator() { throw new InternalError(); }
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 2b55d0553f94..0ac28bf313b3 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,8 +29,6 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -42,6 +40,7 @@
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -206,7 +205,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @return an iterator over the elements in this set in ascending order
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty TreeSet<E> this) {
         return m.navigableKeySet().iterator();
     }
 
@@ -216,13 +215,15 @@ public class TreeSet<E> extends AbstractSet<E>
      * @return an iterator over the elements in this set in descending order
      * @since 1.6
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty TreeSet<E> this) {
+    @DoesNotUnrefineReceiver("modifiability")
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty TreeSet<E> this) {
         return m.descendingKeySet().iterator();
     }
 
     /**
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable TreeSet<E> this) {
         return new TreeSet<>(m.descendingMap());
     }
@@ -287,6 +288,7 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
      *         does not permit null elements
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable @GuardSatisfied TreeSet<E> this, E e) {
         return m.put(e, PRESENT)==null;
     }
@@ -308,6 +310,7 @@ public boolean add(@Growable @GuardSatisfied TreeSet<E> this, E e) {
      *         and this set uses natural ordering, or its comparator
      *         does not permit null elements
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return m.remove(o)==PRESENT;
     }
@@ -316,6 +319,7 @@ public boolean remove(@Shrinkable @GuardSatisfied TreeSet<E> this, @GuardSatisfi
      * Removes all of the elements from this set.
      * The set will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         m.clear();
     }
@@ -331,6 +335,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeSet<E> this) {
      *         if any element is null and this set uses natural ordering, or
      *         its comparator does not permit null elements
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? extends E> c) {
         // Use linear-time version if applicable
         if (m.size()==0 && c.size() > 0 &&
@@ -354,7 +359,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink NavigableSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
+    public @PolyGrowShrink @PolyModifiable NavigableSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean fromInclusive,
                                   @GuardSatisfied E toElement,   boolean toInclusive) {
         return new TreeSet<>(m.subMap(fromElement, fromInclusive,
                                        toElement,   toInclusive));
@@ -369,7 +374,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink NavigableSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E toElement, boolean inclusive) {
+    public @PolyGrowShrink @PolyModifiable NavigableSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E toElement, boolean inclusive) {
         return new TreeSet<>(m.headMap(toElement, inclusive));
     }
 
@@ -382,7 +387,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink NavigableSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean inclusive) {
+    public @PolyGrowShrink @PolyModifiable NavigableSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, boolean inclusive) {
         return new TreeSet<>(m.tailMap(fromElement, inclusive));
     }
 
@@ -394,7 +399,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink SortedSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement) {
+    public @PolyGrowShrink @PolyModifiable SortedSet<E> subSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, @GuardSatisfied E fromElement, @GuardSatisfied E toElement) {
         return subSet(fromElement, true, toElement, false);
     }
 
@@ -406,7 +411,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink SortedSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E toElement) {
+    public @PolyGrowShrink @PolyModifiable SortedSet<E> headSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E toElement) {
         return headSet(toElement, false);
     }
 
@@ -418,7 +423,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink SortedSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E fromElement) {
+    public @PolyGrowShrink @PolyModifiable SortedSet<E> tailSet(@PolyModifiable @GuardSatisfied @PolyGrowShrink TreeSet<E> this, E fromElement) {
         return tailSet(fromElement, true);
     }
 
@@ -430,7 +435,7 @@ public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? e
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    @SideEffectFree
+    @Pure
     public E first(@GuardSatisfied @NonEmpty TreeSet<E> this) {
         return m.firstKey();
     }
@@ -438,7 +443,7 @@ public E first(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    @SideEffectFree
+    @Pure
     public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
         return m.lastKey();
     }
@@ -452,6 +457,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      *         does not permit null elements
      * @since 1.6
      */
+    @Pure
     public @Nullable E lower(E e) {
         return m.lowerKey(e);
     }
@@ -463,6 +469,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      *         does not permit null elements
      * @since 1.6
      */
+    @Pure
     public @Nullable E floor(E e) {
         return m.floorKey(e);
     }
@@ -474,6 +481,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      *         does not permit null elements
      * @since 1.6
      */
+    @Pure
     public @Nullable E ceiling(E e) {
         return m.ceilingKey(e);
     }
@@ -485,6 +493,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      *         does not permit null elements
      * @since 1.6
      */
+    @Pure
     public @Nullable E higher(E e) {
         return m.higherKey(e);
     }
@@ -492,6 +501,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     /**
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         Map.Entry<E,?> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
@@ -500,6 +510,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     /**
      * @since 1.6
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied TreeSet<E> this) {
         Map.Entry<E,?> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
@@ -514,6 +525,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(E e) {
         throw new UnsupportedOperationException();
     }
@@ -527,6 +539,7 @@ public void addFirst(E e) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(E e) {
         throw new UnsupportedOperationException();
     }
@@ -623,6 +636,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @return a {@code Spliterator} over the elements in this set
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Spliterator<E> spliterator() {
         return TreeMap.keySpliteratorFor(m);
     }
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 4093f4305b93..35c7c7f61bd9 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -43,6 +43,8 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -403,6 +405,7 @@ public boolean contains(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullabl
      *         this vector, or -1 if this vector does not contain the element
      */
     @Pure
+    @StaticallyExecutable
     public @GTENegativeOne int indexOf(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return indexOf(o, 0);
     }
@@ -424,6 +427,7 @@ public boolean contains(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullabl
      * @see     Object#equals(Object)
      */
     @Pure
+    @StaticallyExecutable
     public synchronized @GTENegativeOne int indexOf(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o, @NonNegative int index) {
         if (o == null) {
             for (int i = index ; i < elementCount ; i++)
@@ -449,6 +453,7 @@ public boolean contains(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullabl
      *         this vector, or -1 if this vector does not contain the element
      */
     @Pure
+    @StaticallyExecutable
     public synchronized @GTENegativeOne int lastIndexOf(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return lastIndexOf(o, elementCount-1);
     }
@@ -470,6 +475,7 @@ public boolean contains(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullabl
      *         than or equal to the current size of this vector
      */
     @Pure
+    @StaticallyExecutable
     public synchronized @GTENegativeOne int lastIndexOf(@GuardSatisfied Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o, @NonNegative int index) {
         if (index >= elementCount)
             throw new IndexOutOfBoundsException(index + " >= "+ elementCount);
@@ -553,6 +559,7 @@ public synchronized E lastElement(@NonEmpty Vector<E> this) {
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
         if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
@@ -580,6 +587,7 @@ public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> thi
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index >= size()})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void removeElementAt(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
         if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
@@ -620,6 +628,7 @@ else if (index < 0) {
      * @throws ArrayIndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
         if (index > elementCount) {
             throw new ArrayIndexOutOfBoundsException(index
@@ -648,6 +657,7 @@ public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> thi
      *
      * @param   obj   the component to be added
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void addElement(@Growable @GuardSatisfied Vector<E> this, E obj) {
         modCount++;
         add(obj, elementData, elementCount);
@@ -668,6 +678,7 @@ public synchronized void addElement(@Growable @GuardSatisfied Vector<E> this, E
      * @return  {@code true} if the argument was a component of this
      *          vector; {@code false} otherwise.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean removeElement(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Object obj) {
         modCount++;
         int i = indexOf(obj);
@@ -684,6 +695,7 @@ public synchronized boolean removeElement(@Shrinkable @GuardSatisfied @CanShrink
      * <p>This method is identical in functionality to the {@link #clear}
      * method (which is part of the {@link List} interface).
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
         final Object[] es = elementData;
         for (int to = elementCount, i = elementCount = 0; i < to; i++)
@@ -749,7 +761,6 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @throws NullPointerException if the given array is null
      * @since 1.2
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public synchronized <T> @Nullable T[] toArray(@PolyNull T[] a) {
         if (a.length < elementCount)
@@ -803,6 +814,7 @@ public synchronized E get(@GuardSatisfied Vector<E> this, @NonNegative int index
      *         ({@code index < 0 || index >= size()})
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized E set(@Replaceable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
         if (index >= elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
@@ -833,6 +845,7 @@ private void add(E e, Object[] elementData, int s) {
      */
     @SideEffectsOnly("this")
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean add(@Growable @GuardSatisfied Vector<E> this, E e) {
         modCount++;
         add(e, elementData, elementCount);
@@ -850,6 +863,7 @@ public synchronized boolean add(@Growable @GuardSatisfied Vector<E> this, E e) {
      * @return true if the Vector contained the specified element
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeElement(o);
     }
@@ -865,6 +879,7 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @Gu
      *         ({@code index < 0 || index > size()})
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void add(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
         insertElementAt(element, index);
     }
@@ -880,6 +895,7 @@ public void add(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index
      *         ({@code index < 0 || index >= size()})
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized E remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
         modCount++;
         if (index >= elementCount)
@@ -901,6 +917,7 @@ public synchronized E remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> th
      *
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
         removeAllElements();
     }
@@ -935,6 +952,7 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
      * @throws NullPointerException if the specified collection is null
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable @GuardSatisfied Vector<E> this, Collection<? extends E> c) {
         Object[] a = c.toArray();
         modCount++;
@@ -969,6 +987,7 @@ public boolean addAll(@Growable @GuardSatisfied Vector<E> this, Collection<? ext
      *         or if the specified collection is null
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -993,6 +1012,7 @@ public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this,
      *         or if the specified collection is null
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
@@ -1003,6 +1023,7 @@ public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this,
      */
     @SuppressWarnings({"unchecked"})
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink Vector<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1072,6 +1093,7 @@ private synchronized boolean bulkRemove(Predicate<? super E> filter) {
      * @throws NullPointerException if the specified collection is null
      * @since 1.2
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized boolean addAll(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, Collection<? extends E> c) {
         if (index < 0 || index > elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
@@ -1165,7 +1187,7 @@ public synchronized String toString(@GuardSatisfied Vector<E> this) {
      *         {@code (fromIndex > toIndex)}
      */
     @SideEffectFree
-    public synchronized @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink Vector<E> this, int fromIndex, int toIndex) {
+    public synchronized @PolyGrowShrink @PolyModifiable List<E> subList(@PolyModifiable @GuardSatisfied @PolyGrowShrink Vector<E> this, int fromIndex, int toIndex) {
         return Collections.synchronizedList(super.subList(fromIndex, toIndex),
                                             this);
     }
@@ -1177,6 +1199,7 @@ public synchronized String toString(@GuardSatisfied Vector<E> this) {
      * This call shortens the list by {@code (toIndex - fromIndex)} elements.
      * (If {@code toIndex==fromIndex}, this operation has no effect.)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     protected synchronized void removeRange(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, int fromIndex, int toIndex) {
         modCount++;
         shiftTailOverGap(elementData, fromIndex, toIndex);
@@ -1248,7 +1271,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public synchronized @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink Vector<E> this, @NonNegative int index) {
+    public synchronized @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable Vector<E> this, @NonNegative int index) {
         if (index < 0 || index > elementCount)
             throw new IndexOutOfBoundsException("Index: "+index);
         return new ListItr(index);
@@ -1262,7 +1285,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      *
      * @see #listIterator(int)
      */
-    public synchronized @PolyModifiable @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink Vector<E> this) {
+    public synchronized @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable Vector<E> this) {
         return new ListItr(0);
     }
 
@@ -1274,7 +1297,7 @@ private void writeObject(java.io.ObjectOutputStream s)
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public synchronized @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty Vector<E> this) {
+    public synchronized @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Vector<E> this) {
         return new Itr();
     }
 
@@ -1306,6 +1329,7 @@ public E next(@NonEmpty Itr this) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastRet == -1)
                 throw new IllegalStateException();
@@ -1354,14 +1378,17 @@ final class ListItr extends Itr implements ListIterator<E> {
             cursor = index;
         }
 
+        @Pure
         public boolean hasPrevious() {
             return cursor != 0;
         }
 
+        @Pure
         public int nextIndex() {
             return cursor;
         }
 
+        @Pure
         public int previousIndex() {
             return cursor - 1;
         }
@@ -1377,6 +1404,7 @@ public E previous() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void set(E e) {
             if (lastRet == -1)
                 throw new IllegalStateException();
@@ -1386,6 +1414,7 @@ public void set(E e) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(E e) {
             int i = cursor;
             synchronized (Vector.this) {
@@ -1402,6 +1431,7 @@ public void add(E e) {
      * @throws NullPointerException {@inheritDoc}
      */
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void forEach(Consumer<? super E> action) {
         Objects.requireNonNull(action);
         final int expectedModCount = modCount;
@@ -1418,6 +1448,7 @@ public synchronized void forEach(Consumer<? super E> action) {
      */
     @SuppressWarnings({"unchecked"})
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void replaceAll(@Replaceable Vector<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final int expectedModCount = modCount;
@@ -1433,6 +1464,7 @@ public synchronized void replaceAll(@Replaceable Vector<E> this, UnaryOperator<E
 
     @SuppressWarnings("unchecked")
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public synchronized void sort(@Replaceable Vector<E> this, Comparator<? super E> c) {
         final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, elementCount, c);
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 8f17e4c9a8c8..4efd83867b03 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -29,8 +29,8 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -488,6 +489,7 @@ Entry<K,V> getEntry(Object key) {
      *         previously associated {@code null} with {@code key}.)
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {
         Object k = maskNull(key);
         int h = hash(k);
@@ -580,6 +582,7 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      * @param m mappings to be stored in this map.
      * @throws  NullPointerException if the specified map is null.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {
         int numKeysToBeAdded = m.size();
         if (numKeysToBeAdded == 0)
@@ -629,6 +632,7 @@ public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this
      * @return the previous value associated with {@code key}, or
      *         {@code null} if there was no mapping for {@code key}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         Object k = maskNull(key);
         int h = hash(k);
@@ -688,6 +692,7 @@ boolean removeMapping(Object o) {
      * Removes all of the mappings from this map.
      * The map will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         // clear out ref queue. We don't need to expunge entries
         // since table is getting cleared.
@@ -760,20 +765,24 @@ private static class Entry<K,V> extends WeakReference<Object> implements Map.Ent
         }
 
         @SuppressWarnings("unchecked")
+        @Pure
         public K getKey() {
             return (K) WeakHashMap.unmaskNull(get());
         }
 
+        @Pure
         public V getValue() {
             return value;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V setValue(V newValue) {
             V oldValue = value;
             value = newValue;
             return oldValue;
         }
 
+        @Pure
         public boolean equals(Object o) {
             if (!(o instanceof Map.Entry<?, ?> e))
                 return false;
@@ -788,6 +797,7 @@ public boolean equals(Object o) {
             return false;
         }
 
+        @Pure
         public int hashCode() {
             K k = getKey();
             V v = getValue();
@@ -859,6 +869,7 @@ protected Entry<K,V> nextEntry() {
             return lastReturned;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastReturned == null)
                 throw new IllegalStateException();
@@ -935,6 +946,7 @@ public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsKey(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             if (containsKey(o)) {
                 WeakHashMap.this.remove(o);
@@ -944,6 +956,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
                 return false;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             WeakHashMap.this.clear();
         }
@@ -994,6 +1007,7 @@ public boolean contains(@Nullable @UnknownSignedness Object o) {
             return containsValue(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             WeakHashMap.this.clear();
         }
@@ -1038,6 +1052,7 @@ && getEntry(e.getKey()) != null
                     && getEntry(e.getKey()).equals(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             return removeMapping(o);
         }
@@ -1047,6 +1062,7 @@ public boolean remove(@Nullable @UnknownSignedness Object o) {
             return WeakHashMap.this.size();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             WeakHashMap.this.clear();
         }
@@ -1063,7 +1079,6 @@ public Object[] toArray() {
             return deepCopy().toArray();
         }
 
-        @SideEffectFree
         public <T> @Nullable T[] toArray(@PolyNull T[] a) {
             return deepCopy().toArray(a);
         }
@@ -1076,6 +1091,7 @@ public Spliterator<Map.Entry<K,V>> spliterator() {
 
     @SuppressWarnings("unchecked")
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         int expectedModCount = modCount;
@@ -1098,6 +1114,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
 
     @SuppressWarnings("unchecked")
     @Override
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable WeakHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         Objects.requireNonNull(function);
         int expectedModCount = modCount;
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index aaa8c668f02f..6d1e38280473 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -51,6 +51,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -347,6 +348,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable ArrayBlockingQueue<E> this, E e) {
         return super.add(e);
     }
@@ -360,6 +362,7 @@ public boolean add(@Growable ArrayBlockingQueue<E> this, E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable ArrayBlockingQueue<E> this, E e) {
         Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
@@ -383,6 +386,7 @@ public boolean offer(@Growable ArrayBlockingQueue<E> this, E e) {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable ArrayBlockingQueue<E> this, E e) throws InterruptedException {
         Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
@@ -404,6 +408,7 @@ public void put(@Growable ArrayBlockingQueue<E> this, E e) throws InterruptedExc
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
 
@@ -424,6 +429,7 @@ public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, Ti
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -434,6 +440,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this)
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -446,6 +453,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this)
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
@@ -531,6 +539,7 @@ public int remainingCapacity() {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
@@ -682,6 +691,7 @@ public String toString() {
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -721,6 +731,7 @@ private static void circularClear(Object[] items, int i, int end) {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
@@ -731,6 +742,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E>
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -783,7 +795,7 @@ else if (i > take)
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ArrayBlockingQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ArrayBlockingQueue<E> this) {
         return new Itr();
     }
 
@@ -1296,6 +1308,7 @@ public void forEachRemaining(Consumer<? super E> action) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             final ReentrantLock lock = ArrayBlockingQueue.this.lock;
             lock.lock();
@@ -1497,6 +1510,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1505,6 +1519,7 @@ public boolean removeIf(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Predi
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1513,6 +1528,7 @@ public boolean removeAll(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Coll
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 1affce11f660..2750df4daa55 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -38,11 +38,11 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -55,6 +55,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -665,16 +666,21 @@ static class Node<K,V> implements Map.Entry<K,V> {
             this.next = next;
         }
 
+        @Pure
         public final K getKey()     { return key; }
+        @Pure
         public final V getValue()   { return val; }
+        @Pure
         public final int hashCode() { return key.hashCode() ^ val.hashCode(); }
         public final String toString() {
             return Helpers.mapEntryToString(key, val);
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final V setValue(V value) {
             throw new UnsupportedOperationException();
         }
 
+        @Pure
         public final boolean equals(Object o) {
             Object k, v, u; Map.Entry<?,?> e;
             return ((o instanceof Map.Entry) &&
@@ -1036,6 +1042,7 @@ public boolean containsValue(@GuardSatisfied @UnknownSignedness Object value) {
      * @throws NullPointerException if the specified key or value is null
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V put(@Growable @Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
         return putVal(key, value, false);
     }
@@ -1117,6 +1124,7 @@ else if (f instanceof ReservationNode)
      *
      * @param m mappings to be stored in this map
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putAll(@Growable @Replaceable ConcurrentHashMap<K,V> this, Map<? extends K, ? extends V> m) {
         tryPresize(m.size());
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
@@ -1132,6 +1140,7 @@ public void putAll(@Growable @Replaceable ConcurrentHashMap<K,V> this, Map<? ext
      *         {@code null} if there was no mapping for {@code key}
      * @throws NullPointerException if the specified key is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
         return replaceNode(key, null, null);
     }
@@ -1217,6 +1226,7 @@ else if (f instanceof ReservationNode)
     /**
      * Removes all of the mappings from this map.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable ConcurrentHashMap<K,V> this) {
         long delta = 0L; // negative number of deletions
         int i = 0;
@@ -1577,6 +1587,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @throws NullPointerException if the specified key or value is null
      */
     @EnsuresKeyFor(value={"#1"}, map={"this"})
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V putIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, V value) {
         return putVal(key, value, true);
     }
@@ -1586,6 +1597,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @throws NullPointerException if the specified key is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         if (key == null)
             throw new NullPointerException();
@@ -1597,6 +1609,7 @@ public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @
      *
      * @throws NullPointerException if any of the arguments are null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldValue, V newValue) {
         if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
@@ -1610,6 +1623,7 @@ public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldVal
      *         or {@code null} if there was no mapping for the key
      * @throws NullPointerException if the specified key or value is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable V replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
         if (key == null || value == null)
             throw new NullPointerException();
@@ -1635,6 +1649,7 @@ public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultVa
         return (v = get(key)) == null ? defaultValue : v;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(BiConsumer<? super K, ? super V> action) {
         if (action == null) throw new NullPointerException();
         Node<K,V>[] t;
@@ -1646,6 +1661,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable ConcurrentHashMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null) throw new NullPointerException();
         Node<K,V>[] t;
@@ -1729,6 +1745,7 @@ boolean removeValueIf(Predicate<? super V> function) {
      * @throws RuntimeException or Error if the mappingFunction does so,
      *         in which case the mapping is left unestablished
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (key == null || mappingFunction == null)
             throw new NullPointerException();
@@ -1841,6 +1858,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfPresent(@Shrinkable @Replaceable ConcurrentHashMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1935,6 +1953,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V compute(@Modifiable ConcurrentHashMap<K,V> this, K key,
                      BiFunction<? super K, ? super @Nullable V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
@@ -2064,6 +2083,7 @@ else if (f instanceof ReservationNode)
      * @throws RuntimeException or Error if the remappingFunction does so,
      *         in which case the mapping is unchanged
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V merge(@Modifiable ConcurrentHashMap<K,V> this, K key, @NonNull V value, BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || value == null || remappingFunction == null)
             throw new NullPointerException();
@@ -3485,6 +3505,7 @@ static class BaseIterator<K,V> extends Traverser<K,V> {
         @Pure
         public final boolean hasMoreElements() { return next != null; }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             Node<K,V> p;
             if ((p = lastReturned) == null)
@@ -3565,8 +3586,11 @@ public final Map.Entry<K,V> next(@NonEmpty EntryIterator<K,V> this) {
             this.val = val;
             this.map = map;
         }
+        @Pure
         public K getKey()        { return key; }
+        @Pure
         public V getValue()      { return val; }
+        @Pure
         public int hashCode()    { return key.hashCode() ^ val.hashCode(); }
         public String toString() {
             return Helpers.mapEntryToString(key, val);
@@ -3589,6 +3613,7 @@ public boolean equals(Object o) {
          * could even have been removed, in which case the put will
          * re-establish). We do not and cannot guarantee more.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public V setValue(V value) {
             if (value == null) throw new NullPointerException();
             V v = val;
@@ -4480,6 +4505,7 @@ abstract static sealed class CollectionView<K,V,E>
          * Removes all of the elements from this view, by removing all
          * the mappings from the map backing this view.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public final void clear()      { map.clear(); }
         @Pure
         public final int size()        { return map.size(); }
@@ -4502,6 +4528,7 @@ abstract static sealed class CollectionView<K,V,E>
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public abstract boolean contains(@UnknownSignedness Object o);
+        @DoesNotUnrefineReceiver("modifiability")
         public abstract boolean remove(@UnknownSignedness Object o);
 
         private static final String OOME_MSG = "Required array size too large";
@@ -4529,7 +4556,6 @@ abstract static sealed class CollectionView<K,V,E>
             return (i == n) ? r : Arrays.copyOf(r, i);
         }
 
-        @SideEffectFree
         @SuppressWarnings("unchecked")
         public final <T> @Nullable T[] toArray(@PolyNull T[] a) {
             long sz = map.mappingCount();
@@ -4598,6 +4624,7 @@ public final boolean containsAll(Collection<? extends @NonNull @UnknownSignednes
             return true;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
             if (c == null) throw new NullPointerException();
             boolean modified = false;
@@ -4620,6 +4647,7 @@ public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object
             return modified;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
             if (c == null) throw new NullPointerException();
             boolean modified = false;
@@ -4684,6 +4712,7 @@ public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness
          * @return {@code true} if the backing map contained the specified key
          * @throws NullPointerException if the specified key is null
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) { return map.remove(o) != null; }
 
         /**
@@ -4708,6 +4737,7 @@ public Iterator<K> iterator() {
          * for additions was provided
          */
         @EnsuresNonEmpty("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(K e) {
             V v;
             if ((v = value) == null)
@@ -4726,6 +4756,7 @@ public boolean add(K e) {
          * @throws UnsupportedOperationException if no default mapped value
          * for additions was provided
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends K> c) {
             boolean added = false;
             V v;
@@ -4787,6 +4818,7 @@ public final boolean contains(@UnknownSignedness Object o) {
             return map.containsValue(o);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean remove(@UnknownSignedness Object o) {
             if (o != null) {
                 for (Iterator<V> it = iterator(); it.hasNext();) {
@@ -4808,9 +4840,11 @@ public final Iterator<V> iterator() {
         }
 
         @EnsuresNonEmpty("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean add(V e) {
             throw new UnsupportedOperationException();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public final boolean addAll(Collection<? extends V> c) {
             throw new UnsupportedOperationException();
         }
@@ -4827,6 +4861,7 @@ public final boolean addAll(Collection<? extends V> c) {
             return modified;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super V> filter) {
             return map.removeValueIf(filter);
         }
@@ -4892,10 +4927,12 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @EnsuresNonEmpty("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(Entry<K,V> e) {
             return map.putVal(e.getKey(), e.getValue(), false) == null;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends Entry<K,V>> c) {
             boolean added = false;
             for (Entry<K,V> e : c) {
@@ -4905,6 +4942,7 @@ public boolean addAll(Collection<? extends Entry<K,V>> c) {
             return added;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super Entry<K,V>> filter) {
             return map.removeEntryIf(filter);
         }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 3e526a303926..7fce4bc51a8c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -52,6 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -846,6 +847,7 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
     }
@@ -859,6 +861,7 @@ public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
     }
@@ -870,6 +873,7 @@ public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
      * @return {@code true} (as specified by {@link Deque#offerFirst})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
         return true;
@@ -884,6 +888,7 @@ public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
      * @return {@code true} (as specified by {@link Deque#offerLast})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
         return true;
@@ -924,6 +929,7 @@ public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E getFirst(@NonEmpty ConcurrentLinkedDeque<E> this) {
         return screenNullResult(peekFirst());
     }
@@ -931,10 +937,12 @@ public E getFirst(@NonEmpty ConcurrentLinkedDeque<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
         return screenNullResult(peekLast());
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         restart: for (;;) {
             for (Node<E> first = first(), p = first;;) {
@@ -956,6 +964,7 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         restart: for (;;) {
             for (Node<E> last = last(), p = last;;) {
@@ -980,6 +989,7 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
         return screenNullResult(pollFirst());
     }
@@ -987,6 +997,7 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Concurrent
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
         return screenNullResult(pollLast());
     }
@@ -1000,6 +1011,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentL
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable ConcurrentLinkedDeque<E> this, E e) {
         return offerLast(e);
     }
@@ -1013,10 +1025,12 @@ public boolean offer(@Growable ConcurrentLinkedDeque<E> this, E e) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
         return offerLast(e);
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this)           { return pollFirst(); }
     @Pure
     public @Nullable E peek()           { return peekFirst(); }
@@ -1024,21 +1038,25 @@ public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)         { return removeFirst(); }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)            { return removeFirst(); }
 
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @SideEffectFree
     public E element(@NonEmpty ConcurrentLinkedDeque<E> this)        { return getFirst(); }
 
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void push(@Growable ConcurrentLinkedDeque<E> this, E e)     { addFirst(e); }
 
     /**
@@ -1053,6 +1071,7 @@ public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeFirstOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
         Objects.requireNonNull(o);
         for (Node<E> p = first(); p != null; p = succ(p)) {
@@ -1079,6 +1098,7 @@ public boolean removeFirstOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDequ
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeLastOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
         Objects.requireNonNull(o);
         for (Node<E> p = last(); p != null; p = pred(p)) {
@@ -1171,6 +1191,7 @@ public int size() {
      * @return {@code true} if the deque contained the specified element
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
@@ -1187,6 +1208,7 @@ public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, @Gua
      *         of its elements are null
      * @throws IllegalArgumentException if the collection is this deque
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable ConcurrentLinkedDeque<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
@@ -1241,6 +1263,7 @@ else if (p.prev == p) // NEXT_TERMINATOR
     /**
      * Removes all of the elements from this deque.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
         while (pollFirst() != null)
             ;
@@ -1357,7 +1380,6 @@ else if (a != null && size <= a.length) {
      *         this deque
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         if (a == null) throw new NullPointerException();
@@ -1374,7 +1396,7 @@ else if (a != null && size <= a.length) {
      * @return an iterator over the elements in this deque in proper sequence
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
         return new Itr();
     }
 
@@ -1388,7 +1410,7 @@ else if (a != null && size <= a.length) {
      *
      * @return an iterator over the elements in this deque in reverse order
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentLinkedDeque<E> this) {
         return new DescendingItr();
     }
 
@@ -1457,6 +1479,7 @@ public E next(@NonEmpty AbstractItr this) {
             return item;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             Node<E> l = lastRet;
             if (l == null) throw new IllegalStateException();
@@ -1642,6 +1665,7 @@ private void readObject(java.io.ObjectInputStream s)
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1650,6 +1674,7 @@ public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Pr
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1658,6 +1683,7 @@ public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, C
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index b24e1d8d588d..1e289de70597 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -51,6 +51,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -302,6 +303,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable ConcurrentLinkedQueue<E> this, E e) {
         return offer(e);
     }
@@ -374,6 +376,7 @@ private Node<E> skipDeadNodes(Node<E> pred, Node<E> c, Node<E> p, Node<E> q) {
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable ConcurrentLinkedQueue<E> this, E e) {
         final Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
 
@@ -403,6 +406,7 @@ else if (p == q)
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
         restartFromHead: for (;;) {
             for (Node<E> h = head, p = h, q;; p = q) {
@@ -547,6 +551,7 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         if (o == null) return false;
         restartFromHead: for (;;) {
@@ -583,6 +588,7 @@ public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, @Gua
      *         of its elements are null
      * @throws IllegalArgumentException if the collection is this queue
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable ConcurrentLinkedQueue<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
@@ -740,7 +746,6 @@ else if (a != null && size <= a.length) {
      *         this queue
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     @SuppressWarnings("unchecked")
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         Objects.requireNonNull(a);
@@ -757,7 +762,7 @@ else if (a != null && size <= a.length) {
      * @return an iterator over the elements in this queue in proper sequence
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentLinkedQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentLinkedQueue<E> this) {
         return new Itr();
     }
 
@@ -829,6 +834,7 @@ public E next(@NonEmpty Itr this) {
 
         // Default implementation of forEachRemaining is "good enough".
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             Node<E> l = lastRet;
             if (l == null) throw new IllegalStateException();
@@ -995,6 +1001,7 @@ public Spliterator<E> spliterator() {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1003,6 +1010,7 @@ public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Pr
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1011,11 +1019,13 @@ public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, C
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
         bulkRemove(e -> true);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 8397bc488ab4..765bfdf01198 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,13 +37,13 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.Unmodifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
+import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
@@ -52,6 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -1332,6 +1333,7 @@ public boolean containsKey(@GuardSatisfied @UnknownSignedness Object key) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public V get(Object key) {
         return doGet(key);
     }
@@ -1366,6 +1368,7 @@ public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultVa
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (value == null)
             throw new NullPointerException();
@@ -1382,6 +1385,7 @@ public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V va
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
         return doRemove(key, null);
     }
@@ -1437,6 +1441,7 @@ public boolean isEmpty() {
     /**
      * Removes all of the mappings from this map.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         Index<K,V> h, r, d; Node<K,V> b;
         VarHandle.acquireFence();
@@ -1482,6 +1487,7 @@ else if ((d = h.down) != null)    // remove levels
      *         or the mappingFunction is null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key,
                              Function<? super K, ? extends @PolyNull V> mappingFunction) {
         if (key == null || mappingFunction == null)
@@ -1506,6 +1512,7 @@ else if ((d = h.down) != null)    // remove levels
      *         or the remappingFunction is null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V computeIfPresent(@Shrinkable @Replaceable ConcurrentSkipListMap<K,V> this, K key,
                               BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
@@ -1538,6 +1545,7 @@ else if (doRemove(key, v) != null)
      *         or the remappingFunction is null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V compute(@Modifiable ConcurrentSkipListMap<K,V> this, K key,
                      BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
@@ -1577,6 +1585,7 @@ else if (doRemove(key, v) != null)
      *         or the remappingFunction is null
      * @since 1.8
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @PolyNull V merge(@Modifiable ConcurrentSkipListMap<K,V> this, K key, @NonNull V value,
                    BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || value == null || remappingFunction == null)
@@ -1816,6 +1825,7 @@ public boolean equals(@Nullable Object o) {
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (value == null)
             throw new NullPointerException();
@@ -1829,6 +1839,7 @@ public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value)
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
         if (key == null)
             throw new NullPointerException();
@@ -1842,6 +1853,7 @@ public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfi
      *         with the keys currently in the map
      * @throws NullPointerException if any of the arguments are null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V oldValue, V newValue) {
         if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
@@ -1867,6 +1879,7 @@ public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V ol
      *         with the keys currently in the map
      * @throws NullPointerException if the specified key or value is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public V replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
         if (key == null || value == null)
             throw new NullPointerException();
@@ -1881,6 +1894,7 @@ public V replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
 
     /* ------ SortedMap API methods ------ */
 
+    @Pure
     public Comparator<? super K> comparator() {
         return comparator;
     }
@@ -1888,6 +1902,7 @@ public Comparator<? super K> comparator() {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public K firstKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
         Node<K,V> n = findFirst();
         if (n == null)
@@ -1898,6 +1913,7 @@ public K firstKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
         Node<K,V> n = findLast();
         if (n == null)
@@ -1914,6 +1930,7 @@ public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
      public V putFirst(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -1927,6 +1944,7 @@ public V putFirst(K k, V v) {
      * @since 21
      */
     @ThrowsUOE
+    @DoesNotUnrefineReceiver("modifiability")
     public V putLast(K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -2016,6 +2034,7 @@ public V putLast(K k, V v) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> lowerEntry(K key) {
         return findNearEntry(key, LT, comparator);
     }
@@ -2024,6 +2043,7 @@ public V putLast(K k, V v) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public K lowerKey(K key) {
         Node<K,V> n = findNear(key, LT, comparator);
         return (n == null) ? null : n.key;
@@ -2039,6 +2059,7 @@ public K lowerKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> floorEntry(K key) {
         return findNearEntry(key, LT|EQ, comparator);
     }
@@ -2048,6 +2069,7 @@ public K lowerKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public K floorKey(K key) {
         Node<K,V> n = findNear(key, LT|EQ, comparator);
         return (n == null) ? null : n.key;
@@ -2062,6 +2084,7 @@ public K floorKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> ceilingEntry(K key) {
         return findNearEntry(key, GT|EQ, comparator);
     }
@@ -2070,6 +2093,7 @@ public K floorKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public K ceilingKey(K key) {
         Node<K,V> n = findNear(key, GT|EQ, comparator);
         return (n == null) ? null : n.key;
@@ -2085,6 +2109,7 @@ public K ceilingKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> higherEntry(K key) {
         return findNearEntry(key, GT, comparator);
     }
@@ -2094,6 +2119,7 @@ public K ceilingKey(K key) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified key is null
      */
+    @Pure
     public K higherKey(K key) {
         Node<K,V> n = findNear(key, GT, comparator);
         return (n == null) ? null : n.key;
@@ -2105,6 +2131,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> firstEntry() {
         return findFirstEntry();
     }
@@ -2115,6 +2142,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
+    @Pure
     public Map.@Unmodifiable Entry<K,V> lastEntry() {
         return findLastEntry();
     }
@@ -2125,6 +2153,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Map.@Unmodifiable Entry<K,V> pollFirstEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         return doRemoveFirstEntry();
     }
@@ -2135,6 +2164,7 @@ public K higherKey(K key) {
      * The returned entry does <em>not</em> support
      * the {@code Entry.setValue} method.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public Map.@Unmodifiable Entry<K,V> pollLastEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
         return doRemoveLastEntry();
     }
@@ -2175,6 +2205,7 @@ final void advance(Node<K,V> b) {
             next = n;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             Node<K,V> n; K k;
             if ((n = lastReturned) == null || (k = n.key) == null)
@@ -2247,19 +2278,30 @@ static final class KeySet<K,V>
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public boolean contains(@UnknownSignedness Object o) { return m.containsKey(o); }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) { return m.remove(o) != null; }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() { m.clear(); }
+        @Pure
         public K lower(K e) { return m.lowerKey(e); }
+        @Pure
         public K floor(K e) { return m.floorKey(e); }
+        @Pure
         public K ceiling(K e) { return m.ceilingKey(e); }
+        @Pure
         public K higher(K e) { return m.higherKey(e); }
+        @Pure
         public Comparator<? super K> comparator() { return m.comparator(); }
+        @Pure
         public K first() { return m.firstKey(); }
+        @Pure
         public K last() { return m.lastKey(); }
+        @DoesNotUnrefineReceiver("modifiability")
         public K pollFirst() {
             Map.Entry<K,V> e = m.pollFirstEntry();
             return (e == null) ? null : e.getKey();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public K pollLast() {
             Map.Entry<K,V> e = m.pollLastEntry();
             return (e == null) ? null : e.getKey();
@@ -2337,6 +2379,7 @@ public Iterator<V> iterator() {
         @Pure
         @EnsuresNonEmptyIf(result = true, expression = "this")
         public boolean contains(@UnknownSignedness Object o) { return m.containsValue(o); }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() { m.clear(); }
         public Object[] toArray()     { return toList(this).toArray();  }
         public <T> @Nullable T[] toArray(@PolyNull T[] a) { return toList(this).toArray(a); }
@@ -2347,6 +2390,7 @@ public Spliterator<V> spliterator() {
                 : ((SubMap<K,V>)m).new SubMapValueIterator();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super V> filter) {
             if (filter == null) throw new NullPointerException();
             if (m instanceof ConcurrentSkipListMap)
@@ -2385,6 +2429,7 @@ public boolean contains(@UnknownSignedness Object o) {
             V v = m.get(e.getKey());
             return v != null && v.equals(e.getValue());
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@UnknownSignedness Object o) {
             if (!(o instanceof Map.Entry))
                 return false;
@@ -2401,6 +2446,7 @@ public boolean isEmpty() {
         public int size() {
             return m.size();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             m.clear();
         }
@@ -2424,6 +2470,7 @@ public Spliterator<Map.Entry<K,V>> spliterator() {
                 ? ((ConcurrentSkipListMap<K,V>)m).entrySpliterator()
                 : ((SubMap<K,V>)m).new SubMapEntryIterator();
         }
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super Entry<K,V>> filter) {
             if (filter == null) throw new NullPointerException();
             if (m instanceof ConcurrentSkipListMap)
@@ -2705,16 +2752,19 @@ public boolean containsKey(@UnknownSignedness Object key) {
             return inBounds(key, m.comparator) && m.containsKey(key);
         }
 
+        @Pure
         public V get(Object key) {
             if (key == null) throw new NullPointerException();
             return (!inBounds(key, m.comparator)) ? null : m.get(key);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V put(@Growable @Replaceable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.put(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V remove(@Shrinkable SubMap<K,V> this, Object key) {
             return (!inBounds(key, m.comparator)) ? null : m.remove(key);
         }
@@ -2754,6 +2804,7 @@ public boolean containsValue(@UnknownSignedness Object value) {
             return false;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear(@Shrinkable SubMap<K,V> this) {
             Comparator<? super K> cmp = m.comparator;
             for (ConcurrentSkipListMap.Node<K,V> n = loNode(cmp);
@@ -2766,20 +2817,24 @@ public void clear(@Shrinkable SubMap<K,V> this) {
 
         /* ----------------  ConcurrentMap API methods -------------- */
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V putIfAbsent(@Growable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.putIfAbsent(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Shrinkable SubMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value) {
             return inBounds(key, m.comparator) && m.remove(key, value);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean replace(@Replaceable SubMap<K,V> this, K key, V oldValue, V newValue) {
             checkKeyBounds(key, m.comparator);
             return m.replace(key, oldValue, newValue);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public V replace(@Replaceable SubMap<K,V> this, K key, V value) {
             checkKeyBounds(key, m.comparator);
             return m.replace(key, value);
@@ -2787,6 +2842,7 @@ public V replace(@Replaceable SubMap<K,V> this, K key, V value) {
 
         /* ----------------  SortedMap API methods -------------- */
 
+        @Pure
         public Comparator<? super K> comparator() {
             Comparator<? super K> cmp = m.comparator();
             if (isDescending)
@@ -2881,58 +2937,72 @@ SubMap<K,V> newSubMap(K fromKey, boolean fromInclusive,
 
         /* ----------------  Relational methods -------------- */
 
+        @Pure
         public Map.Entry<K,V> ceilingEntry(K key) {
             return getNearEntry(key, GT|EQ);
         }
 
+        @Pure
         public K ceilingKey(K key) {
             return getNearKey(key, GT|EQ);
         }
 
+        @Pure
         public Map.Entry<K,V> lowerEntry(K key) {
             return getNearEntry(key, LT);
         }
 
+        @Pure
         public K lowerKey(K key) {
             return getNearKey(key, LT);
         }
 
+        @Pure
         public Map.Entry<K,V> floorEntry(K key) {
             return getNearEntry(key, LT|EQ);
         }
 
+        @Pure
         public K floorKey(K key) {
             return getNearKey(key, LT|EQ);
         }
 
+        @Pure
         public Map.Entry<K,V> higherEntry(K key) {
             return getNearEntry(key, GT);
         }
 
+        @Pure
         public K higherKey(K key) {
             return getNearKey(key, GT);
         }
 
+        @Pure
         public K firstKey() {
             return isDescending ? highestKey() : lowestKey();
         }
 
+        @Pure
         public K lastKey() {
             return isDescending ? lowestKey() : highestKey();
         }
 
+        @Pure
         public Map.Entry<K,V> firstEntry() {
             return isDescending ? highestEntry() : lowestEntry();
         }
 
+        @Pure
         public Map.Entry<K,V> lastEntry() {
             return isDescending ? lowestEntry() : highestEntry();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public Map.Entry<K,V> pollFirstEntry(@Shrinkable SubMap<K,V> this) {
             return isDescending ? removeHighest() : removeLowest();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
             return isDescending ? removeLowest() : removeHighest();
         }
@@ -3050,6 +3120,7 @@ private void descend() {
                 }
             }
 
+            @DoesNotUnrefineReceiver("modifiability")
             public void remove() {
                 Node<K,V> l = lastReturned;
                 if (l == null)
@@ -3122,6 +3193,7 @@ public int characteristics() {
 
     // default Map method overrides
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void forEach(BiConsumer<? super K, ? super V> action) {
         if (action == null) throw new NullPointerException();
         Node<K,V> b, n; V v;
@@ -3134,6 +3206,7 @@ public void forEach(BiConsumer<? super K, ? super V> action) {
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable ConcurrentSkipListMap<K,V> this, BiFunction<? super K, ? super V, ? extends V> function) {
         if (function == null) throw new NullPointerException();
         Node<K,V> b, n; V v;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 6c7b5d3eb1f5..a458a08cdcd2 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -50,6 +50,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -266,6 +267,7 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable ConcurrentSkipListSet<E> this, E e) {
         return m.putIfAbsent(e, Boolean.TRUE) == null;
     }
@@ -284,6 +286,7 @@ public boolean add(@Growable ConcurrentSkipListSet<E> this, E e) {
      *         with the elements currently in this set
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable ConcurrentSkipListSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         return m.remove(o, Boolean.TRUE);
     }
@@ -291,6 +294,7 @@ public boolean remove(@Shrinkable ConcurrentSkipListSet<E> this, @GuardSatisfied
     /**
      * Removes all of the elements from this set.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {
         m.clear();
     }
@@ -301,7 +305,7 @@ public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {
      * @return an iterator over the elements in this set in ascending order
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return m.navigableKeySet().iterator();
     }
 
@@ -310,7 +314,7 @@ public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {
      *
      * @return an iterator over the elements in this set in descending order
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return m.descendingKeySet().iterator();
     }
 
@@ -359,6 +363,7 @@ public boolean equals(@Nullable Object o) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable ConcurrentSkipListSet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         // Override AbstractSet version to avoid unnecessary call to size()
         boolean modified = false;
@@ -374,6 +379,7 @@ public boolean removeAll(@Shrinkable ConcurrentSkipListSet<E> this, Collection<?
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified element is null
      */
+    @Pure
     public E lower(E e) {
         return m.lowerKey(e);
     }
@@ -382,6 +388,7 @@ public E lower(E e) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified element is null
      */
+    @Pure
     public E floor(E e) {
         return m.floorKey(e);
     }
@@ -390,6 +397,7 @@ public E floor(E e) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified element is null
      */
+    @Pure
     public E ceiling(E e) {
         return m.ceilingKey(e);
     }
@@ -398,15 +406,18 @@ public E ceiling(E e) {
      * @throws ClassCastException {@inheritDoc}
      * @throws NullPointerException if the specified element is null
      */
+    @Pure
     public E higher(E e) {
         return m.higherKey(e);
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable ConcurrentSkipListSet<E> this) {
         Map.Entry<E,Object> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable ConcurrentSkipListSet<E> this) {
         Map.Entry<E,Object> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
@@ -423,6 +434,7 @@ public E higher(E e) {
     /**
      * @throws java.util.NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E first(@NonEmpty ConcurrentSkipListSet<E> this) {
         return m.firstKey();
     }
@@ -430,6 +442,7 @@ public E first(@NonEmpty ConcurrentSkipListSet<E> this) {
     /**
      * @throws java.util.NoSuchElementException {@inheritDoc}
      */
+    @Pure
     public E last(@NonEmpty ConcurrentSkipListSet<E> this) {
         return m.lastKey();
     }
@@ -466,7 +479,7 @@ public void addLast(E e) {
      *         {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement,
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> subSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement,
                                   boolean fromInclusive,
                                   E toElement,
                                   boolean toInclusive) {
@@ -480,7 +493,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement, boolean inclusive) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> headSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement, boolean inclusive) {
         return new ConcurrentSkipListSet<E>(m.headMap(toElement, inclusive));
     }
 
@@ -489,7 +502,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code fromElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, boolean inclusive) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> tailSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, boolean inclusive) {
         return new ConcurrentSkipListSet<E>(m.tailMap(fromElement, inclusive));
     }
 
@@ -499,7 +512,7 @@ public void addLast(E e) {
      *         {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> subSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, E toElement) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> subSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement, E toElement) {
         return subSet(fromElement, true, toElement, false);
     }
 
@@ -508,7 +521,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code toElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> headSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> headSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E toElement) {
         return headSet(toElement, false);
     }
 
@@ -517,7 +530,7 @@ public void addLast(E e) {
      * @throws NullPointerException if {@code fromElement} is null
      * @throws IllegalArgumentException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> tailSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> tailSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this, E fromElement) {
         return tailSet(fromElement, true);
     }
 
@@ -533,7 +546,7 @@ public void addLast(E e) {
      *
      * @return a reverse order view of this set
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty NavigableSet<E> descendingSet(@PolyModifiable @PolyGrowShrink @PolyNonEmpty ConcurrentSkipListSet<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> descendingSet(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ConcurrentSkipListSet<E> this) {
         return new ConcurrentSkipListSet<E>(m.descendingMap());
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index 0ea4fa62040d..ac683901d348 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -53,6 +53,8 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -268,6 +270,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
     /**
      * {@inheritDoc}
      */
+    @Pure
+    @StaticallyExecutable
     public int indexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
         Object[] es = getArray();
         return indexOfRange(o, es, 0, es.length);
@@ -288,6 +292,8 @@ public int indexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      *         {@code -1} if the element is not found.
      * @throws IndexOutOfBoundsException if the specified index is negative
      */
+    @Pure
+    @StaticallyExecutable
     public int indexOf(E e, int index) {
         Object[] es = getArray();
         return indexOfRange(e, es, index, es.length);
@@ -296,6 +302,8 @@ public int indexOf(E e, int index) {
     /**
      * {@inheritDoc}
      */
+    @Pure
+    @StaticallyExecutable
     public int lastIndexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
         Object[] es = getArray();
         return lastIndexOfRange(o, es, 0, es.length);
@@ -317,6 +325,8 @@ public int lastIndexOf(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @throws IndexOutOfBoundsException if the specified index is greater
      *         than or equal to the current size of this list
      */
+    @Pure
+    @StaticallyExecutable
     public int lastIndexOf(E e, int index) {
         Object[] es = getArray();
         return lastIndexOfRange(e, es, 0, index + 1);
@@ -357,6 +367,7 @@ public int lastIndexOf(E e, int index) {
      *
      * @return an array containing all the elements in this list
      */
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(CopyOnWriteArrayList<@PolyNull @PolySigned E> this) {
         return getArray().clone();
     }
@@ -429,6 +440,7 @@ static String outOfBounds(int index, int size) {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @Pure
     public E get(int index) {
         return elementAt(getArray(), index);
     }
@@ -439,6 +451,7 @@ public E get(int index) {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getFirst() {
         Object[] es = getArray();
         if (es.length == 0)
@@ -453,6 +466,7 @@ public E getFirst() {
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @Pure
     public E getLast() {
         Object[] es = getArray();
         if (es.length == 0)
@@ -467,6 +481,7 @@ public E getLast() {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
         synchronized (lock) {
             Object[] es = getArray();
@@ -489,6 +504,7 @@ public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
      * @return {@code true} (as specified by {@link Collection#add})
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {
         synchronized (lock) {
             Object[] es = getArray();
@@ -507,6 +523,7 @@ public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
         synchronized (lock) {
             Object[] es = getArray();
@@ -533,6 +550,7 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
         add(0, e);
     }
@@ -542,6 +560,7 @@ public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
      *
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
         synchronized (lock) {
             add(getArray().length, e);
@@ -555,6 +574,7 @@ public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {
         synchronized (lock) {
             Object[] es = getArray();
@@ -581,6 +601,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> t
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             if (getArray().length == 0)
@@ -596,6 +617,7 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrit
      * @throws NoSuchElementException {@inheritDoc}
      * @since 21
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             int size = getArray().length;
@@ -618,6 +640,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrite
      * @param o element to be removed from this list, if present
      * @return {@code true} if this list contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         Object[] snapshot = getArray();
         int index = indexOfRange(o, snapshot, 0, snapshot.length);
@@ -698,6 +721,7 @@ void removeRange(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int fr
      * @param e element to be added to this list, if absent
      * @return {@code true} if the element was added
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {
         Object[] snapshot = getArray();
         return indexOfRange(e, snapshot, 0, snapshot.length) < 0
@@ -766,6 +790,7 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      *         or if the specified collection is null
      * @see #remove(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -787,6 +812,7 @@ public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Co
      *         or if the specified collection is null
      * @see #remove(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
@@ -803,6 +829,7 @@ public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArray
      * @throws NullPointerException if the specified collection is null
      * @see #addIfAbsent(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
         Object[] cs = c.toArray();
         if (c.getClass() != ArrayList.class) {
@@ -834,6 +861,7 @@ public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? ext
      * Removes all of the elements from this list.
      * The list will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
         synchronized (lock) {
             setArray(new Object[0]);
@@ -850,6 +878,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E>
      * @throws NullPointerException if the specified collection is null
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
         Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
             ((CopyOnWriteArrayList<?>)c).getArray() : c.toArray();
@@ -887,6 +916,7 @@ public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? exten
      * @throws NullPointerException if the specified collection is null
      * @see #add(int,Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {
         Object[] cs = c.toArray();
         synchronized (lock) {
@@ -927,6 +957,7 @@ public void forEach(Consumer<? super E> action) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -984,6 +1015,7 @@ boolean bulkRemove(Predicate<? super E> filter, int i, int end) {
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void replaceAll(@Replaceable CopyOnWriteArrayList<E> this, UnaryOperator<E> operator) {
         synchronized (lock) {
             replaceAllRange(operator, 0, getArray().length);
@@ -999,6 +1031,7 @@ void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
         setArray(es);
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {
         synchronized (lock) {
             sortRange(c, 0, getArray().length);
@@ -1245,6 +1278,7 @@ public int previousIndex() {
          * @throws UnsupportedOperationException always; {@code remove}
          *         is not supported by this iterator.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             throw new UnsupportedOperationException();
         }
@@ -1254,6 +1288,7 @@ public void remove() {
          * @throws UnsupportedOperationException always; {@code set}
          *         is not supported by this iterator.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public void set(E e) {
             throw new UnsupportedOperationException();
         }
@@ -1263,6 +1298,7 @@ public void set(E e) {
          * @throws UnsupportedOperationException always; {@code add}
          *         is not supported by this iterator.
          */
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(E e) {
             throw new UnsupportedOperationException();
         }
@@ -1293,7 +1329,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      * @return a view of the specified range within this list
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyModifiable @PolyGrowShrink List<E> subList(@PolyModifiable @PolyGrowShrink CopyOnWriteArrayList<E> this, int fromIndex, int toIndex) {
+    public @PolyGrowShrink @PolyModifiable List<E> subList(@PolyGrowShrink @PolyModifiable CopyOnWriteArrayList<E> this, int fromIndex, int toIndex) {
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -1345,6 +1381,7 @@ private void rangeCheckForAdd(int index) {
                 throw new IndexOutOfBoundsException(outOfBounds(index, size));
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             final Object[] es;
             final int offset;
@@ -1378,6 +1415,8 @@ public Object[] toArray() {
             }
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             final Object[] es;
             final int offset;
@@ -1391,6 +1430,8 @@ public int indexOf(Object o) {
             return (i == -1) ? -1 : i - offset;
         }
 
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             final Object[] es;
             final int offset;
@@ -1428,6 +1469,7 @@ public boolean containsAll(Collection<? extends @NonNull @UnknownSignedness Obje
 
         @Pure
         @EnsuresNonEmptyIf(result = false, expression = "this")
+        @Pure
         public boolean isEmpty() {
             return size() == 0;
         }
@@ -1436,6 +1478,7 @@ public String toString() {
             return Arrays.toString(toArray());
         }
 
+        @Pure
         public int hashCode() {
             final Object[] es;
             final int offset;
@@ -1448,6 +1491,7 @@ public int hashCode() {
             return hashCodeOfRange(es, offset, offset + size);
         }
 
+        @Pure
         public boolean equals(Object o) {
             if (o == this)
                 return true;
@@ -1470,6 +1514,7 @@ public boolean equals(Object o) {
             return !it.hasNext();
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E set(int index, E element) {
             synchronized (lock) {
                 rangeCheck(index);
@@ -1480,6 +1525,7 @@ public E set(int index, E element) {
             }
         }
 
+        @Pure
         public E get(int index) {
             synchronized (lock) {
                 rangeCheck(index);
@@ -1498,6 +1544,7 @@ public E getFirst() {
             }
         }
 
+        @Pure
         public E getLast() {
             synchronized (lock) {
                 if (size == 0)
@@ -1507,6 +1554,7 @@ public E getLast() {
             }
         }
 
+        @Pure
         public int size() {
             synchronized (lock) {
                 checkForComodification();
@@ -1515,6 +1563,7 @@ public int size() {
         }
 
         @EnsuresNonEmpty("this")
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(E element) {
             synchronized (lock) {
                 checkForComodification();
@@ -1525,6 +1574,7 @@ public boolean add(E element) {
             return true;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(int index, E element) {
             synchronized (lock) {
                 checkForComodification();
@@ -1535,16 +1585,19 @@ public void add(int index, E element) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addFirst(E e) {
             add(0, e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addLast(E e) {
             synchronized (lock) {
                 add(size, e);
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends E> c) {
             synchronized (lock) {
                 final Object[] oldArray = getArrayChecked();
@@ -1555,6 +1608,7 @@ public boolean addAll(Collection<? extends E> c) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(int index, Collection<? extends E> c) {
             synchronized (lock) {
                 rangeCheckForAdd(index);
@@ -1566,6 +1620,7 @@ public boolean addAll(int index, Collection<? extends E> c) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             synchronized (lock) {
                 checkForComodification();
@@ -1575,6 +1630,7 @@ public void clear() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove(int index) {
             synchronized (lock) {
                 rangeCheck(index);
@@ -1586,6 +1642,7 @@ public E remove(int index) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeFirst() {
             synchronized (lock) {
                 if (size == 0)
@@ -1595,6 +1652,7 @@ public E removeFirst() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeLast() {
             synchronized (lock) {
                 if (size == 0)
@@ -1604,6 +1662,7 @@ public E removeLast() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(@Nullable @UnknownSignedness Object o) {
             synchronized (lock) {
                 checkForComodification();
@@ -1653,6 +1712,7 @@ public void forEach(Consumer<? super E> action) {
                 action.accept(elementAt(es, i));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(UnaryOperator<E> operator) {
             synchronized (lock) {
                 checkForComodification();
@@ -1661,6 +1721,7 @@ public void replaceAll(UnaryOperator<E> operator) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void sort(Comparator<? super E> c) {
             synchronized (lock) {
                 checkForComodification();
@@ -1669,16 +1730,19 @@ public void sort(Comparator<? super E> c) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
             Objects.requireNonNull(c);
             return bulkRemove(e -> c.contains(e));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<? extends @NonNull @UnknownSignedness Object> c) {
             Objects.requireNonNull(c);
             return bulkRemove(e -> !c.contains(e));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) {
             Objects.requireNonNull(filter);
             return bulkRemove(filter);
@@ -1732,6 +1796,7 @@ public E next(@NonEmpty COWSubListIterator<E> this) {
                 throw new NoSuchElementException();
         }
 
+        @Pure
         public boolean hasPrevious() {
             return previousIndex() >= 0;
         }
@@ -1783,7 +1848,7 @@ public void forEachRemaining(Consumer<? super E> action) {
      *
      * @since 21
      */
-    public @PolyModifiable @PolyGrowShrink List<E> reversed(@PolyModifiable @PolyGrowShrink CopyOnWriteArrayList<E> this) {
+    public @PolyGrowShrink @PolyModifiable List<E> reversed(@PolyGrowShrink @PolyModifiable CopyOnWriteArrayList<E> this) {
         return new Reversed<>(this, lock);
     }
 
@@ -1808,6 +1873,7 @@ class DescendingIterator implements Iterator<E> {
             }
             public boolean hasNext() { return it.hasPrevious(); }
             public E next() { return it.previous(); }
+            @DoesNotUnrefineReceiver("modifiability")
             public void remove() { it.remove(); }
         }
 
@@ -1832,6 +1898,7 @@ public E next() {
                 return it.previous();
             }
 
+            @Pure
             public boolean hasPrevious() {
                 return it.hasNext();
             }
@@ -1879,11 +1946,13 @@ public Spliterator<E> spliterator() {
 
         // ========== Collection ==========
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean add(E e) {
             base.add(0, e);
             return true;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(Collection<? extends E> c) {
             @SuppressWarnings("unchecked")
             E[] es = (E[]) c.toArray();
@@ -1896,19 +1965,23 @@ public boolean addAll(Collection<? extends E> c) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void clear() {
             base.clear();
         }
 
+        @Pure
         public boolean contains(Object o) {
             return base.contains(o);
         }
 
+        @Pure
         public boolean containsAll(Collection<?> c) {
             return base.containsAll(c);
         }
 
         // copied from AbstractList
+        @Pure
         public boolean equals(Object o) {
             if (o == this)
                 return true;
@@ -1927,6 +2000,7 @@ public boolean equals(Object o) {
         }
 
         // copied from AbstractList
+        @Pure
         public int hashCode() {
             int hashCode = 1;
             for (E e : this)
@@ -1934,6 +2008,7 @@ public int hashCode() {
             return hashCode;
         }
 
+        @Pure
         public boolean isEmpty() {
             return base.isEmpty();
         }
@@ -1942,6 +2017,7 @@ public Stream<E> parallelStream() {
             return StreamSupport.stream(spliterator(), true);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean remove(Object o) {
             synchronized (lock) {
                 int index = indexOf(o);
@@ -1952,14 +2028,17 @@ public boolean remove(Object o) {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeAll(Collection<?> c) {
             return base.removeAll(c);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean retainAll(Collection<?> c) {
             return base.retainAll(c);
         }
 
+        @Pure
         public int size() {
             return base.size();
         }
@@ -1968,6 +2047,7 @@ public Stream<E> stream() {
             return StreamSupport.stream(spliterator(), false);
         }
 
+        @SideEffectFree
         public Object[] toArray() {
             return ArraysSupport.reverse(base.toArray());
         }
@@ -1978,6 +2058,7 @@ public <T> T[] toArray(T[] a) {
             return toArray(i -> (T[]) java.lang.reflect.Array.newInstance(a.getClass().getComponentType(), i));
         }
 
+        @SideEffectFree
         public <T> T[] toArray(IntFunction<T[]> generator) {
             return ArraysSupport.reverse(base.toArray(generator));
         }
@@ -2001,20 +2082,24 @@ public String toString() {
 
         // ========== List ==========
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void add(int index, E element) {
             synchronized (lock) {
                 base.add(base.size() - index, element);
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addFirst(E e) {
             base.add(e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void addLast(E e) {
             base.add(0, e);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean addAll(int index, Collection<? extends E> c) {
             @SuppressWarnings("unchecked")
             E[] es = (E[]) c.toArray();
@@ -2029,12 +2114,14 @@ public boolean addAll(int index, Collection<? extends E> c) {
             }
         }
 
+        @Pure
         public E get(int i) {
             synchronized (lock) {
                 return base.get(base.size() - i - 1);
             }
         }
 
+        @Pure
         public E getFirst() {
             synchronized (lock) {
                 int size = base.size();
@@ -2045,6 +2132,7 @@ public E getFirst() {
             }
         }
 
+        @Pure
         public E getLast() {
             synchronized (lock) {
                 if (base.size() == 0)
@@ -2054,6 +2142,8 @@ public E getLast() {
             }
         }
 
+        @Pure
+        @StaticallyExecutable
         public int indexOf(Object o) {
             synchronized (lock) {
                 int i = base.lastIndexOf(o);
@@ -2061,6 +2151,8 @@ public int indexOf(Object o) {
             }
         }
 
+        @Pure
+        @StaticallyExecutable
         public int lastIndexOf(Object o) {
             synchronized (lock) {
                 int i = base.indexOf(o);
@@ -2076,12 +2168,14 @@ public ListIterator<E> listIterator(int index) {
             return new DescendingListIterator(index);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E remove(int index) {
             synchronized (lock) {
                 return base.remove(base.size() - index - 1);
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeFirst() {
             synchronized (lock) {
                 int size = base.size();
@@ -2092,6 +2186,7 @@ public E removeFirst() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E removeLast() {
             synchronized (lock) {
                 if (base.size() == 0)
@@ -2101,18 +2196,22 @@ public E removeLast() {
             }
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public boolean removeIf(Predicate<? super E> filter) {
             return base.removeIf(filter);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void replaceAll(UnaryOperator<E> operator) {
             base.replaceAll(operator);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void sort(Comparator<? super E> c) {
             base.sort(Collections.reverseOrder(c));
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public E set(int index, E element) {
             synchronized (lock) {
                 return base.set(base.size() - index - 1, element);
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
index f2a816bad2c0..84c58335c031 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
@@ -51,6 +51,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -199,6 +200,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      *
      * @return an array containing all the elements in this set
      */
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(CopyOnWriteArraySet<@PolyNull @PolySigned E> this) {
         return al.toArray();
     }
@@ -252,6 +254,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * Removes all of the elements from this set.
      * The set will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable CopyOnWriteArraySet<E> this) {
         al.clear();
     }
@@ -267,6 +270,7 @@ public void clear(@Shrinkable CopyOnWriteArraySet<E> this) {
      * @param o object to be removed from this set, if present
      * @return {@code true} if this set contained the specified element
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable CopyOnWriteArraySet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return al.remove(o);
     }
@@ -284,6 +288,7 @@ public boolean remove(@Shrinkable CopyOnWriteArraySet<E> this, @GuardSatisfied @
      *         element
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable CopyOnWriteArraySet<E> this, E e) {
         return al.addIfAbsent(e);
     }
@@ -354,6 +359,7 @@ private static int compareSets(Object[] snapshot, Set<?> set) {
      * @throws NullPointerException if the specified collection is null
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable CopyOnWriteArraySet<E> this, Collection<? extends E> c) {
         return al.addAllAbsent(c) > 0;
     }
@@ -375,6 +381,7 @@ public boolean addAll(@Growable CopyOnWriteArraySet<E> this, Collection<? extend
      *         or if the specified collection is null
      * @see #remove(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         return al.removeAll(c);
     }
@@ -398,6 +405,7 @@ public boolean removeAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? e
      *         or if the specified collection is null
      * @see #remove(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         return al.retainAll(c);
     }
@@ -444,6 +452,7 @@ public boolean equals(@Nullable Object o) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable CopyOnWriteArraySet<E> this, Predicate<? super E> filter) {
         return al.removeIf(filter);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 485450ec1dee..6369edd3dc28 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -47,6 +47,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
@@ -174,6 +175,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable DelayQueue<E> this, E e) {
         return offer(e);
     }
@@ -185,6 +187,7 @@ public boolean add(@Growable DelayQueue<E> this, E e) {
      * @return {@code true}
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable DelayQueue<E> this, E e) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -207,6 +210,7 @@ public boolean offer(@Growable DelayQueue<E> this, E e) {
      * @param e the element to add
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable DelayQueue<E> this, E e) {
         offer(e);
     }
@@ -221,6 +225,7 @@ public void put(@Growable DelayQueue<E> this, E e) {
      * @return {@code true}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit unit) {
         return offer(e);
     }
@@ -233,6 +238,7 @@ public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit u
      * @return the <em>expired head</em> of this queue, or {@code null} if this
      *         queue has no elements with an expired delay
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -254,6 +260,7 @@ public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit u
      * @return the <em>expired head</em> of this queue
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -299,6 +306,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws
      *         an expired delay becomes available
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
@@ -349,6 +357,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws
      * @throws NoSuchElementException if this queue has no elements with an
      *         expired delay
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable DelayQueue<E> this) {
         return super.remove();
     }
@@ -390,6 +399,7 @@ public int size() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
@@ -400,6 +410,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @G
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -430,6 +441,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @G
      * Elements with an unexpired delay are not waited for; they are
      * simply discarded from the queue.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -509,7 +521,6 @@ public int remainingCapacity() {
      *         this queue
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -524,6 +535,7 @@ public int remainingCapacity() {
      * Removes a single instance of the specified element from this
      * queue, if it is present, whether or not it has expired.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink DelayQueue<E> this, @UnknownSignedness Object o) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -563,7 +575,7 @@ void removeEQ(Object o) {
      * @return an iterator over the elements in this queue
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty DelayQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty DelayQueue<E> this) {
         return new Itr(toArray());
     }
 
@@ -594,6 +606,7 @@ public E next(@NonEmpty Itr this) {
             return (E)array[lastRet = cursor++];
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastRet < 0)
                 throw new IllegalStateException();
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index cd6a48a92b7a..2e4550f519d6 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -51,7 +51,9 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
@@ -335,6 +337,7 @@ void unlink(@CanShrink LinkedBlockingDeque<E> this, Node<E> x) {
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
         if (!offerFirst(e))
             throw new IllegalStateException("Deque full");
@@ -344,6 +347,7 @@ public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException  {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
         if (!offerLast(e))
             throw new IllegalStateException("Deque full");
@@ -352,6 +356,7 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -367,6 +372,7 @@ public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -383,6 +389,7 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -400,6 +407,7 @@ public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws Interrup
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
@@ -417,6 +425,7 @@ public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws Interrupt
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
@@ -440,6 +449,7 @@ public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e, long timeo
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
@@ -462,6 +472,7 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         E x = pollFirst();
         if (x == null) throw new NoSuchElementException();
@@ -471,12 +482,14 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBloc
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         E x = pollLast();
         if (x == null) throw new NoSuchElementException();
         return x;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -487,6 +500,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlock
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -497,6 +511,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlock
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E takeFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -510,6 +525,7 @@ public E takeFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -523,6 +539,7 @@ public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException {
         long nanos = unit.toNanos(timeout);
@@ -541,6 +558,7 @@ public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit)
         throws InterruptedException {
         long nanos = unit.toNanos(timeout);
@@ -599,6 +617,7 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeFirstOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
@@ -616,6 +635,7 @@ public boolean removeFirstOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeLastOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
         if (o == null) return false;
         final ReentrantLock lock = this.lock;
@@ -646,6 +666,7 @@ public boolean removeLastOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable LinkedBlockingDeque<E> this, E e) {
         addLast(e);
         return true;
@@ -654,6 +675,7 @@ public boolean add(@Growable LinkedBlockingDeque<E> this, E e) {
     /**
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedBlockingDeque<E> this, E e) {
         return offerLast(e);
     }
@@ -662,6 +684,7 @@ public boolean offer(@Growable LinkedBlockingDeque<E> this, E e) {
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         putLast(e);
     }
@@ -670,6 +693,7 @@ public void put(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedEx
      * @throws NullPointerException {@inheritDoc}
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         return offerLast(e, timeout, unit);
@@ -685,18 +709,22 @@ public boolean offer(@Growable LinkedBlockingDeque<E> this, E e, long timeout, T
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         return removeFirst();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         return pollFirst();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
         return takeFirst();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         return pollFirst(timeout, unit);
     }
@@ -711,6 +739,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this
      * @return the head of the queue represented by this deque
      * @throws NoSuchElementException if this deque is empty
      */
+    @SideEffectFree
     public E element(@NonEmpty LinkedBlockingDeque<E> this) {
         return getFirst();
     }
@@ -747,6 +776,7 @@ public int remainingCapacity() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
@@ -757,6 +787,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -783,6 +814,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
      * @throws IllegalStateException if this deque is full
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void push(@Growable LinkedBlockingDeque<E> this, E e) {
         addFirst(e);
     }
@@ -790,6 +822,7 @@ public void push(@Growable LinkedBlockingDeque<E> this, E e) {
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
         return removeFirst();
     }
@@ -810,6 +843,7 @@ public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDequ
      * @param o element to be removed from this deque, if present
      * @return {@code true} if this deque changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return removeFirstOccurrence(o);
     }
@@ -868,6 +902,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @throws IllegalStateException if this deque is full
      * @see #add(Object)
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean addAll(@Growable LinkedBlockingDeque<E> this, Collection<? extends E> c) {
         if (c == this)
             // As historically specified in AbstractQueue#addAll
@@ -928,6 +963,7 @@ public boolean addAll(@Growable LinkedBlockingDeque<E> this, Collection<? extend
      * @return an array containing all of the elements in this deque
      */
     @SuppressWarnings("unchecked")
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(LinkedBlockingDeque<@PolyNull @PolySigned E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -1005,6 +1041,7 @@ public String toString() {
      * Atomically removes all of the elements from this deque.
      * The deque will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -1045,7 +1082,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this deque in proper sequence
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedBlockingDeque<E> this) {
         return new Itr();
     }
 
@@ -1059,7 +1096,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this deque in reverse order
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> descendingIterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingDeque<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> descendingIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedBlockingDeque<E> this) {
         return new DescendingItr();
     }
 
@@ -1174,6 +1211,7 @@ public void forEachRemaining(Consumer<? super E> action) {
             } while (n > 0 && p != null);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             Node<E> n = lastRet;
             if (n == null)
@@ -1361,6 +1399,7 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1369,6 +1408,7 @@ public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Pred
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1377,6 +1417,7 @@ public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Col
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 9e893c436bda..8bde84325e0a 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -50,7 +50,9 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
@@ -344,6 +346,7 @@ public int remainingCapacity() {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable LinkedBlockingQueue<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         final int c;
@@ -383,6 +386,7 @@ public void put(@Growable LinkedBlockingQueue<E> this, E e) throws InterruptedEx
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
 
@@ -421,6 +425,7 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, T
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedBlockingQueue<E> this, E e) {
         if (e == null) throw new NullPointerException();
         final AtomicInteger count = this.count;
@@ -445,6 +450,7 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e) {
         return true;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws InterruptedException {
         final E x;
         final int c;
@@ -467,6 +473,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this
         return x;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         final E x;
         final int c;
@@ -492,6 +499,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this
         return x;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
         final AtomicInteger count = this.count;
         if (count.get() == 0)
@@ -556,6 +564,7 @@ void unlink(Node<E> p, Node<E> pred) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         fullyLock();
@@ -610,6 +619,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      *
      * @return an array containing all of the elements in this queue
      */
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(LinkedBlockingQueue<@PolyNull @PolySigned E> this) {
         fullyLock();
         try {
@@ -687,6 +697,7 @@ public String toString() {
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
         fullyLock();
         try {
@@ -709,6 +720,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E>
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
@@ -719,6 +731,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E>
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -779,7 +792,7 @@ Node<E> succ(Node<E> p) {
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedBlockingQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedBlockingQueue<E> this) {
         return new Itr();
     }
 
@@ -871,6 +884,7 @@ public void forEachRemaining(Consumer<? super E> action) {
             } while (n > 0 && p != null);
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             Node<E> p = lastRet;
             if (p == null)
@@ -1044,6 +1058,7 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1052,6 +1067,7 @@ public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Pred
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1060,6 +1076,7 @@ public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Col
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 155309aa74a8..9304865e8a33 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -42,7 +42,6 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -52,8 +51,11 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.VarHandle;
@@ -832,6 +834,7 @@ else if (a != null && size <= a.length) {
      *
      * @return an array containing all of the elements in this queue
      */
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(LinkedTransferQueue<@PolyNull @PolySigned E> this) {
         return toArrayInternal(null);
     }
@@ -947,6 +950,7 @@ public void forEachRemaining(Consumer<? super E> action) {
                 lastRet = q;
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public final void remove() {
             final Node lastRet = this.lastRet;
             if (lastRet == null)
@@ -1208,6 +1212,7 @@ else if (s == n)    // stale
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
     }
@@ -1221,6 +1226,7 @@ public void put(@Growable LinkedTransferQueue<E> this, E e) {
      *  {@link BlockingQueue#offer(Object,long,TimeUnit) BlockingQueue.offer})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit) {
         xfer(e, true, ASYNC, 0L);
         return true;
@@ -1233,6 +1239,7 @@ public boolean offer(@Growable LinkedTransferQueue<E> this, E e, long timeout, T
      * @return {@code true} (as specified by {@link Queue#offer})
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
         return true;
@@ -1247,6 +1254,7 @@ public boolean offer(@Growable LinkedTransferQueue<E> this, E e) {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable LinkedTransferQueue<E> this, E e) {
         xfer(e, true, ASYNC, 0L);
         return true;
@@ -1262,6 +1270,7 @@ public boolean add(@Growable LinkedTransferQueue<E> this, E e) {
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {
         return xfer(e, true, NOW, 0L) == null;
     }
@@ -1277,6 +1286,7 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
         if (xfer(e, true, SYNC, 0L) != null) {
             Thread.interrupted(); // failure possible only due to interrupt
@@ -1298,6 +1308,7 @@ public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E>
      *
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (xfer(e, true, TIMED, unit.toNanos(timeout)) == null)
@@ -1307,6 +1318,7 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
         throw new InterruptedException();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
         E e = xfer(null, false, SYNC, 0L);
         if (e != null)
@@ -1315,6 +1327,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
         throw new InterruptedException();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = xfer(null, false, TIMED, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
@@ -1322,6 +1335,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
         throw new InterruptedException();
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
         return xfer(null, false, NOW, 0L);
     }
@@ -1330,6 +1344,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -1344,6 +1359,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E>
      * @throws NullPointerException     {@inheritDoc}
      * @throws IllegalArgumentException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -1363,7 +1379,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E>
      *
      * @return an iterator over the elements in this queue in proper sequence
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty LinkedTransferQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty LinkedTransferQueue<E> this) {
         return new Itr();
     }
 
@@ -1447,6 +1463,7 @@ public int getWaitingConsumerCount() {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink LinkedTransferQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         if (o == null) return false;
         restartFromHead: for (;;) {
@@ -1567,6 +1584,7 @@ private void readObject(java.io.ObjectInputStream s)
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1575,6 +1593,7 @@ public boolean removeIf(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Pred
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1583,11 +1602,13 @@ public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Col
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
         bulkRemove(e -> true);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index e222ab85608a..d5a76c5bec0b 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -51,7 +51,9 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
@@ -467,6 +469,7 @@ private void heapify() {
      * @throws NullPointerException if the specified element is null
      */
     @EnsuresNonEmpty("this")
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean add(@Growable PriorityBlockingQueue<E> this, E e) {
         return offer(e);
     }
@@ -482,6 +485,7 @@ public boolean add(@Growable PriorityBlockingQueue<E> this, E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
@@ -515,6 +519,7 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable PriorityBlockingQueue<E> this, E e) {
         offer(e); // never need to block
     }
@@ -534,10 +539,12 @@ public void put(@Growable PriorityBlockingQueue<E> this, E e) {
      *         priority queue's ordering
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable PriorityBlockingQueue<E> this, E e, long timeout, TimeUnit unit) {
         return offer(e); // never need to block
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -548,6 +555,7 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e, long timeout,
         }
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws InterruptedException {
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
@@ -561,6 +569,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> th
         return result;
     }
 
+    @DoesNotUnrefineReceiver("modifiability")
     public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
@@ -595,6 +604,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> th
      *         or {@code null} if this queue uses the natural
      *         ordering of its elements
      */
+    @Pure
     public Comparator<? super E> comparator() {
         return comparator;
     }
@@ -666,6 +676,7 @@ private void removeAt(int i) {
      * @param o element to be removed from this queue, if present
      * @return {@code true} if this queue changed as a result of the call
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, @Nullable @UnknownSignedness Object o) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -731,6 +742,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {
         return drainTo(c, Integer.MAX_VALUE);
     }
@@ -741,6 +753,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -765,6 +778,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<
      * Atomically removes all of the elements from this queue.
      * The queue will be empty after this call returns.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -791,6 +805,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E
      *
      * @return an array containing all of the elements in this queue
      */
+    @SideEffectFree
     public @PolyNull @PolySigned Object[] toArray(PriorityBlockingQueue<@PolyNull @PolySigned E> this) {
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -863,7 +878,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E
      *
      * @return an iterator over the elements in this queue
      */
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty PriorityBlockingQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty PriorityBlockingQueue<E> this) {
         return new Itr(toArray());
     }
 
@@ -892,6 +907,7 @@ public E next(@NonEmpty Itr this) {
             return (E)array[lastRet = cursor++];
         }
 
+        @DoesNotUnrefineReceiver("modifiability")
         public void remove() {
             if (lastRet < 0)
                 throw new IllegalStateException();
@@ -1037,6 +1053,7 @@ public Spliterator<E> spliterator() {
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeIf(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         return bulkRemove(filter);
@@ -1045,6 +1062,7 @@ public boolean removeIf(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Pr
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
@@ -1053,6 +1071,7 @@ public boolean removeAll(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, C
     /**
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index fb83b03584e7..3950b648cf02 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -50,6 +50,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -853,6 +854,7 @@ void clean(QNode pred, QNode s) {
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         if (transferer.transfer(e, false, 0) == null) {
@@ -870,6 +872,7 @@ public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedExcep
      * @throws InterruptedException {@inheritDoc}
      * @throws NullPointerException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException {
         if (e == null) throw new NullPointerException();
@@ -889,6 +892,7 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, Time
      *         {@code false}
      * @throws NullPointerException if the specified element is null
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean offer(@Growable SynchronousQueue<E> this, E e) {
         if (e == null) throw new NullPointerException();
         return transferer.transfer(e, true, 0) != null;
@@ -901,6 +905,7 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e) {
      * @return the head of this queue
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {
         E e = transferer.transfer(null, false, 0);
         if (e != null)
@@ -918,6 +923,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) t
      *         specified waiting time elapses before an element is present
      * @throws InterruptedException {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = transferer.transfer(null, true, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
@@ -932,6 +938,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, l
      * @return the head of this queue, or {@code null} if no
      *         element is available
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
         return transferer.transfer(null, true, 0);
     }
@@ -973,6 +980,7 @@ public int remainingCapacity() {
      * Does nothing.
      * A {@code SynchronousQueue} has no internal capacity.
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public void clear(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
     }
 
@@ -996,6 +1004,7 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      * @param o the element to remove
      * @return {@code false}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean remove(@Shrinkable @CanShrink SynchronousQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
         return false;
     }
@@ -1019,6 +1028,7 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      * @param c the collection
      * @return {@code false}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return false;
     }
@@ -1030,6 +1040,7 @@ public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collec
      * @param c the collection
      * @return {@code false}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return false;
     }
@@ -1053,7 +1064,7 @@ public E peek() {
      * @return an empty iterator
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty SynchronousQueue<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty SynchronousQueue<E> this) {
         return Collections.emptyIterator();
     }
 
@@ -1086,7 +1097,6 @@ public Spliterator<E> spliterator() {
      * @return the specified array
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     public <T> @Nullable T[] toArray(@PolyNull T[] a) {
         if (a.length > 0)
             a[0] = null;
@@ -1107,6 +1117,7 @@ public String toString() {
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
@@ -1123,6 +1134,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> th
      * @throws NullPointerException          {@inheritDoc}
      * @throws IllegalArgumentException      {@inheritDoc}
      */
+    @DoesNotUnrefineReceiver("modifiability")
     public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
diff --git a/src/java.base/share/classes/java/util/stream/DoublePipeline.java b/src/java.base/share/classes/java/util/stream/DoublePipeline.java
index 9771440f8aa9..bb4c3d8a8962 100644
--- a/src/java.base/share/classes/java/util/stream/DoublePipeline.java
+++ b/src/java.base/share/classes/java/util/stream/DoublePipeline.java
@@ -567,6 +567,7 @@ public final OptionalDouble findAny() {
     }
 
     @Override
+    @SideEffectFree
     public final double[] toArray() {
         return Nodes.flattenDouble((Node.OfDouble) evaluateToArrayNode(Double[]::new))
                         .asPrimitiveArray();
diff --git a/src/java.base/share/classes/java/util/stream/IntPipeline.java b/src/java.base/share/classes/java/util/stream/IntPipeline.java
index f0d019c7d74a..6b3b31d80846 100644
--- a/src/java.base/share/classes/java/util/stream/IntPipeline.java
+++ b/src/java.base/share/classes/java/util/stream/IntPipeline.java
@@ -558,6 +558,7 @@ public final OptionalInt findAny() {
     }
 
     @Override
+    @SideEffectFree
     public final int[] toArray() {
         return Nodes.flattenInt((Node.OfInt) evaluateToArrayNode(Integer[]::new))
                         .asPrimitiveArray();
diff --git a/src/java.base/share/classes/java/util/stream/LongPipeline.java b/src/java.base/share/classes/java/util/stream/LongPipeline.java
index 227a071100af..ebf3e6a0acaf 100644
--- a/src/java.base/share/classes/java/util/stream/LongPipeline.java
+++ b/src/java.base/share/classes/java/util/stream/LongPipeline.java
@@ -541,6 +541,7 @@ public final OptionalLong findAny() {
     }
 
     @Override
+    @SideEffectFree
     public final long[] toArray() {
         return Nodes.flattenLong((Node.OfLong) evaluateToArrayNode(Long[]::new))
                 .asPrimitiveArray();
diff --git a/src/java.base/share/classes/java/util/stream/Stream.java b/src/java.base/share/classes/java/util/stream/Stream.java
index 7193a7d7e86e..4e592f283465 100644
--- a/src/java.base/share/classes/java/util/stream/Stream.java
+++ b/src/java.base/share/classes/java/util/stream/Stream.java
@@ -922,7 +922,6 @@ default Stream<T> dropWhile(Predicate<? super T> predicate) {
      *         stream is not assignable to the {@linkplain Class#getComponentType
      *         runtime component type} of the generated array
      */
-    @SideEffectFree
     <A> A[] toArray(IntFunction<A[]> generator);
 
     /**
diff --git a/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java b/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
index c4601ef3e6cc..b07f752908c9 100644
--- a/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
+++ b/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
@@ -62,18 +62,22 @@ public int add(final String string) {
         throw new InternalError("Can not add strings at runtime");
     }
 
+    @Pure
     public static int hashCode(String s) {
         return hashCode(s, HASH_MULTIPLIER);
     }
 
+    @Pure
     public static int hashCode(String s, int seed) {
         return unmaskedHashCode(s, seed) & POSITIVE_MASK;
     }
 
+    @Pure
     public static int hashCode(String module, String name) {
         return hashCode(module, name, HASH_MULTIPLIER);
     }
 
+    @Pure
     public static int hashCode(String module, String name, int seed) {
         seed = (seed * HASH_MULTIPLIER) ^ ('/');
         seed = unmaskedHashCode(module, seed);
diff --git a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
index 61be28519fc2..daeb71a58cea 100644
--- a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
+++ b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
@@ -219,6 +219,7 @@ private static int signedHashCode(int result, byte[] a, int fromIndex, int lengt
         return result;
     }
 
+    @Pure
     private static int hashCode(int result, byte[] a, int fromIndex, int length) {
         int end = fromIndex + length;
         for (int i = fromIndex; i < end; i++) {
@@ -227,6 +228,7 @@ private static int hashCode(int result, byte[] a, int fromIndex, int length) {
         return result;
     }
 
+    @Pure
     private static int hashCode(int result, char[] a, int fromIndex, int length) {
         int end = fromIndex + length;
         for (int i = fromIndex; i < end; i++) {
@@ -235,6 +237,7 @@ private static int hashCode(int result, char[] a, int fromIndex, int length) {
         return result;
     }
 
+    @Pure
     private static int hashCode(int result, short[] a, int fromIndex, int length) {
         int end = fromIndex + length;
         for (int i = fromIndex; i < end; i++) {
@@ -243,6 +246,7 @@ private static int hashCode(int result, short[] a, int fromIndex, int length) {
         return result;
     }
 
+    @Pure
     private static int hashCode(int result, int[] a, int fromIndex, int length) {
         int end = fromIndex + length;
         for (int i = fromIndex; i < end; i++) {
diff --git a/src/java.desktop/share/classes/javax/swing/DefaultListModel.java b/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
index 9d519927b677..d75de937e94b 100644
--- a/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
+++ b/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
@@ -268,6 +268,7 @@ public int lastIndexOf(Object elem, int index) {
      * @see #get(int)
      * @see Vector#elementAt(int)
      */
+    @SideEffectFree
     public E elementAt(int index) {
         return delegate.elementAt(index);
     }
diff --git a/test/jdk/java/util/SequencedCollection/SimpleDeque.java b/test/jdk/java/util/SequencedCollection/SimpleDeque.java
index c1ed07210fba..3524ba2c075f 100644
--- a/test/jdk/java/util/SequencedCollection/SimpleDeque.java
+++ b/test/jdk/java/util/SequencedCollection/SimpleDeque.java
@@ -178,6 +178,7 @@ public E poll() {
         return deque.poll();
     }
 
+    @SideEffectFree
     public E element() {
         return deque.element();
     }

From ec30b3eada71c97fd15fb3392d04c15cc6580121 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 12:19:01 -0700
Subject: [PATCH 044/119] Update qualifiers

---
 README.md                                     |  11 +++----
 checker-qual.jar                              | Bin 275625 -> 286009 bytes
 src/java.base/share/classes/module-info.java  |   3 +-
 .../checker/fenum/qual/FenumUnqualified.java  |   3 +-
 .../checker/formatter/qual/Format.java        |   2 +-
 .../checker/index/qual/EnsuresLTLengthOf.java |   2 +-
 .../checker/index/qual/IndexFor.java          |   2 +-
 .../checker/index/qual/IndexOrHigh.java       |   4 +--
 .../checker/index/qual/IndexOrLow.java        |   6 ++--
 .../checker/lock/qual/LockHeld.java           |   3 +-
 .../checker/lock/qual/LockPossiblyHeld.java   |   3 +-
 .../checker/modifiability/qual/Growable.java  |  22 +++++++++++++
 .../modifiability/qual/Modifiable.java        |  22 +++++++++++++
 .../checker/modifiability/qual/PolyGrow.java  |  23 +++++++++++++
 .../modifiability/qual/PolyModifiable.java    |  31 ++++++++++++++++++
 .../modifiability/qual/PolyReplace.java       |  23 +++++++++++++
 .../modifiability/qual/PolyShrink.java        |  22 +++++++++++++
 .../modifiability/qual/Replaceable.java       |  22 +++++++++++++
 .../modifiability/qual/Shrinkable.java        |  22 +++++++++++++
 .../checker/modifiability/qual/ThrowsUOE.java |  18 ++++++++++
 .../modifiability/qual/UnknownGrow.java       |  24 ++++++++++++++
 .../qual/UnknownModifiability.java            |  23 +++++++++++++
 .../modifiability/qual/UnknownReplace.java    |  25 ++++++++++++++
 .../modifiability/qual/UnknownShrink.java     |  25 ++++++++++++++
 .../modifiability/qual/Unmodifiable.java      |  22 +++++++++++++
 .../checker/mustcall/qual/MustCallAlias.java  |   2 --
 .../nonempty/qual/EnsuresNonEmpty.java        |  14 ++++----
 .../nullness/qual/AssertNonNullIfNonNull.java |  10 +++---
 .../nullness/qual/EnsuresNonNullIf.java       |   2 +-
 .../checker/optional/qual/EnsuresPresent.java |  14 ++++----
 .../checker/regex/qual/PartialRegex.java      |   2 +-
 .../checker/regex/qual/RegexBottom.java       |   2 +-
 .../signature/qual/SignatureUnknown.java      |   3 +-
 .../checker/signedness/qual/Signed.java       |  11 ++-----
 .../checker/signedness/qual/Unsigned.java     |   4 +--
 .../checker/units/qual/PolyUnit.java          |  14 ++++----
 .../common/aliasing/qual/MaybeLeaked.java     |   3 +-
 .../common/subtyping/qual/Unqualified.java    |   3 +-
 .../common/value/qual/DoesNotMatchRegex.java  |   2 +-
 .../qual/IntRangeFromGTENegativeOne.java      |   2 +-
 .../value/qual/IntRangeFromNonNegative.java   |   2 +-
 .../value/qual/IntRangeFromPositive.java      |   8 ++---
 .../common/value/qual/MatchesRegex.java       |   2 +-
 .../qual/DoesNotUnrefineReceiver.java         |  31 ++++++++++++++++++
 .../dataflow/qual/SideEffectsOnly.java        |  29 ----------------
 .../framework/qual/CFComment.java             |   4 +--
 .../framework/qual/EnsuresQualifierIf.java    |   8 ++---
 .../qual/PostconditionAnnotation.java         |   6 ++--
 .../qual/PreconditionAnnotation.java          |  20 +++++------
 49 files changed, 442 insertions(+), 119 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java
 delete mode 100644 src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java

diff --git a/README.md b/README.md
index f113339385cd..383fb269c884 100644
--- a/README.md
+++ b/README.md
@@ -133,13 +133,12 @@ cp -p $CHECKERFRAMEWORK/checker-qual/build/libs/checker-qual-*-sources.jar check
 jar tf checker-qual.jar | grep '\.java$' | sed 's/\/[^/]*\.java/;/' | sed 's/\//./g' | sed 's/^/    exports /' | sort -u
 ```
 
-The result of the command will be a list of export lines.
-Replace the existing export lines present in
-`src/java.base/share/classes/module-info.java` with the newly-generated list of
-exports. If no new packages were added, then likely no changes are needed
-in the `module-info.java` file.
+It addition to updating `.java` files, the command will output a list of export
+lines.  Place them in `src/java.base/share/classes/module-info.java`.  If no new
+packages were recently added to the Checker Framework, then likely no changes
+are needed in the `module-info.java` file.
 
-Commit the changes, including the new `checker.jar` file and any new `.java`
+Commit the changes, including the new `checker-qual.jar` file and any new `.java`
 files in a `qual/` directory.  (Both are used, by different parts of the build.)
 
 ## The typetools/jdk21u repository
diff --git a/checker-qual.jar b/checker-qual.jar
index a3039199c5b6c49c06ef953b98eaffa620871571..8c13f44b86d88603313b832898f97b0f711bba7d 100644
GIT binary patch
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diff --git a/src/java.base/share/classes/module-info.java b/src/java.base/share/classes/module-info.java
index 5a4f09b96283..17659d96aa63 100644
--- a/src/java.base/share/classes/module-info.java
+++ b/src/java.base/share/classes/module-info.java
@@ -82,12 +82,13 @@
     exports org.checkerframework.checker.fenum.qual;
     exports org.checkerframework.checker.formatter.qual;
     exports org.checkerframework.checker.guieffect.qual;
-    exports org.checkerframework.checker.i18nformatter.qual;
     exports org.checkerframework.checker.i18n.qual;
+    exports org.checkerframework.checker.i18nformatter.qual;
     exports org.checkerframework.checker.index.qual;
     exports org.checkerframework.checker.initialization.qual;
     exports org.checkerframework.checker.interning.qual;
     exports org.checkerframework.checker.lock.qual;
+    exports org.checkerframework.checker.modifiability.qual;
     exports org.checkerframework.checker.mustcall.qual;
     exports org.checkerframework.checker.nonempty.qual;
     exports org.checkerframework.checker.nullness.qual;
diff --git a/src/java.base/share/classes/org/checkerframework/checker/fenum/qual/FenumUnqualified.java b/src/java.base/share/classes/org/checkerframework/checker/fenum/qual/FenumUnqualified.java
index 4eeaf9692145..d2450144d9fd 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/fenum/qual/FenumUnqualified.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/fenum/qual/FenumUnqualified.java
@@ -1,6 +1,7 @@
 package org.checkerframework.checker.fenum.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -20,7 +21,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-@Target({}) // empty target prevents programmers from writing this in a program
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({FenumTop.class})
 @DefaultQualifierInHierarchy
 @DefaultFor(TypeUseLocation.EXCEPTION_PARAMETER)
diff --git a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/Format.java b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/Format.java
index 878fce1ee227..a5249f25b0c4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/Format.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/Format.java
@@ -19,7 +19,7 @@
  * <pre>
  * {@literal @}Format({GENERAL, INT}) String f = "String '%s' has length %d";
  *
- *  String.format(f, "Example", 7);
+ * String.format(f, "Example", 7);
  * </pre>
  *
  * </blockquote>
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/EnsuresLTLengthOf.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/EnsuresLTLengthOf.java
index 6903a5e9f933..3c8474f49b8d 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/EnsuresLTLengthOf.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/EnsuresLTLengthOf.java
@@ -36,7 +36,7 @@
  *
  * <pre>{@code
  * public void useShiftIndex(@NonNegative int x) {
- *    // :: error: (argument)
+ *    // :: error: [argument]
  *    Arrays.fill(array, end, end + x, null);
  *    shiftIndex(x);
  *    Arrays.fill(array, end, end + x, null);
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexFor.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexFor.java
index 7a8ba2733138..6bf2a80529c4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexFor.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexFor.java
@@ -14,7 +14,7 @@
  * different lengths.
  *
  * <p>The <a
- * href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html#charAt(int)">
+ * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/String.html#charAt(int)">
  * {@code String.charAt(int)}</a> method is declared as
  *
  * <pre>{@code
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
index c1f20a6dc816..d24df9bc7748 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
@@ -11,7 +11,7 @@
  * sequence's length.
  *
  * <p>The <a
- * href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Arrays.html#binarySearch(java.lang.Object%5B%5D,int,int,java.lang.Object)">
+ * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/Arrays.html#binarySearch(java.lang.Object%5B%5D,int,int,java.lang.Object)">
  * {@code Arrays.binarySearch}</a> method is declared as
  *
  * <pre>{@code
@@ -33,6 +33,6 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 public @interface IndexOrHigh {
-  /** Sequences that the annotated expression is a valid index for or is equal to the lengeth of. */
+  /** Sequences that the annotated expression is a valid index for or is equal to the length of. */
   String[] value();
 }
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrLow.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrLow.java
index 04a956d9b5ab..aee1643956a6 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrLow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrLow.java
@@ -10,13 +10,13 @@
  * An integer that is either -1 or is a valid index for each of the given sequences.
  *
  * <p>The <a
- * href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html#indexOf(java.lang.String)">
+ * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/String.html#indexOf(java.lang.String)">
  * {@code String.indexOf(String)}</a> method is declared as
  *
  * <pre><code>
- *   class String {
+ *  class String {
  *    {@literal @}IndexOrLow("this") int indexOf(String str) { ... }
- *   }
+ *  }
  * </code></pre>
  *
  * <p>Writing {@code @IndexOrLow("arr")} is equivalent to writing {@link
diff --git a/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockHeld.java b/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockHeld.java
index d77d8c0842f6..e49a60ccb08a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockHeld.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockHeld.java
@@ -1,6 +1,7 @@
 package org.checkerframework.checker.lock.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -19,7 +20,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-@Target({})
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf(LockPossiblyHeld.class) // This is the bottom type in this hierarchy
 @InvisibleQualifier
 public @interface LockHeld {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockPossiblyHeld.java b/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockPossiblyHeld.java
index 15cbf89c7eb8..7dc177b091b4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockPossiblyHeld.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/lock/qual/LockPossiblyHeld.java
@@ -1,6 +1,7 @@
 package org.checkerframework.checker.lock.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -23,7 +24,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-@Target({})
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @InvisibleQualifier
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
new file mode 100644
index 000000000000..5c2b1b7315c1
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling grow operations such as {@code add}, {@code addAll}, etc. on this collection will not
+ * result in throwing {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about shrink or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownGrow.class)
+public @interface Growable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
new file mode 100644
index 000000000000..97d492135de4
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Convenience alias meaning {@code @Growable @Shrinkable @Replaceable}. Calling grow, shrink, and
+ * replace operations such as {@code add}, {@code remove}, {@code set}, etc. on this collection will
+ * not result in throwing {@link UnsupportedOperationException}.
+ *
+ * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
+ * {@code @Growable @Shrinkable @Replaceable} on each annotated type.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+public @interface Modifiable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
new file mode 100644
index 000000000000..3a4d5b43fbf8
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.PolymorphicQualifier;
+
+/**
+ * A polymorphic qualifier for the Grow hierarchy.
+ *
+ * <p>When used on a method, the Grow capability of the return type matches the Grow capability of
+ * the argument or receiver annotated with {@code @PolyGrow}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@PolymorphicQualifier(UnknownGrow.class)
+public @interface PolyGrow {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
new file mode 100644
index 000000000000..73bc67261eb3
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -0,0 +1,31 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+
+/**
+ * Convenience alias meaning {@code @PolyGrow @PolyShrink @PolyReplace}. A polymorphic qualifier for
+ * all three modifiability hierarchies.
+ *
+ * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
+ * {@code @PolyGrow @PolyShrink @PolyReplace} on each annotated type.
+ *
+ * <p>Use on methods that preserve or transfer modifiability &mdash; for example, {@code
+ * List.subList()}, {@code iterator()}, or {@code stream()}.
+ *
+ * <p>For example:
+ *
+ * <pre><code>
+ * class Example {
+ * &nbsp; @PolyModifiable List&lt;E&gt; subList(@PolyModifiable List&lt;E&gt; this, int from, int to);
+ * }
+ * </code></pre>
+ *
+ * If the receiver is {@code @Unmodifiable}, the return is {@code @Unmodifiable}. If the receiver is
+ * {@code @Modifiable}, the return is {@code @Modifiable}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+public @interface PolyModifiable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
new file mode 100644
index 000000000000..eb6e7ac5af7d
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.PolymorphicQualifier;
+
+/**
+ * A polymorphic qualifier for the Replace hierarchy.
+ *
+ * <p>When used on a method, the Replace capability of the return type matches the Replace
+ * capability of the argument or receiver annotated with {@code @PolyReplace}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@PolymorphicQualifier(UnknownReplace.class)
+public @interface PolyReplace {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
new file mode 100644
index 000000000000..b491d8626f99
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.PolymorphicQualifier;
+
+/**
+ * A polymorphic qualifier for the Shrink hierarchy that preserves the shrink capability.
+ *
+ * <p>Use on methods that preserve shrinkability &mdash; for example, {@code Map.keySet()}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@PolymorphicQualifier(UnknownShrink.class)
+public @interface PolyShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
new file mode 100644
index 000000000000..bc6199b61f62
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling replace operations such as {@code set}, {@code replaceAll}, etc. on this collection will
+ * not result in throwing {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about grow or shrink operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownReplace.class)
+public @interface Replaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
new file mode 100644
index 000000000000..cabe5a275869
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling shrink operations such as {@code remove}, {@code clear}, etc. on this collection will not
+ * result in throwing {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about grow or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownShrink.class)
+public @interface Shrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
new file mode 100644
index 000000000000..3651620510c7
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
@@ -0,0 +1,18 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Indicates that the annotated method always throws {@link UnsupportedOperationException} when
+ * called.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+public @interface ThrowsUOE {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
new file mode 100644
index 000000000000..30f3c460deec
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
@@ -0,0 +1,24 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The top qualifier in the Grow hierarchy. Represents an unknown or absent grow capability. The
+ * checker cannot determine whether the collection supports grow operations such as {@code add}.
+ *
+ * <p>This is the default qualifier for unannotated types in the Grow hierarchy.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({})
+@DefaultQualifierInHierarchy
+public @interface UnknownGrow {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
new file mode 100644
index 000000000000..f653f09d2d03
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Convenience alias meaning {@code @UnknownGrow @UnknownShrink @UnknownReplace}. Represents an
+ * unknown or arbitrary modifiability capability; the checker cannot determine whether the
+ * collection is growable, shrinkable, or replaceable.
+ *
+ * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
+ * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type. It is equivalent to
+ * {@link Unmodifiable}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+public @interface UnknownModifiability {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
new file mode 100644
index 000000000000..a793d64f521f
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
@@ -0,0 +1,25 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The top qualifier in the Replace hierarchy. Represents an unknown or absent replace capability.
+ * The checker cannot determine whether the collection supports replace operations such as {@code
+ * set} or {@code replaceAll}.
+ *
+ * <p>This is the default qualifier for unannotated types in the Replace hierarchy.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({})
+@DefaultQualifierInHierarchy
+public @interface UnknownReplace {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
new file mode 100644
index 000000000000..7f87345b521c
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
@@ -0,0 +1,25 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The top qualifier in the Shrink hierarchy. Represents an unknown or absent shrink capability. The
+ * checker cannot determine whether the collection supports shrink operations such as {@code remove}
+ * or {@code clear}.
+ *
+ * <p>This is the default qualifier for unannotated types in the Shrink hierarchy.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({})
+@DefaultQualifierInHierarchy
+public @interface UnknownShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
new file mode 100644
index 000000000000..f5252ff71572
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Convenience alias meaning {@code @UnknownGrow @UnknownShrink @UnknownReplace}. Calling any
+ * mutating operation on this collection (growing, shrinking, or replacing) will throw {@link
+ * UnsupportedOperationException}.
+ *
+ * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
+ * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+public @interface Unmodifiable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/mustcall/qual/MustCallAlias.java b/src/java.base/share/classes/org/checkerframework/checker/mustcall/qual/MustCallAlias.java
index 731ad6597017..f99eee8d4391 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/mustcall/qual/MustCallAlias.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/mustcall/qual/MustCallAlias.java
@@ -78,7 +78,5 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-// In Java 11, this can be:
-// @Target({ElementType.PARAMETER, ElementType.CONSTRUCTOR, ElementType.METHOD})
 @Target({ElementType.PARAMETER, ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.TYPE_USE})
 public @interface MustCallAlias {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmpty.java b/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmpty.java
index 0b0b0ba748ce..520584f6269f 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmpty.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmpty.java
@@ -18,19 +18,19 @@
  * effect:
  *
  * <pre><code>
- *   {@literal @}EnsuresNonEmpty("ids")
- *   void addId(String id) {
- *     ids.add(id);
- *   }
+ *  {@literal @}EnsuresNonEmpty("ids")
+ *  void addId(String id) {
+ *    ids.add(id);
+ *  }
  * </code></pre>
  *
  * It can also be used for a method that fails if a given value is empty, indicating that the
  * argument is non-empty if the method returns normally:
  *
  * <pre><code>
- *   /** Throws an exception if the argument is empty. *&#47;
- *   {@literal @}EnsuresNonEmpty("#1")
- *   void useTheMap(Map&lt;T, U&gt; arg) { ... }
+ *  /** Throws an exception if the argument is empty. *&#47;
+ *  {@literal @}EnsuresNonEmpty("#1")
+ *  void useTheMap(Map&lt;T, U&gt; arg) { ... }
  * </code></pre>
  *
  * @see NonEmpty
diff --git a/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/AssertNonNullIfNonNull.java b/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/AssertNonNullIfNonNull.java
index 68408f19bc0c..18fb2a854609 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/AssertNonNullIfNonNull.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/AssertNonNullIfNonNull.java
@@ -15,11 +15,11 @@
  * <p>Here is an example use:
  *
  * <pre><code>
- *    {@literal @}AssertNonNullIfNonNull("id")
- *    {@literal @}Pure
- *     public @Nullable Long getId() {
- *         return id;
- *     }
+ *  {@literal @}AssertNonNullIfNonNull("id")
+ *  {@literal @}Pure
+ *  public @Nullable Long getId() {
+ *    return id;
+ *  }
  * </code></pre>
  *
  * Note the direction of the implication. This annotation says that if the result is non-null, then
diff --git a/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/EnsuresNonNullIf.java b/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/EnsuresNonNullIf.java
index d74189c154ce..5d0fcf215b95 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/EnsuresNonNullIf.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/nullness/qual/EnsuresNonNullIf.java
@@ -84,7 +84,7 @@
   /**
    * Returns Java expression(s) that are non-null after the method returns the given result.
    *
-   * @return Java expression(s) that are non-null after the method returns the given result
+   * @return the Java expression(s) that are non-null after the method returns the given result
    * @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
    */
   String[] expression();
diff --git a/src/java.base/share/classes/org/checkerframework/checker/optional/qual/EnsuresPresent.java b/src/java.base/share/classes/org/checkerframework/checker/optional/qual/EnsuresPresent.java
index 8539b7aca7cc..c3c16a099fbe 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/optional/qual/EnsuresPresent.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/optional/qual/EnsuresPresent.java
@@ -15,19 +15,19 @@
  * <p>This postcondition annotation is useful for methods that construct a present Optional:
  *
  * <pre><code>
- *   {@literal @}EnsuresPresent("optStr")
- *   void initialize() {
- *     optStr = Optional.of("abc");
- *   }
+ *  {@literal @}EnsuresPresent("optStr")
+ *  void initialize() {
+ *    optStr = Optional.of("abc");
+ *  }
  * </code></pre>
  *
  * It can also be used for a method that fails if a given Optional value is empty, indicating that
  * the argument is present if the method returns normally:
  *
  * <pre><code>
- *   /** Throws an exception if the argument is empty. *&#47;
- *   {@literal @}EnsuresPresent("#1")
- *   void useTheOptional(Optional&lt;T&gt; arg) { ... }
+ *  /** Throws an exception if the argument is empty. *&#47;
+ *  {@literal @}EnsuresPresent("#1")
+ *  void useTheOptional(Optional&lt;T&gt; arg) { ... }
  * </code></pre>
  *
  * @see Present
diff --git a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/PartialRegex.java b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/PartialRegex.java
index 2519b6749a9d..c4402a2c12f8 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/PartialRegex.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/PartialRegex.java
@@ -21,7 +21,7 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({}) // empty target prevents programmers from writing this in a program
 @InvisibleQualifier
-@SubtypeOf(org.checkerframework.checker.regex.qual.UnknownRegex.class)
+@SubtypeOf(UnknownRegex.class)
 public @interface PartialRegex {
 
   /**
diff --git a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
index e0f226b752ad..2ffcb62ad718 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
@@ -22,6 +22,6 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND})
 @InvisibleQualifier
-@SubtypeOf({Regex.class, org.checkerframework.checker.regex.qual.PartialRegex.class})
+@SubtypeOf({Regex.class, PartialRegex.class})
 @DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
 public @interface RegexBottom {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/signature/qual/SignatureUnknown.java b/src/java.base/share/classes/org/checkerframework/checker/signature/qual/SignatureUnknown.java
index a96229fd6573..515085e1b2f8 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/signature/qual/SignatureUnknown.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/signature/qual/SignatureUnknown.java
@@ -1,6 +1,7 @@
 package org.checkerframework.checker.signature.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -17,7 +18,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-@Target({}) // empty target prevents programmers from writing this in a program
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
 public @interface SignatureUnknown {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Signed.java b/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Signed.java
index 797f4e91339b..8a587363fd98 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Signed.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Signed.java
@@ -32,16 +32,9 @@
       TypeKind.FLOAT,
       TypeKind.DOUBLE
     },
-    types = {
-      java.lang.Byte.class,
-      java.lang.Integer.class,
-      java.lang.Long.class,
-      java.lang.Short.class,
-      java.lang.Float.class,
-      java.lang.Double.class
-    },
+    types = {Byte.class, Integer.class, Long.class, Short.class, Float.class, Double.class},
     value = TypeUseLocation.EXCEPTION_PARAMETER)
 @UpperBoundFor(
     typeKinds = {TypeKind.FLOAT, TypeKind.DOUBLE},
-    types = {java.lang.Float.class, java.lang.Double.class})
+    types = {Float.class, Double.class})
 public @interface Signed {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Unsigned.java b/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Unsigned.java
index 534c5acf00b9..e75a8879a4c9 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Unsigned.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/signedness/qual/Unsigned.java
@@ -23,8 +23,8 @@
 @SubtypeOf({UnknownSignedness.class})
 @DefaultFor(
     typeKinds = {TypeKind.CHAR},
-    types = {java.lang.Character.class})
+    types = {Character.class})
 @UpperBoundFor(
     typeKinds = {TypeKind.CHAR},
-    types = {java.lang.Character.class})
+    types = {Character.class})
 public @interface Unsigned {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/units/qual/PolyUnit.java b/src/java.base/share/classes/org/checkerframework/checker/units/qual/PolyUnit.java
index 0435cb42df4e..bc7a669f824b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/units/qual/PolyUnit.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/units/qual/PolyUnit.java
@@ -18,19 +18,19 @@
  * meters or seconds:
  *
  * <pre><code>
- * {@literal @}PolyUnit int triplePolyUnit(@PolyUnit int amount) {
+ *  {@literal @}PolyUnit int triplePolyUnit(@PolyUnit int amount) {
  *    return 3*amount;
  *  }
  *
  *  void testPolyUnit() {
- *   {@literal @}m int m1 = 7 * UnitsTools.m;
- *   {@literal @}m int m2 = triplePolyUnit(m1);
+ *    {@literal @}m int m1 = 7 * UnitsTools.m;
+ *    {@literal @}m int m2 = triplePolyUnit(m1);
  *
- *   {@literal @}s int sec1 = 7 * UnitsTools.s;
- *   {@literal @}s int sec2 = triplePolyUnit(sec1);
+ *    {@literal @}s int sec1 = 7 * UnitsTools.s;
+ *    {@literal @}s int sec2 = triplePolyUnit(sec1);
  *
- *    // :: error: (assignment)
- *   {@literal @}s int sec3 = triplePolyUnit(m1);
+ *    // :: error: [assignment]
+ *    {@literal @}s int sec3 = triplePolyUnit(m1);
  *  }
  * </code></pre>
  *
diff --git a/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/MaybeLeaked.java b/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/MaybeLeaked.java
index 9038b6b75b01..2afe7ee638eb 100644
--- a/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/MaybeLeaked.java
+++ b/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/MaybeLeaked.java
@@ -1,6 +1,7 @@
 package org.checkerframework.common.aliasing.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -21,7 +22,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
-@Target({})
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @DefaultQualifierInHierarchy
 @SubtypeOf({LeakedToResult.class})
 @InvisibleQualifier
diff --git a/src/java.base/share/classes/org/checkerframework/common/subtyping/qual/Unqualified.java b/src/java.base/share/classes/org/checkerframework/common/subtyping/qual/Unqualified.java
index df08edb7b9b6..3e9b8ab1fcc2 100644
--- a/src/java.base/share/classes/org/checkerframework/common/subtyping/qual/Unqualified.java
+++ b/src/java.base/share/classes/org/checkerframework/common/subtyping/qual/Unqualified.java
@@ -1,6 +1,7 @@
 package org.checkerframework.common.subtyping.qual;
 
 import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
@@ -21,7 +22,7 @@
  */
 @Documented
 @Retention(RetentionPolicy.SOURCE) // don't store in class file
-@Target({}) // empty target prevents programmers from writing this in a program.
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @InvisibleQualifier
 @SubtypeOf({})
 public @interface Unqualified {}
diff --git a/src/java.base/share/classes/org/checkerframework/common/value/qual/DoesNotMatchRegex.java b/src/java.base/share/classes/org/checkerframework/common/value/qual/DoesNotMatchRegex.java
index 8fde439d8e77..e28e35b4d038 100644
--- a/src/java.base/share/classes/org/checkerframework/common/value/qual/DoesNotMatchRegex.java
+++ b/src/java.base/share/classes/org/checkerframework/common/value/qual/DoesNotMatchRegex.java
@@ -12,7 +12,7 @@
  * Java regular expressions. If an expression's type has this annotation, then at run time, the
  * expression evaluates to a string that matches none of the regular expressions. Matching is via
  * the <a
- * href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html#matches(java.lang.String)">java.lang.String#matches</a>
+ * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/String.html#matches(java.lang.String)">java.lang.String#matches</a>
  * method, which matches against the entire string (it does not look for a match against a
  * substring).
  *
diff --git a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromGTENegativeOne.java b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromGTENegativeOne.java
index fc65c4a9f203..a789b43c8a30 100644
--- a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromGTENegativeOne.java
+++ b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromGTENegativeOne.java
@@ -14,7 +14,7 @@
  *
  * <p>IntRangeFromGTENegativeOne annotations derived from GTENegativeOne annotations are used to
  * create IntRange annotations, but IntRangeFromGTENegativeOne annotations are not checked when they
- * appear on the left hand side of expressions. Therefore, the Index Checker MUST be run on any code
+ * appear on the left-hand side of expressions. Therefore, the Index Checker MUST be run on any code
  * with @GTENegativeOne annotations on the left-hand side of expressions, since the Value Checker
  * will derive information from them but not check them.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromNonNegative.java b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromNonNegative.java
index 434ff259de39..23f834b5ac67 100644
--- a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromNonNegative.java
+++ b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromNonNegative.java
@@ -14,7 +14,7 @@
  *
  * <p>IntRangeFromNonNegative annotations derived from NonNegative annotations are used to create
  * IntRange annotations, but IntRangeFromNonNegative annotations are not checked when they appear on
- * the left hand side of expressions. Therefore, the Index Checker MUST be run on any code
+ * the left-hand side of expressions. Therefore, the Index Checker MUST be run on any code
  * with @NonNegative annotations on the left-hand side of expressions, since the Value Checker will
  * derive information from them but not check them.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromPositive.java b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromPositive.java
index 4941505975a3..47f6517a9786 100644
--- a/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromPositive.java
+++ b/src/java.base/share/classes/org/checkerframework/common/value/qual/IntRangeFromPositive.java
@@ -13,10 +13,10 @@
  * annotation.
  *
  * <p>IntRangeFromPositive annotations derived from Positive annotations are used to create IntRange
- * annotations, but IntRangeFromPositive annotations are not checked when they appear on the left
- * hand side of expressions. Therefore, the Index Checker MUST be run on any code with @Positive
- * annotations on the left-hand side of expressions, since the Value Checker will derive information
- * from them but not check them.
+ * annotations, but IntRangeFromPositive annotations are not checked when they appear on the
+ * left-hand side of expressions. Therefore, the Index Checker MUST be run on any code
+ * with @Positive annotations on the left-hand side of expressions, since the Value Checker will
+ * derive information from them but not check them.
  *
  * <p>It is an error to write this annotation directly. {@code @Positive} or {@code IntRange(from =
  * 1, to = Integer.MAX_VALUE)} should always be written instead. This annotation is not retained in
diff --git a/src/java.base/share/classes/org/checkerframework/common/value/qual/MatchesRegex.java b/src/java.base/share/classes/org/checkerframework/common/value/qual/MatchesRegex.java
index 5c10b127c353..2813aba32b92 100644
--- a/src/java.base/share/classes/org/checkerframework/common/value/qual/MatchesRegex.java
+++ b/src/java.base/share/classes/org/checkerframework/common/value/qual/MatchesRegex.java
@@ -12,7 +12,7 @@
  * Java regular expressions. If an expression's type has this annotation, then at run time, the
  * expression evaluates to a string that matches at least one of the regular expressions. Matching
  * is via the <a
- * href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html#matches(java.lang.String)">java.lang.String#matches</a>
+ * href="https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/String.html#matches(java.lang.String)">java.lang.String#matches</a>
  * method, which matches against the entire string (it does not look for a match against a
  * substring).
  *
diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java b/src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java
new file mode 100644
index 000000000000..329ea505d64e
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java
@@ -0,0 +1,31 @@
+package org.checkerframework.dataflow.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * At a call to a side-effecting method, the framework ordinarily discards all refined type
+ * information, since the side-effecting method might invalidate that information. This annotation
+ * indicates that, at a call to the annotated method, the receiver's type should not be unrefined.
+ * That is, a call to the method does not affect the type qualifier (in the given hierarchy).
+ *
+ * @checker_framework.manual #type-refinement-purity Side effects, determinism, purity, and
+ *     flow-sensitive analysis
+ */
+// @InheritedAnnotation cannot be written here, because "dataflow" project cannot depend on
+// "framework" project.
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+public @interface DoesNotUnrefineReceiver {
+  /**
+   * The name of the checker(s) that this annotation affects. For example, "modifiability" or
+   * "nullness". Use "allcheckers" to affect all checkers.
+   *
+   * @return the name of the checker that this annotation affects
+   */
+  String[] value();
+}
diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
deleted file mode 100644
index ab6a7dd1718f..000000000000
--- a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package org.checkerframework.dataflow.qual;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-import org.checkerframework.framework.qual.JavaExpression;
-
-/**
- * A method annotated with the declaration annotation {@code @SideEffectsOnly("A", "B")} changes the
- * value of at most the expressions A and B. All other expressions have the same value before and
- * after a call to the method.
- *
- * @checker_framework.manual #type-refinement-purity Specifying side effects
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
-public @interface SideEffectsOnly {
-  /**
-   * An upper bound on the expressions that this method might change the value of.
-   *
-   * @return the Java expressions that the annotated method might side-effect
-   * @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
-   */
-  @JavaExpression
-  public String[] value();
-}
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/CFComment.java b/src/java.base/share/classes/org/checkerframework/framework/qual/CFComment.java
index f9ef370b5914..f7b6fa75c2ec 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/CFComment.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/CFComment.java
@@ -13,9 +13,9 @@
  * <p>Here is an example:
  *
  * <pre><code>
- * {@literal @}CFComment("interning: factory methods guarantee that all elements are interned")
+ *  {@literal @}CFComment("interning: factory methods guarantee that all elements are interned")
  *  public class MyClass {
- *   {@literal @}CFComment({"nullness: non-null return type is more specific than in superclass",
+ *    {@literal @}CFComment({"nullness: non-null return type is more specific than in superclass",
  *                "signedness: comment related to Signedness type system"})
  *    public String myMethod() { ... }
  * }
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/EnsuresQualifierIf.java b/src/java.base/share/classes/org/checkerframework/framework/qual/EnsuresQualifierIf.java
index e7637ba890bf..d1f9ff997f99 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/EnsuresQualifierIf.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/EnsuresQualifierIf.java
@@ -18,10 +18,10 @@
  * <p>Here is an example use:
  *
  * <pre><code>
- *   {@literal @}EnsuresQualifierIf(result = true, expression = "#1", qualifier = Odd.class)
- *    boolean isOdd(int p1, int p2) {
- *        return p1 % 2 == 1;
- *    }
+ *  {@literal @}EnsuresQualifierIf(result = true, expression = "#1", qualifier = Odd.class)
+ *   boolean isOdd(int p1, int p2) {
+ *     return p1 % 2 == 1;
+ *   }
  * </code></pre>
  *
  * <p>This annotation is only applicable to methods with a boolean return type.
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/PostconditionAnnotation.java b/src/java.base/share/classes/org/checkerframework/framework/qual/PostconditionAnnotation.java
index 67bb434e8483..2017eccd81f3 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/PostconditionAnnotation.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/PostconditionAnnotation.java
@@ -31,8 +31,8 @@
  * org.checkerframework.common.value.qual.MinLen} qualifier:
  *
  * <pre><code>
- * {@literal @}PostconditionAnnotation(qualifier = MinLen.class)
- * {@literal @}Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+ *  {@literal @}PostconditionAnnotation(qualifier = MinLen.class)
+ *  {@literal @}Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
  *  public {@literal @}interface EnsuresMinLen {
  *    String[] value();
  *    {@literal @}QualifierArgument("value")
@@ -47,7 +47,7 @@
  * {@code @MinLen(2)} upon return.
  *
  * <pre><code>
- * {@literal @}EnsuresMinLen(value = "field", targetValue = 2")
+ *  {@literal @}EnsuresMinLen(value = "field", targetValue = 2)
  *  public void setField(String argument) {
  *    field = "(" + argument + ")";
  *  }
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java b/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
index 95af23ec3761..a3ab69c41550 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
@@ -27,12 +27,12 @@
  * org.checkerframework.common.value.qual.MinLen} qualifier:
  *
  * <pre><code>
- * {@literal @}PreconditionAnnotation(qualifier = MinLen.class)
- * {@literal @}Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
- * public {@literal @}interface RequiresMinLen {
- *   String[] value();
- *   {@literal @}QualifierArgument("value")
- *   int targetValue() default 0;
+ *  {@literal @}PreconditionAnnotation(qualifier = MinLen.class)
+ *  {@literal @}Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+ *  public {@literal @}interface RequiresMinLen {
+ *    String[] value();
+ *    {@literal @}QualifierArgument("value")
+ *    int targetValue() default 0;
  * </code></pre>
  *
  * The {@code value} element holds the expressions to which the qualifier applies and {@code
@@ -43,10 +43,10 @@
  * {@code @MinLen(2)} upon entry.
  *
  * <pre><code>
- * {@literal @}RequiresMinLen(value = "field", targetValue = 2")
- * public char getThirdCharacter() {
- *   return field.charAt(2);
- * }
+ *  {@literal @}RequiresMinLen(value = "field", targetValue = 2")
+ *  public char getThirdCharacter() {
+ *    return field.charAt(2);
+ *  }
  * </code></pre>
  *
  * @see RequiresQualifier

From 6905f4ed8a0a95322700284f4bbf37b70e2f8dff Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 13:00:50 -0700
Subject: [PATCH 045/119] Restore `@SideEffectsOnly`

---
 .../dataflow/qual/SideEffectsOnly.java        | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java

diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
new file mode 100644
index 000000000000..ab6a7dd1718f
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
@@ -0,0 +1,29 @@
+package org.checkerframework.dataflow.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.JavaExpression;
+
+/**
+ * A method annotated with the declaration annotation {@code @SideEffectsOnly("A", "B")} changes the
+ * value of at most the expressions A and B. All other expressions have the same value before and
+ * after a call to the method.
+ *
+ * @checker_framework.manual #type-refinement-purity Specifying side effects
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
+public @interface SideEffectsOnly {
+  /**
+   * An upper bound on the expressions that this method might change the value of.
+   *
+   * @return the Java expressions that the annotated method might side-effect
+   * @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
+   */
+  @JavaExpression
+  public String[] value();
+}

From e07fa4158462e3f6fdb8e357fad135e35f63880f Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 18:46:40 -0700
Subject: [PATCH 046/119] Add imports

---
 .../share/classes/java/io/ObjectOutputStream.java          | 1 +
 src/java.base/share/classes/java/lang/LiveStackFrame.java  | 2 ++
 .../share/classes/java/lang/LiveStackFrameInfo.java        | 2 ++
 src/java.base/share/classes/java/lang/StringLatin1.java    | 3 +++
 src/java.base/share/classes/java/lang/StringUTF16.java     | 3 +++
 src/java.base/share/classes/java/lang/ThreadLocal.java     | 1 +
 src/java.base/share/classes/java/util/AbstractList.java    | 1 +
 src/java.base/share/classes/java/util/AbstractQueue.java   | 1 +
 .../share/classes/java/util/AbstractSequentialList.java    | 7 ++++---
 src/java.base/share/classes/java/util/ArrayList.java       | 1 +
 src/java.base/share/classes/java/util/Arrays.java          | 1 +
 .../share/classes/java/util/ImmutableCollections.java      | 1 +
 src/java.base/share/classes/java/util/LinkedHashSet.java   | 2 ++
 src/java.base/share/classes/java/util/NavigableSet.java    | 1 +
 .../share/classes/java/util/ReverseOrderDequeView.java     | 3 +++
 .../share/classes/java/util/ReverseOrderListView.java      | 4 ++++
 .../share/classes/java/util/ReverseOrderSortedMapView.java | 2 ++
 .../share/classes/java/util/ReverseOrderSortedSetView.java | 2 ++
 .../share/classes/java/util/SequencedCollection.java       | 1 +
 src/java.base/share/classes/java/util/SequencedMap.java    | 5 +++--
 20 files changed, 39 insertions(+), 5 deletions(-)

diff --git a/src/java.base/share/classes/java/io/ObjectOutputStream.java b/src/java.base/share/classes/java/io/ObjectOutputStream.java
index 7c25218bea74..1b8b465e512d 100644
--- a/src/java.base/share/classes/java/io/ObjectOutputStream.java
+++ b/src/java.base/share/classes/java/io/ObjectOutputStream.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.mustcall.qual.MustCallAlias;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.PolySigned;
+import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.security.AccessController;
diff --git a/src/java.base/share/classes/java/lang/LiveStackFrame.java b/src/java.base/share/classes/java/lang/LiveStackFrame.java
index 556ec2eb3e6c..d5aba81992b0 100644
--- a/src/java.base/share/classes/java/lang/LiveStackFrame.java
+++ b/src/java.base/share/classes/java/lang/LiveStackFrame.java
@@ -24,6 +24,8 @@
  */
 package java.lang;
 
+import org.checkerframework.dataflow.qual.Pure;
+
 import java.lang.StackWalker.StackFrame;
 import java.util.EnumSet;
 import java.util.Set;
diff --git a/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java b/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
index 335980a6e4cd..d95db71f4055 100644
--- a/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
+++ b/src/java.base/share/classes/java/lang/LiveStackFrameInfo.java
@@ -24,6 +24,8 @@
  */
 package java.lang;
 
+import org.checkerframework.dataflow.qual.Pure;
+
 final class LiveStackFrameInfo extends StackFrameInfo implements LiveStackFrame {
     private static Object[] EMPTY_ARRAY = new Object[0];
 
diff --git a/src/java.base/share/classes/java/lang/StringLatin1.java b/src/java.base/share/classes/java/lang/StringLatin1.java
index f9586f8aaf29..c55f3a8aa319 100644
--- a/src/java.base/share/classes/java/lang/StringLatin1.java
+++ b/src/java.base/share/classes/java/lang/StringLatin1.java
@@ -25,6 +25,9 @@
 
 package java.lang;
 
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.Pure;
+
 import java.util.Arrays;
 import java.util.Locale;
 import java.util.Spliterator;
diff --git a/src/java.base/share/classes/java/lang/StringUTF16.java b/src/java.base/share/classes/java/lang/StringUTF16.java
index 9739aa9de5a9..394192376000 100644
--- a/src/java.base/share/classes/java/lang/StringUTF16.java
+++ b/src/java.base/share/classes/java/lang/StringUTF16.java
@@ -25,6 +25,9 @@
 
 package java.lang;
 
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.Pure;
+
 import java.util.Arrays;
 import java.util.Locale;
 import java.util.Spliterator;
diff --git a/src/java.base/share/classes/java/lang/ThreadLocal.java b/src/java.base/share/classes/java/lang/ThreadLocal.java
index c5cdf0e453e4..29144c0e7f7a 100644
--- a/src/java.base/share/classes/java/lang/ThreadLocal.java
+++ b/src/java.base/share/classes/java/lang/ThreadLocal.java
@@ -26,6 +26,7 @@
 package java.lang;
 
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
 
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index 10a0755237b7..ebc730d871f7 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index f76dc1db8253..d50e5506893c 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 /**
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index dae955bcf7d6..98a3c2c6342a 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -27,10 +27,11 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
+import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -252,7 +253,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this,
      * @return an iterator over the elements in this list (in proper sequence)
      */
     @SideEffectFree
-    public @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyModifiable @PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractSequentialList<E> this) {
         return listIterator();
     }
 
@@ -266,5 +267,5 @@ public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this,
      *         sequence)
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public abstract @PolyModifiable @PolyGrowShrink ListIterator<E> listIterator(@PolyModifiable @PolyGrowShrink AbstractSequentialList<E> this, int index);
+    public abstract @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractSequentialList<E> this, int index);
 }
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 17267e39925f..e9fe34602084 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -45,6 +45,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index 56e8ca0b6b7e..2698381ad278 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.checker.signedness.qual.Unsigned;
 import org.checkerframework.common.value.qual.MinLen;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/ImmutableCollections.java b/src/java.base/share/classes/java/util/ImmutableCollections.java
index f13c483463f4..99fca6053987 100644
--- a/src/java.base/share/classes/java/util/ImmutableCollections.java
+++ b/src/java.base/share/classes/java/util/ImmutableCollections.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
+import org.checkerframework.common.value.qual.StaticallyExecutable;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index dd2723084ab5..285bff113405 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -30,7 +30,9 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
+import org.checkerframework.dataflow.qual.Deterministic;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.dataflow.qual.Pure;
 
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 8c600a90b269..3eff9dee501c 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderDequeView.java b/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
index 38e62869d42a..54fec04eae4c 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderDequeView.java
@@ -25,6 +25,9 @@
 
 package java.util;
 
+import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
+
 import java.util.function.Consumer;
 import java.util.function.IntFunction;
 import java.util.stream.Stream;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderListView.java b/src/java.base/share/classes/java/util/ReverseOrderListView.java
index 4826354fb5ea..8302b16137d3 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderListView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderListView.java
@@ -25,6 +25,10 @@
 
 package java.util;
 
+import org.checkerframework.common.value.qual.StaticallyExecutable;
+import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.SideEffectFree;
+
 import java.util.Objects;
 import java.util.function.Consumer;
 import java.util.function.IntFunction;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 60c1486e15f5..8e750326b3c7 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,6 +25,8 @@
 
 package java.util;
 
+import org.checkerframework.dataflow.qual.Pure;
+
 /**
  * Provides a reversed-ordered view of a SortedMap. Not serializable.
  *
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
index 36774ea6454e..505087b6b467 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
@@ -25,6 +25,8 @@
 
 package java.util;
 
+import org.checkerframework.dataflow.qual.SideEffectFree;
+
 import java.util.function.Consumer;
 import java.util.function.IntFunction;
 import java.util.stream.Stream;
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index eb0960b4c4eb..3f722060ae60 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.dataflow.qual.Pure;
 
 
 /**
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 492615adabc0..52ae67e1a92a 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -25,14 +25,15 @@
 
 package java.util;
 
-import jdk.internal.util.NullableKeyValueHolder;
-
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.dataflow.qual.SideEffectFree;
+
+import jdk.internal.util.NullableKeyValueHolder;
 
 /**
  * A Map that has a well-defined encounter order, that supports operations at both ends, and

From e6d91b7e27d6eb16ffc96baf7df2e34aba518a4e Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 20:18:05 -0700
Subject: [PATCH 047/119] Add imports

---
 README.md                                                        | 1 +
 .../share/classes/java/util/AbstractSequentialList.java          | 1 +
 .../share/classes/java/util/ReverseOrderSortedSetView.java       | 1 +
 src/java.base/share/classes/java/util/stream/DoublePipeline.java | 1 +
 src/java.base/share/classes/java/util/stream/IntPipeline.java    | 1 +
 src/java.base/share/classes/java/util/stream/LongPipeline.java   | 1 +
 .../share/classes/jdk/internal/jimage/ImageStringsReader.java    | 1 +
 src/java.base/share/classes/jdk/internal/util/ArraysSupport.java | 1 +
 8 files changed, 8 insertions(+)

diff --git a/README.md b/README.md
index 383fb269c884..281d04e81396 100644
--- a/README.md
+++ b/README.md
@@ -158,6 +158,7 @@ merge conflicts.)
 ```sh
 cd jdk21u
 git pull && \
+git pull ../jdk && /
 git pull https://github.com/openjdk/jdk21u.git && \
 git pull https://github.com/typetools/jdk.git
 ```
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 98a3c2c6342a..96f4622967f6 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
index 505087b6b467..0cc67edb6197 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
@@ -25,6 +25,7 @@
 
 package java.util;
 
+import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
 import java.util.function.Consumer;
diff --git a/src/java.base/share/classes/java/util/stream/DoublePipeline.java b/src/java.base/share/classes/java/util/stream/DoublePipeline.java
index bb4c3d8a8962..7b388c30bbb4 100644
--- a/src/java.base/share/classes/java/util/stream/DoublePipeline.java
+++ b/src/java.base/share/classes/java/util/stream/DoublePipeline.java
@@ -24,6 +24,7 @@
  */
 package java.util.stream;
 
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import java.util.DoubleSummaryStatistics;
 import java.util.Objects;
 import java.util.OptionalDouble;
diff --git a/src/java.base/share/classes/java/util/stream/IntPipeline.java b/src/java.base/share/classes/java/util/stream/IntPipeline.java
index 6b3b31d80846..41a93b7485ce 100644
--- a/src/java.base/share/classes/java/util/stream/IntPipeline.java
+++ b/src/java.base/share/classes/java/util/stream/IntPipeline.java
@@ -24,6 +24,7 @@
  */
 package java.util.stream;
 
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import java.util.IntSummaryStatistics;
 import java.util.Objects;
 import java.util.OptionalDouble;
diff --git a/src/java.base/share/classes/java/util/stream/LongPipeline.java b/src/java.base/share/classes/java/util/stream/LongPipeline.java
index ebf3e6a0acaf..9dc393080759 100644
--- a/src/java.base/share/classes/java/util/stream/LongPipeline.java
+++ b/src/java.base/share/classes/java/util/stream/LongPipeline.java
@@ -24,6 +24,7 @@
  */
 package java.util.stream;
 
+import org.checkerframework.dataflow.qual.SideEffectFree;
 import java.util.LongSummaryStatistics;
 import java.util.Objects;
 import java.util.OptionalDouble;
diff --git a/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java b/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
index b07f752908c9..552ce55f05b2 100644
--- a/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
+++ b/src/java.base/share/classes/jdk/internal/jimage/ImageStringsReader.java
@@ -25,6 +25,7 @@
 
 package jdk.internal.jimage;
 
+import org.checkerframework.dataflow.qual.Pure;
 import java.io.UTFDataFormatException;
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
diff --git a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
index daeb71a58cea..0a8deadac002 100644
--- a/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
+++ b/src/java.base/share/classes/jdk/internal/util/ArraysSupport.java
@@ -24,6 +24,7 @@
  */
 package jdk.internal.util;
 
+import org.checkerframework.dataflow.qual.Pure;
 import java.util.Arrays;
 import java.util.Collection;
 import jdk.internal.access.JavaLangAccess;

From c0b805c517e32a41b533459905662f17727d5ac9 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 21:14:39 -0700
Subject: [PATCH 048/119] Add imports

---
 .../share/classes/java/util/AbstractSequentialList.java        | 3 ++-
 src/java.base/share/classes/java/util/SortedSet.java           | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 96f4622967f6..31c5e77a0b6d 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -27,10 +27,11 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
-import org.checkerframework.checker.index.qual.Shrinkable;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 0c82154527c3..796dee2ba8bf 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;

From 5bb1743e21d9b2c8302dc3caa4088d555ce82341 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 11 Apr 2026 21:53:01 -0700
Subject: [PATCH 049/119] Fixes

---
 src/java.base/share/classes/java/util/Map.java                  | 2 +-
 .../share/classes/java/util/concurrent/ConcurrentHashMap.java   | 2 +-
 .../classes/java/util/concurrent/CopyOnWriteArrayList.java      | 1 -
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index a21052e75bb3..732873660134 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -1818,7 +1818,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      * @since 10
      */
     @SuppressWarnings({"rawtypes","unchecked"})
-    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@UnknownModifiablity @PolyNonEmpty Map<? extends K, ? extends V> map) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@UnknownModifiability @PolyNonEmpty Map<? extends K, ? extends V> map) {
         if (map instanceof ImmutableCollections.AbstractImmutableMap) {
             return (Map<K,V>)map;
         } else if (map.isEmpty()) { // Implicit nullcheck of map
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 2750df4daa55..f5b7edc85fcc 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -4371,7 +4371,7 @@ public <U> U searchEntries(long parallelismThreshold,
      * @since 1.8
      */
     public Map.Entry<K,V> reduceEntries(long parallelismThreshold,
-                                        BiFunction<? super Map.@Unmodifiable Entry<K,V>, ? super Map.@Unmodifiable Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
+                                        BiFunction<? super Map.Entry<K,V>, ? super Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
         if (reducer == null) throw new NullPointerException();
         return new ReduceEntriesTask<K,V>
             (null, batchFor(parallelismThreshold), 0, 0, table,
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index ac683901d348..b242e33dcf19 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -1469,7 +1469,6 @@ public boolean containsAll(Collection<? extends @NonNull @UnknownSignedness Obje
 
         @Pure
         @EnsuresNonEmptyIf(result = false, expression = "this")
-        @Pure
         public boolean isEmpty() {
             return size() == 0;
         }

From cd6c88d953261bc8c6ef891c507ee2913377c9e3 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 12 Apr 2026 09:03:40 -0700
Subject: [PATCH 050/119] Undo change to Java type

---
 .../share/classes/java/util/concurrent/ConcurrentHashMap.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index f5b7edc85fcc..0bac4223215b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -4371,7 +4371,7 @@ public <U> U searchEntries(long parallelismThreshold,
      * @since 1.8
      */
     public Map.Entry<K,V> reduceEntries(long parallelismThreshold,
-                                        BiFunction<? super Map.Entry<K,V>, ? super Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
+                                        BiFunction<Map.Entry<K,V>, Map.Entry<K,V>, ? extends Map.Entry<K,V>> reducer) {
         if (reducer == null) throw new NullPointerException();
         return new ReduceEntriesTask<K,V>
             (null, batchFor(parallelismThreshold), 0, 0, table,

From 168d92f8ac64cb0819011f7dc0afe8698bce61f6 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 12 Apr 2026 09:25:52 -0700
Subject: [PATCH 051/119] Fix YAML formatting

---
 .azure/azure-pipelines.yml    | 630 +++++++++++++++++-----------------
 .azure/azure-pipelines.yml.m4 | 212 ++++++------
 .azure/defs.m4                |  82 ++---
 3 files changed, 462 insertions(+), 462 deletions(-)

diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
index 3307844d84e8..0e32505f2461 100644
--- a/.azure/azure-pipelines.yml
+++ b/.azure/azure-pipelines.yml
@@ -5,322 +5,322 @@ variables:
 
 jobs:
 
-- job: build_jdk
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21-plus:latest
-  steps:
-  - bash: |
-      whoami
-      git config --get remote.origin.url
-      pwd
-      ls -al
-      env | sort
-    displayName: show environment
-  - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
-    displayName: configure
-  - bash: make jdk
-    timeoutInMinutes: 90
-    displayName: make jdk
-  ## This works only after `make images`
-  # - bash: build/*/images/jdk/bin/java -version
-  #   displayName: version
-  ## Don't run tests, which pass only with old version of tools (compilers, etc.).
-  # - bash: make -C /jdk run-test-tier1
-  #   displayName: make run-test-tier1
+  - job: build_jdk
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    steps:
+      - bash: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+        displayName: show environment
+      - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
+        displayName: configure
+      - bash: make jdk
+        timeoutInMinutes: 90
+        displayName: make jdk
+        ## This works only after `make images`
+        # - bash: build/*/images/jdk/bin/java -version
+        #   displayName: version
+        ## Don't run tests, which pass only with old version of tools (compilers, etc.).
+        # - bash: make -C /jdk run-test-tier1
+        #   displayName: make run-test-tier1
 
-- job: build_jdk21u
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21-plus:latest
-  timeoutInMinutes: 0
-  steps:
-  - bash: |
-      whoami
-      git config --get remote.origin.url
-      pwd
-      ls -al
-      env | sort
-    displayName: show environment
-  - bash: |
-      set -ex
-      if test -d /tmp/$USER/git-scripts ; \
-        then git -C /tmp/$USER/git-scripts pull -q > /dev/null 2>&1 ; \
-        else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git ; \
-      fi
-    displayName: git-scripts
-  - bash: |
-      set -ex
-      if test -d /tmp/$USER/plume-scripts ; \
-        then git -C /tmp/$USER/plume-scripts pull -q > /dev/null 2>&1 ; \
-        else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/plume-scripts.git ; \
-      fi
-    displayName: plume-scripts
-  # This creates ../jdk21u .
-  # Run `git-clone-related` without a limit on depth, because if the depth is
-  # too small, the merge will fail.  Don't use "--filter=blob:none" because that
-  # leads to "fatal: remote error:  filter 'combine' not supported".
-  - bash: |
-      set -ex
-      echo "pwd = $(pwd)"
-      if test -d ../jdk21u; then
-        echo "../jdk21u should not exist yet"
-        false
-      fi
-      df .
-      /tmp/$USER/git-scripts/git-clone-related typetools jdk21u ../jdk21u --single-branch
-      git config --global user.email "you@example.com"
-      git config --global user.name "Your Name"
-      git config --global core.longpaths true
-      git config --global core.protectNTFS false
-      cd ../jdk21u
-      git diff --exit-code
-      echo $?
-    displayName: clone-related-jdk21u
-  - bash: |
-      cd ../jdk21u && git status
-      eval $(/tmp/$USER/plume-scripts/ci-info typetools)
-      set
-      echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
-    displayName: git merge plan
-  - bash: |
-      set -ex
-      git config --global user.email "you@example.com"
-      git config --global user.name "Your Name"
-      git config --global pull.ff true
-      git config --global pull.rebase false
-      git config --global core.longpaths true
-      git config --global core.protectNTFS false
-      cd ../jdk21u && git status
-      eval $(/tmp/$USER/plume-scripts/ci-info typetools)
-      set
-      echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
-      cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
-    displayName: git merge
-  - bash: cd ../jdk21u && export JT_HOME=/usr/share/jtreg && bash ./configure --with-jtreg --disable-warnings-as-errors
-    displayName: configure
-  - bash: cd ../jdk21u && make jdk
-    displayName: make jdk
-  ## This works only after `make images`
-  # - bash: cd ../jdk21u && build/*/images/jdk/bin/java -version
-  #   displayName: version
-  # - bash: make -C /jdk21u run-test-tier1
-  #   timeoutInMinutes: 0
-  #   displayName: make run-test-tier1
-  # - bash: make -C /jdk21u :test/jdk:tier1
-  ## Temporarily comment out because of trouble finding junit and jasm
-  # - bash: cd ../jdk21u && make run-test TEST="jtreg:test/jdk:tier1"
-  #   timeoutInMinutes: 0
-  #   displayName: make run-test
+  - job: build_jdk21u
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    timeoutInMinutes: 0
+    steps:
+      - bash: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+        displayName: show environment
+      - bash: |
+          set -ex
+          if test -d /tmp/$USER/git-scripts ; \
+            then git -C /tmp/$USER/git-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git ; \
+          fi
+        displayName: git-scripts
+      - bash: |
+          set -ex
+          if test -d /tmp/$USER/plume-scripts ; \
+            then git -C /tmp/$USER/plume-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/plume-scripts.git ; \
+          fi
+        displayName: plume-scripts
+        # This creates ../jdk21u .
+        # Run `git-clone-related` without a limit on depth, because if the depth is
+        # too small, the merge will fail.  Don't use "--filter=blob:none" because that
+        # leads to "fatal: remote error:  filter 'combine' not supported".
+      - bash: |
+          set -ex
+          echo "pwd = $(pwd)"
+          if test -d ../jdk21u; then
+            echo "../jdk21u should not exist yet"
+            false
+          fi
+          df .
+          /tmp/$USER/git-scripts/git-clone-related typetools jdk21u ../jdk21u --single-branch
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u
+          git diff --exit-code
+          echo $?
+        displayName: clone-related-jdk21u
+      - bash: |
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+        displayName: git merge plan
+      - bash: |
+          set -ex
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global pull.ff true
+          git config --global pull.rebase false
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+          cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
+        displayName: git merge
+      - bash: cd ../jdk21u && export JT_HOME=/usr/share/jtreg && bash ./configure --with-jtreg --disable-warnings-as-errors
+        displayName: configure
+      - bash: cd ../jdk21u && make jdk
+        displayName: make jdk
+        ## This works only after `make images`
+        # - bash: cd ../jdk21u && build/*/images/jdk/bin/java -version
+        #   displayName: version
+        # - bash: make -C /jdk21u run-test-tier1
+        #   timeoutInMinutes: 0
+        #   displayName: make run-test-tier1
+        # - bash: make -C /jdk21u :test/jdk:tier1
+        ## Temporarily comment out because of trouble finding junit and jasm
+        # - bash: cd ../jdk21u && make run-test TEST="jtreg:test/jdk:tier1"
+        #   timeoutInMinutes: 0
+        #   displayName: make run-test
 
-- job: cftests_junit_jdk17
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
-    displayName: test-cftests-junit.sh
-- job: cftests_nonjunit_jdk17
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
-    displayName: test-cftests-nonjunit.sh
-- job: cftests_typecheck_jdk17
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
-    displayName: test-typecheck.sh
-- job: cftests_junit_jdk21
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
-    displayName: test-cftests-junit.sh
-- job: cftests_nonjunit_jdk21
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
-    displayName: test-cftests-nonjunit.sh
-- job: cftests_inference_jdk21
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
-    displayName: test-cftests-inference.sh
-- job: cftests_typecheck_jdk21
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
-    displayName: test-typecheck.sh
-- job: cftests_junit_jdk25
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk25:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
-    displayName: test-cftests-junit.sh
-- job: cftests_nonjunit_jdk25
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk25:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
-    displayName: test-cftests-nonjunit.sh
-- job: cftests_inference_jdk25
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk25:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
-    displayName: test-cftests-inference.sh
-- job: cftests_typecheck_jdk25
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk25:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
-    displayName: test-typecheck.sh
+  - job: cftests_junit_jdk17
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+        displayName: test-cftests-junit.sh
+  - job: cftests_nonjunit_jdk17
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+        displayName: test-cftests-nonjunit.sh
+  - job: cftests_typecheck_jdk17
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+        displayName: test-typecheck.sh
+  - job: cftests_junit_jdk21
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+        displayName: test-cftests-junit.sh
+  - job: cftests_nonjunit_jdk21
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+        displayName: test-cftests-nonjunit.sh
+  - job: cftests_inference_jdk21
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
+        displayName: test-cftests-inference.sh
+  - job: cftests_typecheck_jdk21
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+        displayName: test-typecheck.sh
+  - job: cftests_junit_jdk25
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+        displayName: test-cftests-junit.sh
+  - job: cftests_nonjunit_jdk25
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+        displayName: test-cftests-nonjunit.sh
+  - job: cftests_inference_jdk25
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
+        displayName: test-cftests-inference.sh
+  - job: cftests_typecheck_jdk25
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+        displayName: test-typecheck.sh
 
-- job: test_daikon_part1
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  timeoutInMinutes: 70
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part1.sh)
-    displayName: test-daikon-part1.sh
-- job: test_daikon_part2
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  timeoutInMinutes: 70
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part2.sh)
-    displayName: test-daikon-part2.sh
-- job: test_daikon_part3
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  timeoutInMinutes: 70
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part3.sh)
-    displayName: test-daikon-part3.sh
+  - job: test_daikon_part1
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    timeoutInMinutes: 70
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part1.sh)
+        displayName: test-daikon-part1.sh
+  - job: test_daikon_part2
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    timeoutInMinutes: 70
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part2.sh)
+        displayName: test-daikon-part2.sh
+  - job: test_daikon_part3
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    timeoutInMinutes: 70
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part3.sh)
+        displayName: test-daikon-part3.sh
 
-- job: test_plume_lib
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-plume-lib.sh)
-    displayName: test-plume-lib.sh
+  - job: test_plume_lib
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-plume-lib.sh)
+        displayName: test-plume-lib.sh
diff --git a/.azure/azure-pipelines.yml.m4 b/.azure/azure-pipelines.yml.m4
index d7aaea4c3482..c152a8c5e538 100644
--- a/.azure/azure-pipelines.yml.m4
+++ b/.azure/azure-pipelines.yml.m4
@@ -8,113 +8,113 @@ variables:
 
 jobs:
 
-- job: build_jdk
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21-plus:latest
-  steps:
-  - bash: |
-      whoami
-      git config --get remote.origin.url
-      pwd
-      ls -al
-      env | sort
-    displayName: show environment
-  - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
-    displayName: configure
-  - bash: make jdk
-    timeoutInMinutes: 90
-    displayName: make jdk
-  ## This works only after `make images`
-  # - bash: build/*/images/jdk/bin/java -version
-  #   displayName: version
-  ## Don't run tests, which pass only with old version of tools (compilers, etc.).
-  # - bash: make -C /jdk run-test-tier1
-  #   displayName: make run-test-tier1
+  - job: build_jdk
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    steps:
+      - bash: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+        displayName: show environment
+      - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
+        displayName: configure
+      - bash: make jdk
+        timeoutInMinutes: 90
+        displayName: make jdk
+        ## This works only after `make images`
+        # - bash: build/*/images/jdk/bin/java -version
+        #   displayName: version
+        ## Don't run tests, which pass only with old version of tools (compilers, etc.).
+        # - bash: make -C /jdk run-test-tier1
+        #   displayName: make run-test-tier1
 
-- job: build_jdk21u
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk21-plus:latest
-  timeoutInMinutes: 0
-  steps:
-  - bash: |
-      whoami
-      git config --get remote.origin.url
-      pwd
-      ls -al
-      env | sort
-    displayName: show environment
-  - bash: |
-      set -ex
-      if test -d /tmp/$USER/git-scripts ; \
-        then git -C /tmp/$USER/git-scripts pull -q > /dev/null 2>&1 ; \
-        else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git ; \
-      fi
-    displayName: git-scripts
-  - bash: |
-      set -ex
-      if test -d /tmp/$USER/plume-scripts ; \
-        then git -C /tmp/$USER/plume-scripts pull -q > /dev/null 2>&1 ; \
-        else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/plume-scripts.git ; \
-      fi
-    displayName: plume-scripts
-  # This creates ../jdk21u .
-  # Run `git-clone-related` without a limit on depth, because if the depth is
-  # too small, the merge will fail.  Don't use "--filter=blob:none" because that
-  # leads to "fatal: remote error:  filter 'combine' not supported".
-  - bash: |
-      set -ex
-      echo "pwd = $(pwd)"
-      if test -d ../jdk21u; then
-        echo "../jdk21u should not exist yet"
-        false
-      fi
-      df .
-      /tmp/$USER/git-scripts/git-clone-related typetools jdk21u ../jdk21u --single-branch
-      git config --global user.email "you@example.com"
-      git config --global user.name "Your Name"
-      git config --global core.longpaths true
-      git config --global core.protectNTFS false
-      cd ../jdk21u
-      git diff --exit-code
-      echo $?
-    displayName: clone-related-jdk21u
-  - bash: |
-      cd ../jdk21u && git status
-      eval $(/tmp/$USER/plume-scripts/ci-info typetools)
-      set
-      echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
-    displayName: git merge plan
-  - bash: |
-      set -ex
-      git config --global user.email "you@example.com"
-      git config --global user.name "Your Name"
-      git config --global pull.ff true
-      git config --global pull.rebase false
-      git config --global core.longpaths true
-      git config --global core.protectNTFS false
-      cd ../jdk21u && git status
-      eval $(/tmp/$USER/plume-scripts/ci-info typetools)
-      set
-      echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
-      cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
-    displayName: git merge
-  - bash: cd ../jdk21u && export JT_HOME=/usr/share/jtreg && bash ./configure --with-jtreg --disable-warnings-as-errors
-    displayName: configure
-  - bash: cd ../jdk21u && make jdk
-    displayName: make jdk
-  ## This works only after `make images`
-  # - bash: cd ../jdk21u && build/*/images/jdk/bin/java -version
-  #   displayName: version
-  # - bash: make -C /jdk21u run-test-tier1
-  #   timeoutInMinutes: 0
-  #   displayName: make run-test-tier1
-  # - bash: make -C /jdk21u :test/jdk:tier1
-  ## Temporarily comment out because of trouble finding junit and jasm
-  # - bash: cd ../jdk21u && make run-test TEST="jtreg:test/jdk:tier1"
-  #   timeoutInMinutes: 0
-  #   displayName: make run-test
+  - job: build_jdk21u
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    timeoutInMinutes: 0
+    steps:
+      - bash: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+        displayName: show environment
+      - bash: |
+          set -ex
+          if test -d /tmp/$USER/git-scripts ; \
+            then git -C /tmp/$USER/git-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git ; \
+          fi
+        displayName: git-scripts
+      - bash: |
+          set -ex
+          if test -d /tmp/$USER/plume-scripts ; \
+            then git -C /tmp/$USER/plume-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/plume-scripts.git ; \
+          fi
+        displayName: plume-scripts
+        # This creates ../jdk21u .
+        # Run `git-clone-related` without a limit on depth, because if the depth is
+        # too small, the merge will fail.  Don't use "--filter=blob:none" because that
+        # leads to "fatal: remote error:  filter 'combine' not supported".
+      - bash: |
+          set -ex
+          echo "pwd = $(pwd)"
+          if test -d ../jdk21u; then
+            echo "../jdk21u should not exist yet"
+            false
+          fi
+          df .
+          /tmp/$USER/git-scripts/git-clone-related typetools jdk21u ../jdk21u --single-branch
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u
+          git diff --exit-code
+          echo $?
+        displayName: clone-related-jdk21u
+      - bash: |
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+        displayName: git merge plan
+      - bash: |
+          set -ex
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global pull.ff true
+          git config --global pull.rebase false
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+          cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
+        displayName: git merge
+      - bash: cd ../jdk21u && export JT_HOME=/usr/share/jtreg && bash ./configure --with-jtreg --disable-warnings-as-errors
+        displayName: configure
+      - bash: cd ../jdk21u && make jdk
+        displayName: make jdk
+        ## This works only after `make images`
+        # - bash: cd ../jdk21u && build/*/images/jdk/bin/java -version
+        #   displayName: version
+        # - bash: make -C /jdk21u run-test-tier1
+        #   timeoutInMinutes: 0
+        #   displayName: make run-test-tier1
+        # - bash: make -C /jdk21u :test/jdk:tier1
+        ## Temporarily comment out because of trouble finding junit and jasm
+        # - bash: cd ../jdk21u && make run-test TEST="jtreg:test/jdk:tier1"
+        #   timeoutInMinutes: 0
+        #   displayName: make run-test
 
 cftests_job(junit, cftests-junit, 17)
 cftests_job(nonjunit, cftests-nonjunit, 17)
diff --git a/.azure/defs.m4 b/.azure/defs.m4
index 1d651873c282..0653a1c78481 100644
--- a/.azure/defs.m4
+++ b/.azure/defs.m4
@@ -12,20 +12,20 @@ ifelse([uncomment the next line to use the "testing" Docker images])dnl
 ifelse([define([docker_testing], [-testing])])dnl
 dnl
 define([cftests_job], [dnl
-- job: cftests_$1_jdk$3
-  timeoutInMinutes: 120
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk$3:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-$2.sh)
-    displayName: test-$2.sh])dnl
+  - job: cftests_$1_jdk$3
+    timeoutInMinutes: 120
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk$3:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-$2.sh)
+        displayName: test-$2.sh])dnl
 dnl
 define([junit_job], [dnl
   - job: junit_jdk$1
@@ -150,35 +150,35 @@ ifelse($1,canary_version,[dnl
         displayName: test-typecheck.sh])])dnl
 dnl
 define([daikon_job], [dnl
-- job: test_daikon_part$1
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  timeoutInMinutes: 70
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part$1.sh)
-    displayName: test-daikon-part$1.sh])dnl
+  - job: test_daikon_part$1
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    timeoutInMinutes: 70
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part$1.sh)
+        displayName: test-daikon-part$1.sh])dnl
 dnl
 define([plume_lib_job], [dnl
-- job: test_plume_lib
-  pool:
-    vmImage: 'ubuntu-latest'
-  container: mdernst/cf-ubuntu-jdk17:latest
-  steps:
-  - checkout: self
-    fetchDepth: 25
-  - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
-    displayName: clone git-scripts
-  - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
-    displayName: clone checker-framework
-  - bash: (cd ../checker-framework && checker/bin-devel/test-plume-lib.sh)
-    displayName: test-plume-lib.sh])dnl
+  - job: test_plume_lib
+    pool:
+      vmImage: 'ubuntu-latest'
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - checkout: self
+        fetchDepth: 25
+      - bash: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+        displayName: clone git-scripts
+      - bash: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+        displayName: clone checker-framework
+      - bash: (cd ../checker-framework && checker/bin-devel/test-plume-lib.sh)
+        displayName: test-plume-lib.sh])dnl
 ifelse([
 Local Variables:
 eval: (add-hook 'after-save-hook '(lambda () (run-command nil "make")) nil 'local)

From 8fd7a26529f8b1b5dbc78d94c9021b84adb3b0ff Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 12 Apr 2026 09:32:17 -0700
Subject: [PATCH 052/119] Add canary job

---
 .azure/azure-pipelines.yml    | 40 +++++++++++++++++++++++++++++++++++
 .azure/azure-pipelines.yml.m4 | 10 +++++++++
 .azure/defs.m4                | 23 ++++++++++++++------
 3 files changed, 67 insertions(+), 6 deletions(-)

diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
index 0e32505f2461..faf84061d065 100644
--- a/.azure/azure-pipelines.yml
+++ b/.azure/azure-pipelines.yml
@@ -113,7 +113,19 @@ jobs:
         #   timeoutInMinutes: 0
         #   displayName: make run-test
 
+  - job: canary_jobs
+    dependsOn:
+      - build_jdk
+      - build_jdk21u
+    pool:
+      vmImage: 'ubuntu-latest'
+    steps:
+      - bash: true
+        displayName: canary_jobs
+
   - job: cftests_junit_jdk17
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -128,6 +140,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
         displayName: test-cftests-junit.sh
   - job: cftests_nonjunit_jdk17
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -142,6 +156,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
         displayName: test-cftests-nonjunit.sh
   - job: cftests_typecheck_jdk17
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -156,6 +172,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
         displayName: test-typecheck.sh
   - job: cftests_junit_jdk21
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -170,6 +188,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
         displayName: test-cftests-junit.sh
   - job: cftests_nonjunit_jdk21
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -184,6 +204,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
         displayName: test-cftests-nonjunit.sh
   - job: cftests_inference_jdk21
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -198,6 +220,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
         displayName: test-cftests-inference.sh
   - job: cftests_typecheck_jdk21
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -212,6 +236,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
         displayName: test-typecheck.sh
   - job: cftests_junit_jdk25
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -226,6 +252,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
         displayName: test-cftests-junit.sh
   - job: cftests_nonjunit_jdk25
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -240,6 +268,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
         displayName: test-cftests-nonjunit.sh
   - job: cftests_inference_jdk25
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -254,6 +284,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
         displayName: test-cftests-inference.sh
   - job: cftests_typecheck_jdk25
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -269,6 +301,8 @@ jobs:
         displayName: test-typecheck.sh
 
   - job: test_daikon_part1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest
@@ -283,6 +317,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part1.sh)
         displayName: test-daikon-part1.sh
   - job: test_daikon_part2
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest
@@ -297,6 +333,8 @@ jobs:
       - bash: (cd ../checker-framework && checker/bin-devel/test-daikon-part2.sh)
         displayName: test-daikon-part2.sh
   - job: test_daikon_part3
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest
@@ -312,6 +350,8 @@ jobs:
         displayName: test-daikon-part3.sh
 
   - job: test_plume_lib
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest
diff --git a/.azure/azure-pipelines.yml.m4 b/.azure/azure-pipelines.yml.m4
index c152a8c5e538..8dd5ec8fca13 100644
--- a/.azure/azure-pipelines.yml.m4
+++ b/.azure/azure-pipelines.yml.m4
@@ -116,6 +116,16 @@ jobs:
         #   timeoutInMinutes: 0
         #   displayName: make run-test
 
+  - job: canary_jobs
+    dependsOn:
+      - build_jdk
+      - build_jdk21u
+    pool:
+      vmImage: 'ubuntu-latest'
+    steps:
+      - bash: true
+        displayName: canary_jobs
+
 cftests_job(junit, cftests-junit, 17)
 cftests_job(nonjunit, cftests-nonjunit, 17)
 cftests_job(typecheck, typecheck, 17)
diff --git a/.azure/defs.m4 b/.azure/defs.m4
index 0653a1c78481..e3cbeef84b90 100644
--- a/.azure/defs.m4
+++ b/.azure/defs.m4
@@ -7,12 +7,15 @@ define([canary_os], [ubuntu])dnl
 define([canary_version], [25])dnl
 define([latest_version], [25])dnl
 define([canary_test], [canary_os[]canary_version])dnl
+define([jdku_version], [21u])dnl
 define([docker_testing], [])dnl
 ifelse([uncomment the next line to use the "testing" Docker images])dnl
 ifelse([define([docker_testing], [-testing])])dnl
 dnl
 define([cftests_job], [dnl
   - job: cftests_$1_jdk$3
+    dependsOn:
+      - canary_jobs
     timeoutInMinutes: 120
     pool:
       vmImage: 'ubuntu-latest'
@@ -29,9 +32,9 @@ define([cftests_job], [dnl
 dnl
 define([junit_job], [dnl
   - job: junit_jdk$1
-ifelse($1,canary_version,,[    dependsOn:
+    dependsOn:
       - canary_jobs
-      - junit_jdk[]canary_version
+ifelse($1,canary_version,,[      - junit_jdk[]canary_version
 ])dnl
     pool:
       vmImage: 'ubuntu-latest'
@@ -45,9 +48,9 @@ ifelse($1,canary_version,,[    dependsOn:
 dnl
 define([nonjunit_job], [dnl
   - job: nonjunit_jdk$1
-ifelse($1,canary_version,,[    dependsOn:
+    dependsOn:
       - canary_jobs
-      - nonjunit_jdk[]canary_version
+ifelse($1,canary_version,,[      - nonjunit_jdk[]canary_version
 ])dnl
     pool:
       vmImage: 'ubuntu-latest'
@@ -62,6 +65,8 @@ define([inference_job], [dnl
 ifelse($1,canary_version,[dnl
   # Split into part1 and part2 only for the inference job that "canary_jobs" depends on.
   - job: inference_part1_jdk$1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk$1[]docker_testing:latest
@@ -101,9 +106,9 @@ ifelse($1,canary_version,[dnl
 dnl
 define([misc_job], [dnl
   - job: misc_jdk$1
-ifelse($1,canary_version,,$1,latest_version,,[    dependsOn:
+    dependsOn:
       - canary_jobs
-      - misc_jdk[]canary_version
+ifelse($1,canary_version,,$1,latest_version,,[      - misc_jdk[]canary_version
 ])dnl
     pool:
       vmImage: 'ubuntu-latest'
@@ -118,6 +123,8 @@ dnl
 define([typecheck_job], [dnl
 ifelse($1,canary_version,[dnl
   - job: typecheck_part1_jdk$1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk$1[]docker_testing:latest
@@ -151,6 +158,8 @@ ifelse($1,canary_version,[dnl
 dnl
 define([daikon_job], [dnl
   - job: test_daikon_part$1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest
@@ -167,6 +176,8 @@ define([daikon_job], [dnl
 dnl
 define([plume_lib_job], [dnl
   - job: test_plume_lib
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk17:latest

From 6ee41a6c1d91c7e17976b5033f36c824c89b4b5e Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 12 Apr 2026 12:20:36 -0700
Subject: [PATCH 053/119] Add missing dependency

---
 .azure/defs.m4 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.azure/defs.m4 b/.azure/defs.m4
index e3cbeef84b90..345d4ed21584 100644
--- a/.azure/defs.m4
+++ b/.azure/defs.m4
@@ -7,7 +7,6 @@ define([canary_os], [ubuntu])dnl
 define([canary_version], [25])dnl
 define([latest_version], [25])dnl
 define([canary_test], [canary_os[]canary_version])dnl
-define([jdku_version], [21u])dnl
 define([docker_testing], [])dnl
 ifelse([uncomment the next line to use the "testing" Docker images])dnl
 ifelse([define([docker_testing], [-testing])])dnl
@@ -77,6 +76,8 @@ ifelse($1,canary_version,[dnl
       - bash: export ORG_GRADLE_PROJECT_jdkTestVersion=$1 && ./checker/bin-devel/test-cftests-inference-part1.sh
         displayName: test-cftests-inference-part1.sh
   - job: inference_part2_jdk$1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk$1[]docker_testing:latest
@@ -134,6 +135,8 @@ ifelse($1,canary_version,[dnl
       - bash: export ORG_GRADLE_PROJECT_jdkTestVersion=$1 && ./checker/bin-devel/test-typecheck-part1.sh
         displayName: test-typecheck-part1.sh
   - job: typecheck_part2_jdk$1
+    dependsOn:
+      - canary_jobs
     pool:
       vmImage: 'ubuntu-latest'
     container: mdernst/cf-ubuntu-jdk$1[]docker_testing:latest

From 441b6c7e5819e958342b93aa731d4bb181d964a9 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 12 Apr 2026 12:26:12 -0700
Subject: [PATCH 054/119] Add import

---
 .../share/classes/javax/swing/DefaultListModel.java             | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/java.desktop/share/classes/javax/swing/DefaultListModel.java b/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
index d75de937e94b..059d0463d2d7 100644
--- a/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
+++ b/src/java.desktop/share/classes/javax/swing/DefaultListModel.java
@@ -25,6 +25,8 @@
 
 package javax.swing;
 
+import org.checkerframework.dataflow.qual.SideEffectFree;
+
 import java.util.Vector;
 import java.util.Collection;
 import java.util.Enumeration;

From e6567855928677404cdd84626966738106591eed Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 12 Apr 2026 20:42:49 -0700
Subject: [PATCH 055/119] annotated stack.java which extends vector

---
 src/java.base/share/classes/java/util/Stack.java | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 4a960c5b90db..50ec5dfa7ae1 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -27,6 +27,9 @@
 
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -57,12 +60,12 @@
  * @since   1.0
  */
 @CFComment({"lock/nullness: permit null elements"})
-@AnnotatedFor({"lock", "nullness"})
+@AnnotatedFor({"lock", "nullness", "modifiability"})
 public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public Stack() {
+    public @Modifiable Stack() {
     }
 
     /**
@@ -75,7 +78,7 @@ public Stack() {
      * @return  the {@code item} argument.
      * @see     java.util.Vector#addElement
      */
-    public E push(@GuardSatisfied Stack<E> this, E item) {
+    public E push(@Growable @GuardSatisfied Stack<E> this, E item) {
         addElement(item);
 
         return item;
@@ -89,7 +92,7 @@ public E push(@GuardSatisfied Stack<E> this, E item) {
      *          of the {@code Vector} object).
      * @throws  EmptyStackException  if this stack is empty.
      */
-    public synchronized E pop(@GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {
+    public synchronized E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {
         E       obj;
         int     len = size();
 

From d559eb50362a7a7f789bcee3b8fe5d93f953de7a Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Tue, 14 Apr 2026 08:19:08 -0700
Subject: [PATCH 056/119] Fix line continuation character

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 281d04e81396..42f7f7bb1ee7 100644
--- a/README.md
+++ b/README.md
@@ -158,7 +158,7 @@ merge conflicts.)
 ```sh
 cd jdk21u
 git pull && \
-git pull ../jdk && /
+git pull ../jdk && \
 git pull https://github.com/openjdk/jdk21u.git && \
 git pull https://github.com/typetools/jdk.git
 ```

From 11790824c37f8510fa01112ff38b4a49d817cb82 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Fri, 17 Apr 2026 17:55:33 -0700
Subject: [PATCH 057/119] annotated keyset, values, and entryset to return
 @Ungrowable set.

---
 .../share/classes/java/util/AbstractMap.java        |  7 ++++---
 src/java.base/share/classes/java/util/EnumMap.java  |  7 ++++---
 src/java.base/share/classes/java/util/HashMap.java  |  7 ++++---
 .../share/classes/java/util/Hashtable.java          |  7 ++++---
 .../share/classes/java/util/IdentityHashMap.java    |  7 ++++---
 .../share/classes/java/util/LinkedHashMap.java      | 13 +++++++------
 src/java.base/share/classes/java/util/Map.java      |  7 ++++---
 .../share/classes/java/util/NavigableMap.java       |  5 +++--
 .../share/classes/java/util/SequencedMap.java       |  7 ++++---
 .../share/classes/java/util/SortedMap.java          |  7 ++++---
 src/java.base/share/classes/java/util/TreeMap.java  | 11 ++++++-----
 .../share/classes/java/util/WeakHashMap.java        |  7 ++++---
 .../java/util/concurrent/ConcurrentHashMap.java     |  5 +++--
 .../util/concurrent/ConcurrentNavigableMap.java     |  7 ++++---
 .../java/util/concurrent/ConcurrentSkipListMap.java | 11 ++++++-----
 15 files changed, 65 insertions(+), 50 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 38364b4bc078..d0b073222596 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.Replaceale;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
@@ -384,7 +385,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -451,7 +452,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -502,7 +503,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    public abstract @PolyShrink Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
+    public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index b02d5e6e6c13..720f97c248d1 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -412,7 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
-    public @PolyShrink Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -455,7 +456,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
-    public @PolyShrink Collection<V> values(@PolyShrink EnumMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -505,7 +506,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 103af8a27a01..fb7df44c8e74 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -945,7 +946,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1079,7 +1080,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1143,7 +1144,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index aecededa6607..77bb0cc22b24 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -696,7 +697,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -741,7 +742,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -826,7 +827,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 1a48ce607ba1..90975ff87cdd 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1021,7 +1022,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1135,7 +1136,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1250,7 +1251,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 34f72f2b77d2..3ee2dddd18d7 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -649,7 +650,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -662,7 +663,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink SequencedSet<K> sequencedKeySet(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink LinkedHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             SequencedSet<K> sks = new LinkedKeySet(false);
@@ -803,7 +804,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    public @PolyShrink Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -816,7 +817,7 @@ public SequencedSet<K> reversed() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink SequencedCollection<V> sequencedValues(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink LinkedHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             SequencedCollection<V> svs = new LinkedValues(false);
@@ -914,7 +915,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -927,7 +928,7 @@ public SequencedCollection<V> reversed() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable LinkedHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable LinkedHashMap<K, V> this) {
         Set<Map.Entry<K, V>> es = entrySet;
         if (es == null) {
             SequencedSet<Map.Entry<K, V>> ses = new LinkedEntrySet(false);
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 1600c0c611e1..5e6dde92c14a 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -36,6 +36,7 @@
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -397,7 +398,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -415,7 +416,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -434,7 +435,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @PolyShrink @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index e110fe69db53..3fa57771f062 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -298,7 +299,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @PolyShrink NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
+    @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -315,7 +316,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @PolyShrink NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
+    @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index 8a1f25ebc733..f1f35d6b4a7c 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 
 /**
@@ -278,7 +279,7 @@ default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
      *
      * @return a {@code SequencedSet} view of this map's {@code keySet}
      */
-    default @PolyShrink SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {
+    default @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {
         class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
             Collection<K> view() {
                 return SequencedMap.this.keySet();
@@ -311,7 +312,7 @@ public int hashCode() {
      *
      * @return a {@code SequencedCollection} view of this map's {@code values} collection
      */
-    default @PolyShrink SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {
+    default @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {
         class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
             Collection<V> view() {
                 return SequencedMap.this.values();
@@ -337,7 +338,7 @@ public SequencedCollection<V> reversed() {
      *
      * @return a {@code SequencedSet} view of this map's {@code entrySet}
      */
-    default @PolyShrink SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
+    default @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
         class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
                 implements SequencedSet<Map.Entry<K, V>> {
             Collection<Map.Entry<K, V>> view() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 4958e5a52acf..a162f0c20047 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -262,7 +263,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -283,7 +284,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -304,7 +305,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
+    @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index bea1bdc2742a..89bd8b10036b 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1159,7 +1160,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.  It does not support the {@code add} or {@code addAll}
      * operations.
      */
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1167,7 +1168,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyShrink NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1176,7 +1177,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @PolyShrink NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1201,7 +1202,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1233,7 +1234,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 8f17e4c9a8c8..abd070660b78 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -909,7 +910,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    public @PolyShrink Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -968,7 +969,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1019,7 +1020,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 1affce11f660..fcc9193aeac0 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -40,6 +40,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1293,7 +1294,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    public @PolyShrink Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1317,7 +1318,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index cd3d406c2bfd..cdcd39810ac5 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
 import java.util.NavigableMap;
@@ -145,7 +146,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @PolyShrink NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -165,7 +166,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    @PolyShrink NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -184,5 +185,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @PolyShrink NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 8397bc488ab4..34ebceb73b5b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1639,14 +1640,14 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    public @PolyShrink NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    public @PolyShrink NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1671,7 +1672,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    public @PolyShrink Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1705,7 +1706,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public @PolyShrink Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1720,7 +1721,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    public @PolyShrink NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 

From 10a022c836154fc87c6f707cec67ae1517cfca7d Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Tue, 21 Apr 2026 23:04:15 -0700
Subject: [PATCH 058/119] add ci.yml in .github

---
 .github/workflows/ci.yml | 373 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 373 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000000..5e2e551a76e0
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,373 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build_jdk:
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: show environment
+        run: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+      - name: configure
+        run: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
+      - name: make jdk
+        timeout-minutes: 90
+        run: make jdk
+
+  build_jdk21u:
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21-plus:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: show environment
+        run: |
+          whoami
+          git config --get remote.origin.url
+          pwd
+          ls -al
+          env | sort
+      - name: git-scripts
+        run: |
+          set -ex
+          if test -d /tmp/$USER/git-scripts ; \
+            then git -C /tmp/$USER/git-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git ; \
+          fi
+      - name: plume-scripts
+        run: |
+          set -ex
+          if test -d /tmp/$USER/plume-scripts ; \
+            then git -C /tmp/$USER/plume-scripts pull -q > /dev/null 2>&1 ; \
+            else mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/plume-scripts.git ; \
+          fi
+      - name: clone-related-jdk21u
+        run: |
+          set -ex
+          echo "pwd = $(pwd)"
+          if test -d ../jdk21u; then
+            echo "../jdk21u should not exist yet"
+            false
+          fi
+          df .
+          /tmp/$USER/git-scripts/git-clone-related typetools jdk21u ../jdk21u --single-branch
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u
+          git diff --exit-code
+          echo $?
+      - name: git merge plan
+        run: |
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+      - name: git merge
+        run: |
+          set -ex
+          git config --global user.email "you@example.com"
+          git config --global user.name "Your Name"
+          git config --global pull.ff true
+          git config --global pull.rebase false
+          git config --global core.longpaths true
+          git config --global core.protectNTFS false
+          cd ../jdk21u && git status
+          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          set
+          echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
+          cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
+      - name: configure
+        run: cd ../jdk21u && export JT_HOME=/usr/share/jtreg && bash ./configure --with-jtreg --disable-warnings-as-errors
+      - name: make jdk
+        run: cd ../jdk21u && make jdk
+
+  canary_jobs:
+    needs:
+      - build_jdk
+      - build_jdk21u
+    runs-on: ubuntu-latest
+    steps:
+      - name: canary_jobs
+        run: true
+
+  cftests_junit_jdk17:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-junit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+
+  cftests_nonjunit_jdk17:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-nonjunit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+
+  cftests_typecheck_jdk17:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-typecheck.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+
+  cftests_junit_jdk21:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-junit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+
+  cftests_nonjunit_jdk21:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-nonjunit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+
+  cftests_inference_jdk21:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-inference.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
+
+  cftests_typecheck_jdk21:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk21:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-typecheck.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+
+  cftests_junit_jdk25:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-junit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-junit.sh)
+
+  cftests_nonjunit_jdk25:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-nonjunit.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-nonjunit.sh)
+
+  cftests_inference_jdk25:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-cftests-inference.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-cftests-inference.sh)
+
+  cftests_typecheck_jdk25:
+    needs:
+      - canary_jobs
+    timeout-minutes: 120
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk25:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-typecheck.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-typecheck.sh)
+
+  test_daikon_part1:
+    needs:
+      - canary_jobs
+    timeout-minutes: 70
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-daikon-part1.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-daikon-part1.sh)
+
+  test_daikon_part2:
+    needs:
+      - canary_jobs
+    timeout-minutes: 70
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-daikon-part2.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-daikon-part2.sh)
+
+  test_daikon_part3:
+    needs:
+      - canary_jobs
+    timeout-minutes: 70
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-daikon-part3.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-daikon-part3.sh)
+
+  test_plume_lib:
+    needs:
+      - canary_jobs
+    runs-on: ubuntu-latest
+    container: mdernst/cf-ubuntu-jdk17:latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 25
+      - name: clone git-scripts
+        run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
+      - name: clone checker-framework
+        run: /tmp/$USER/git-scripts/git-clone-related typetools checker-framework
+      - name: test-plume-lib.sh
+        run: (cd ../checker-framework && checker/bin-devel/test-plume-lib.sh)

From f533200a1c09a913199b3197fd42d3fb76d6a9d0 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Tue, 21 Apr 2026 23:16:04 -0700
Subject: [PATCH 059/119] update ci.yml: make run steps execute in bash without
 -e

---
 .github/workflows/ci.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e2e551a76e0..9edbcd9d155b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,10 @@ on:
   pull_request:
   workflow_dispatch:
 
+defaults:
+  run:
+    shell: bash --noprofile --norc {0}
+
 jobs:
   build_jdk:
     runs-on: ubuntu-latest

From 56399df942b372c891458a51965567898478e076 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 22 Apr 2026 00:17:27 -0700
Subject: [PATCH 060/119] synced checker-qual.jar

---
 checker-qual.jar                              | Bin 286009 -> 289340 bytes
 .../modifiability/qual/BottomGrow.java        |  21 +++++++++++++
 .../modifiability/qual/BottomReplace.java     |  21 +++++++++++++
 .../modifiability/qual/BottomShrink.java      |  21 +++++++++++++
 .../modifiability/qual/Ungrowable.java        |  22 +++++++++++++
 .../modifiability/qual/UnknownGrow.java       |   4 +--
 .../qual/UnknownModifiability.java            |   3 +-
 .../modifiability/qual/UnknownReplace.java    |   6 ++--
 .../modifiability/qual/UnknownShrink.java     |   6 ++--
 .../modifiability/qual/Unmodifiable.java      |   6 ++--
 .../modifiability/qual/Unreplaceable.java     |  22 +++++++++++++
 .../modifiability/qual/Unshrinkable.java      |  22 +++++++++++++
 .../dataflow/qual/SideEffectsOnly.java        |  29 ------------------
 .../qual/DoesNotUnrefineReceiver.java         |   2 +-
 14 files changed, 142 insertions(+), 43 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
 delete mode 100644 src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
 rename src/java.base/share/classes/org/checkerframework/{dataflow => framework}/qual/DoesNotUnrefineReceiver.java (96%)

diff --git a/checker-qual.jar b/checker-qual.jar
index 8c13f44b86d88603313b832898f97b0f711bba7d..811cd283e7085f1b8a9a1754055e7c19f0a7affd 100644
GIT binary patch
delta 11100
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z-!pX12`<}oCvbSc0^XQ-Cqb&Ahc57i#K;*ek$)L}w7dysQtAw)ss2j~qd(5DfQFy5
zUE%O@fo`G~Y-S<W^^y&QQT|7`dRcF=oc<ZpmU}%-^{OA*_H+>>5%p#oZRrXpr3H#`
zhBwz)SGXE8d!|{H-QX-~dygXAab>i{4V*<j5I~K*oZh)X@<A*{7wNdel~f3iYj=DZ
zHV*G<LRLNkN5OA*aC`&rYJ&0dfI$=nN$_9{6DQui>ewxKBok&uPuv8)frWz$iv0si
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zgC8Je5j_l&bqN4(?Kvd<PXH|IJ{1DYMXmFou&f)F8VH&iby8y+2-l{L4oVHgqp@fD
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z5C&d(J_LxyxB^L;&SIETb1(_kL_uX)9UF_D(XrG}QlPaQ1U%tz@d%>AFkA%%hr_|&
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oXBYh3j3)eZk`$PnqX~(7xNvY1>${#>PmR7vq12SZPjr<30ZBOYf&c&j

diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java
new file mode 100644
index 000000000000..a01b989a8664
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java
@@ -0,0 +1,21 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The bottom qualifier in the Grow hierarchy.
+ *
+ * <p>Programmers should rarely write this qualifier.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({Growable.class, Ungrowable.class})
+public @interface BottomGrow {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java
new file mode 100644
index 000000000000..a2609e3558de
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java
@@ -0,0 +1,21 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The bottom qualifier in the Replace hierarchy.
+ *
+ * <p>Programmers should rarely write this qualifier.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({Replaceable.class, Unreplaceable.class})
+public @interface BottomReplace {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java
new file mode 100644
index 000000000000..3cf5d6902f6e
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java
@@ -0,0 +1,21 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The bottom qualifier in the Shrink hierarchy.
+ *
+ * <p>Programmers should rarely write this qualifier.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({Shrinkable.class, Unshrinkable.class})
+public @interface BottomShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
new file mode 100644
index 000000000000..24348a29d853
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling grow operations such as {@code add}, {@code addAll}, etc. on this collection will throw
+ * {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about shrink or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownGrow.class)
+public @interface Ungrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
index 30f3c460deec..c71e04417b1c 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
@@ -9,8 +9,8 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Grow hierarchy. Represents an unknown or absent grow capability. The
- * checker cannot determine whether the collection supports grow operations such as {@code add}.
+ * The top qualifier in the Grow hierarchy. Represents unknown grow capability. The checker cannot
+ * determine whether the collection supports grow operations such as {@code add}.
  *
  * <p>This is the default qualifier for unannotated types in the Grow hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
index f653f09d2d03..502805c4a134 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
@@ -12,8 +12,7 @@
  * collection is growable, shrinkable, or replaceable.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type. It is equivalent to
- * {@link Unmodifiable}.
+ * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
index a793d64f521f..164002371c5b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
@@ -9,9 +9,9 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Replace hierarchy. Represents an unknown or absent replace capability.
- * The checker cannot determine whether the collection supports replace operations such as {@code
- * set} or {@code replaceAll}.
+ * The top qualifier in the Replace hierarchy. Represents unknown replace capability. The checker
+ * cannot determine whether the collection supports replace operations such as {@code set} or {@code
+ * replaceAll}.
  *
  * <p>This is the default qualifier for unannotated types in the Replace hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
index 7f87345b521c..68f5918995e3 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
@@ -9,9 +9,9 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Shrink hierarchy. Represents an unknown or absent shrink capability. The
- * checker cannot determine whether the collection supports shrink operations such as {@code remove}
- * or {@code clear}.
+ * The top qualifier in the Shrink hierarchy. Represents unknown shrink capability. The checker
+ * cannot determine whether the collection supports shrink operations such as {@code remove} or
+ * {@code clear}.
  *
  * <p>This is the default qualifier for unannotated types in the Shrink hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index f5252ff71572..f8d2c6fdc043 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -7,12 +7,12 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @UnknownGrow @UnknownShrink @UnknownReplace}. Calling any
- * mutating operation on this collection (growing, shrinking, or replacing) will throw {@link
+ * Convenience alias meaning {@code @Ungrowable @Unshrinkable @Unreplaceable}. Calling any mutating
+ * operation on this collection (growing, shrinking, or replacing) will throw {@link
  * UnsupportedOperationException}.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type.
+ * {@code @Ungrowable @Unshrinkable @Unreplaceable} on each annotated type.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
new file mode 100644
index 000000000000..1f58bc15625f
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling replace operations such as {@code set}, {@code replaceAll}, etc. on this collection will
+ * throw {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about grow or shrink operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownReplace.class)
+public @interface Unreplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
new file mode 100644
index 000000000000..1b97e46abbdf
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
@@ -0,0 +1,22 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling shrink operations such as {@code remove}, {@code clear}, etc. on this collection will
+ * throw {@link UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about grow or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownShrink.class)
+public @interface Unshrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
deleted file mode 100644
index ab6a7dd1718f..000000000000
--- a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectsOnly.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package org.checkerframework.dataflow.qual;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-import org.checkerframework.framework.qual.JavaExpression;
-
-/**
- * A method annotated with the declaration annotation {@code @SideEffectsOnly("A", "B")} changes the
- * value of at most the expressions A and B. All other expressions have the same value before and
- * after a call to the method.
- *
- * @checker_framework.manual #type-refinement-purity Specifying side effects
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
-public @interface SideEffectsOnly {
-  /**
-   * An upper bound on the expressions that this method might change the value of.
-   *
-   * @return the Java expressions that the annotated method might side-effect
-   * @checker_framework.manual #java-expressions-as-arguments Syntax of Java expressions
-   */
-  @JavaExpression
-  public String[] value();
-}
diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java b/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java
rename to src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
index 329ea505d64e..4eca89c86484 100644
--- a/src/java.base/share/classes/org/checkerframework/dataflow/qual/DoesNotUnrefineReceiver.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
@@ -1,4 +1,4 @@
-package org.checkerframework.dataflow.qual;
+package org.checkerframework.framework.qual;
 
 import java.lang.annotation.Documented;
 import java.lang.annotation.ElementType;

From 7bf97d8a4f7dabb21b5495a9de9e30ad924b10e6 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 22 Apr 2026 23:12:35 -0700
Subject: [PATCH 061/119] spot that list.java's iterator is not annotated as
 unknown.

---
 src/java.base/share/classes/java/util/List.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 7c7e1df2c2af..69bc34830f43 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -217,7 +217,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @UnknownModifiability @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @UnknownModifiability @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper

From b176554e8d174b8504dcfbd501fcf016f616eb3c Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Thu, 23 Apr 2026 00:28:55 -0700
Subject: [PATCH 062/119] annotate iteratorPreserveRemove for the test. TODO:
 need to annotate rest of the files.

---
 src/java.base/share/classes/java/util/ArrayList.java | 9 +++++----
 src/java.base/share/classes/java/util/Map.java       | 2 ++
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index e9fe34602084..829e7c63a7f4 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -182,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -197,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable ArrayList() {
+    public @Modifiable @IteratorPreserveRemove ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -210,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -384,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable Object clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPreserveRemove clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 9efe1f486962..781c02862ed6 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -403,6 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove 
     @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**

From d65f3f3ddbc97ec464e84545245e544df5634560 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 26 Apr 2026 16:09:01 -0700
Subject: [PATCH 063/119] annotate modifiable collections as
 @IteratorPreserveRemove

---
 .../share/classes/java/util/ArrayDeque.java   |  9 +++---
 .../share/classes/java/util/Collections.java  |  3 +-
 .../share/classes/java/util/EnumSet.java      | 29 ++++++++++---------
 .../share/classes/java/util/HashSet.java      | 13 +++++----
 .../classes/java/util/LinkedHashSet.java      |  9 +++---
 .../share/classes/java/util/LinkedList.java   |  7 +++--
 .../classes/java/util/PriorityQueue.java      | 15 +++++-----
 .../share/classes/java/util/Stack.java        |  3 +-
 .../share/classes/java/util/TreeSet.java      | 13 +++++----
 .../share/classes/java/util/Vector.java       | 11 +++----
 .../util/concurrent/ArrayBlockingQueue.java   |  7 +++--
 .../concurrent/ConcurrentLinkedDeque.java     |  5 ++--
 .../concurrent/ConcurrentLinkedQueue.java     |  5 ++--
 .../concurrent/ConcurrentSkipListSet.java     | 13 +++++----
 .../java/util/concurrent/DelayQueue.java      |  5 ++--
 .../util/concurrent/LinkedBlockingDeque.java  |  7 +++--
 .../util/concurrent/LinkedBlockingQueue.java  |  7 +++--
 .../util/concurrent/LinkedTransferQueue.java  |  5 ++--
 .../concurrent/PriorityBlockingQueue.java     |  9 +++---
 19 files changed, 97 insertions(+), 78 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 2974f1335515..616554b6e772 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -202,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable ArrayDeque() {
+    public @Modifiable @IteratorPreserveRemove ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -212,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPreserveRemove ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -229,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1213,7 +1214,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPreserveRemove ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 59a382201b91..099fee1f16b8 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -6046,7 +6047,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPreserveRemove ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index 24ea615d8451..761acfa910e4 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -103,7 +104,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPreserveRemove EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -117,7 +118,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -138,7 +139,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -160,7 +161,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return A copy of the specified enum set.
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -178,7 +179,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      *     {@code EnumSet} instance and contains no elements
      * @throws NullPointerException if {@code c} is null
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -203,7 +204,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -223,7 +224,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code e} is null
      * @return an enum set initially containing the specified element
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -244,7 +245,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -267,7 +268,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -292,7 +293,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -319,7 +320,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -346,7 +347,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SafeVarargs
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -368,7 +369,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -390,7 +391,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Modifiable EnumSet<E> clone() {
+    public @Modifiable @IteratorPreserveRemove EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 41244751b32c..804349d0145a 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -125,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable HashSet() {
+    public @Modifiable @IteratorPreserveRemove HashSet() {
         map = new HashMap<>();
     }
 
@@ -138,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -156,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPreserveRemove HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -172,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -189,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPreserveRemove HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -293,7 +294,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 285bff113405..a219082e353c 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
@@ -153,7 +154,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPreserveRemove LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -169,7 +170,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -177,7 +178,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable LinkedHashSet() {
+    public @Modifiable @IteratorPreserveRemove LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -191,7 +192,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index a45acc91c49a..7ba240f48d4d 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -143,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable LinkedList() {
+    public @Modifiable @IteratorPreserveRemove LinkedList() {
     }
 
     /**
@@ -154,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1112,7 +1113,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index 02625197edd7..d84639887ea5 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -151,7 +152,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable PriorityQueue() {
+    public @Modifiable @IteratorPreserveRemove PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -164,7 +165,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -177,7 +178,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreserveRemove PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -192,7 +193,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPreserveRemove PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -218,7 +219,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -249,7 +250,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -267,7 +268,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index cb8f7bc2ba34..940b998423cb 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -66,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable Stack() {
+    public @Modifiable @IteratorPreserveRemove Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 0ac28bf313b3..800004a81ea6 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -130,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPreserveRemove TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -147,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable TreeSet() {
+    public @Modifiable @IteratorPreserveRemove TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -164,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreserveRemove TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -182,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -194,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -552,7 +553,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 35c7c7f61bd9..fa37254351e2 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -166,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPreserveRemove Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -183,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -192,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable Vector() {
+    public @Modifiable @IteratorPreserveRemove Vector() {
         this(10);
     }
 
@@ -206,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -711,7 +712,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 6d1e38280473..bc10c9fd5533 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -275,7 +276,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -289,7 +290,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -314,7 +315,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 7fce4bc51a8c..f65e9560dc63 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -792,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -805,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 1e289de70597..4b5d59529fa1 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -277,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index a458a08cdcd2..90eadcce94c4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -143,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -158,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -171,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -179,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -190,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 6369edd3dc28..0ce07e873618 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,6 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -153,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable DelayQueue() {}
+    public @Modifiable @IteratorPreserveRemove DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -163,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 2e4550f519d6..6291ac7f502b 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -193,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable LinkedBlockingDeque() {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -203,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -218,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 8bde84325e0a..1c12b86d4a96 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -263,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable LinkedBlockingQueue() {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -274,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -290,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 9304865e8a33..4c33b12262bd 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1178,7 +1179,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable LinkedTransferQueue() {
+    public @Modifiable @IteratorPreserveRemove LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1191,7 +1192,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index d5a76c5bec0b..69604ad38ec6 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -209,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable PriorityBlockingQueue() {
+    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -222,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -238,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -262,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {

From 046a3c5418e5a2871749e5c1ddc588d35a9ce456 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 26 Apr 2026 18:08:02 -0700
Subject: [PATCH 064/119] annotated @IteratorPreserveRemove on maps.

---
 .../share/classes/java/util/AbstractMap.java         |  4 ++++
 .../share/classes/java/util/Collections.java         | 12 ++++++++++++
 src/java.base/share/classes/java/util/EnumMap.java   |  4 ++++
 src/java.base/share/classes/java/util/HashMap.java   |  4 ++++
 src/java.base/share/classes/java/util/Hashtable.java |  4 ++++
 .../share/classes/java/util/IdentityHashMap.java     |  4 ++++
 .../share/classes/java/util/LinkedHashMap.java       |  7 +++++++
 src/java.base/share/classes/java/util/Map.java       |  4 +++-
 .../share/classes/java/util/NavigableMap.java        |  3 +++
 .../share/classes/java/util/Properties.java          |  4 ++++
 .../classes/java/util/ReverseOrderSortedMapView.java |  5 +++++
 src/java.base/share/classes/java/util/SortedMap.java |  4 ++++
 src/java.base/share/classes/java/util/TreeMap.java   | 11 +++++++++++
 .../share/classes/java/util/WeakHashMap.java         |  4 ++++
 .../java/util/concurrent/ConcurrentHashMap.java      |  5 +++++
 .../java/util/concurrent/ConcurrentNavigableMap.java |  4 ++++
 .../java/util/concurrent/ConcurrentSkipListMap.java  | 11 +++++++++++
 17 files changed, 93 insertions(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index ac29a3ab4ae9..abbd7b2922a7 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -390,6 +391,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -460,6 +462,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
@@ -513,6 +516,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
+    @IteratorPreserveRemove
     public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 099fee1f16b8..78e9f95add2d 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -3087,6 +3087,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
+        @IteratorPreserveRemove
         public Set<K> keySet() {
             synchronized (mutex) {
                 if (keySet==null)
@@ -3096,6 +3097,7 @@ public Set<K> keySet() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public Set<Map.Entry<K,V>> entrySet() {
             synchronized (mutex) {
                 if (entrySet==null)
@@ -3104,6 +3106,7 @@ public Set<Map.Entry<K,V>> entrySet() {
             }
         }
 
+        @IteratorPreserveRemove
         public Collection<V> values() {
             synchronized (mutex) {
                 if (values==null)
@@ -3394,11 +3397,13 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
+        @IteratorPreserveRemove
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> navigableKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
@@ -3406,6 +3411,7 @@ public NavigableSet<K> navigableKeySet() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> descendingKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
@@ -4185,7 +4191,9 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
+        @IteratorPreserveRemove
         public Set<K> keySet()                 { return m.keySet(); }
+        @IteratorPreserveRemove
         public Collection<V> values()          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
@@ -4221,6 +4229,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public Set<Map.Entry<K,V>> entrySet() {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
@@ -4713,16 +4722,19 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
+        @IteratorPreserveRemove
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> navigableKeySet() {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> descendingKeySet() {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 1f12bbf8bc5c..f1cc403c2afe 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -412,6 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -455,6 +457,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -505,6 +508,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 915416c8ec96..c846de0f75c8 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -952,6 +953,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1090,6 +1092,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1156,6 +1159,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 0826e420ef32..e3df68657e66 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -702,6 +703,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
@@ -749,6 +751,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
@@ -837,6 +840,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 9ab5b1b4720d..47129249851e 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1034,6 +1035,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1150,6 +1152,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1266,6 +1269,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 50a4a6df451f..9aae22805d9d 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -654,6 +655,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
@@ -814,6 +816,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
@@ -929,6 +932,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
@@ -1228,14 +1232,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
+        @IteratorPreserveRemove
         public Set<K> keySet() {
             return base.sequencedKeySet().reversed();
         }
 
+        @IteratorPreserveRemove
         public Collection<V> values() {
             return base.sequencedValues().reversed();
         }
 
+        @IteratorPreserveRemove
         public Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 781c02862ed6..05ed47b066be 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove 
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -423,6 +423,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -442,6 +443,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 183924b1e891..634b7143a113 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,6 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -312,6 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
@@ -329,6 +331,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 4ac828027799..44c546a6ef1a 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -1394,17 +1395,20 @@ public synchronized String toString() {
     }
 
     @Override
+    @IteratorPreserveRemove
     public Set<@KeyFor("this") Object> keySet() {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
+    @IteratorPreserveRemove
     public Collection<Object> values() {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
+    @IteratorPreserveRemove
     public Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 8e750326b3c7..a685669ef57a 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,6 +25,7 @@
 
 package java.util;
 
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.dataflow.qual.Pure;
 
 /**
@@ -97,6 +98,7 @@ public int size() {
         return base.size();
     }
 
+    @IteratorPreserveRemove
     public Set<K> keySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -108,6 +110,7 @@ public Set<K> keySet() {
         };
     }
 
+    @IteratorPreserveRemove
     public Collection<V> values() {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
@@ -119,6 +122,7 @@ public Collection<V> values() {
         };
     }
 
+    @IteratorPreserveRemove
     public Set<Entry<K, V>> entrySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -394,6 +398,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
+        @IteratorPreserveRemove
         public Set<Entry<K, V>> entrySet() {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 5f34c3171645..57c90ba45952 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -264,6 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -285,6 +287,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -306,6 +309,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 5b0e549c2e23..938635a35c7d 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1189,6 +1190,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @DoesNotUnrefineReceiver("modifiability")
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
@@ -1197,6 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
@@ -1206,6 +1209,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -1231,6 +1235,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1263,6 +1268,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
@@ -2053,17 +2059,20 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public final NavigableSet<K> navigableKeySet() {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
+        @IteratorPreserveRemove
         public final Set<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
@@ -2390,6 +2399,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
@@ -2483,6 +2493,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index b36dff80f000..d3119f5c9850 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,6 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -921,6 +922,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -982,6 +984,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1034,6 +1037,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 503622e6f060..19b02cc3d875 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1279,6 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public KeySetView<@KeyFor({"this"}) K,V> keySet() {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1304,6 +1306,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1328,6 +1331,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -2283,6 +2287,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @return the set view
      * @throws NullPointerException if the mappedValue is null
      */
+    @IteratorPreserveRemove
     public KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index cdcd39810ac5..47a4cd6a338e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -36,6 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -146,6 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -166,6 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -185,5 +188,6 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 927b0c2a45f0..187dd76a4495 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,6 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1649,6 +1650,7 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1656,6 +1658,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1681,6 +1684,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1715,6 +1719,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -1730,6 +1735,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
+    @IteratorPreserveRemove
     public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -3010,6 +3016,7 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
+        @IteratorPreserveRemove
         public NavigableSet<K> keySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
@@ -3017,12 +3024,14 @@ public NavigableSet<K> keySet() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> navigableKeySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
+        @IteratorPreserveRemove
         public Collection<V> values() {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
@@ -3030,6 +3039,7 @@ public Collection<V> values() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
@@ -3037,6 +3047,7 @@ public Set<Map.Entry<K,V>> entrySet() {
         }
 
         @SideEffectFree
+        @IteratorPreserveRemove
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }

From dea0a375ecfbf3c29afd88c66bd546f68d44f73e Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 29 Apr 2026 12:51:00 -0700
Subject: [PATCH 065/119] changed annoations to IteratorPreservesRemove

---
 .../share/classes/java/util/AbstractMap.java  |  8 ++---
 .../share/classes/java/util/ArrayDeque.java   | 10 +++----
 .../share/classes/java/util/ArrayList.java    | 10 +++----
 .../share/classes/java/util/Collections.java  | 28 ++++++++---------
 .../share/classes/java/util/EnumMap.java      |  8 ++---
 .../share/classes/java/util/EnumSet.java      | 30 +++++++++----------
 .../share/classes/java/util/HashMap.java      |  8 ++---
 .../share/classes/java/util/HashSet.java      | 14 ++++-----
 .../share/classes/java/util/Hashtable.java    |  8 ++---
 .../classes/java/util/IdentityHashMap.java    |  8 ++---
 .../classes/java/util/LinkedHashMap.java      | 14 ++++-----
 .../classes/java/util/LinkedHashSet.java      | 10 +++----
 .../share/classes/java/util/LinkedList.java   |  8 ++---
 .../share/classes/java/util/Map.java          |  8 ++---
 .../share/classes/java/util/NavigableMap.java |  6 ++--
 .../classes/java/util/PriorityQueue.java      | 16 +++++-----
 .../share/classes/java/util/Properties.java   |  8 ++---
 .../java/util/ReverseOrderSortedMapView.java  | 10 +++----
 .../share/classes/java/util/SortedMap.java    |  8 ++---
 .../share/classes/java/util/Stack.java        |  4 +--
 .../share/classes/java/util/TreeMap.java      | 22 +++++++-------
 .../share/classes/java/util/TreeSet.java      | 14 ++++-----
 .../share/classes/java/util/Vector.java       | 12 ++++----
 .../share/classes/java/util/WeakHashMap.java  |  8 ++---
 .../util/concurrent/ArrayBlockingQueue.java   |  8 ++---
 .../util/concurrent/ConcurrentHashMap.java    | 10 +++----
 .../concurrent/ConcurrentLinkedDeque.java     |  6 ++--
 .../concurrent/ConcurrentLinkedQueue.java     |  6 ++--
 .../concurrent/ConcurrentNavigableMap.java    |  8 ++---
 .../concurrent/ConcurrentSkipListMap.java     | 22 +++++++-------
 .../concurrent/ConcurrentSkipListSet.java     | 14 ++++-----
 .../java/util/concurrent/DelayQueue.java      |  6 ++--
 .../util/concurrent/LinkedBlockingDeque.java  |  8 ++---
 .../util/concurrent/LinkedBlockingQueue.java  |  8 ++---
 .../util/concurrent/LinkedTransferQueue.java  |  6 ++--
 .../concurrent/PriorityBlockingQueue.java     | 10 +++----
 36 files changed, 196 insertions(+), 196 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index abbd7b2922a7..8ff874821963 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -391,7 +391,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -462,7 +462,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
@@ -516,7 +516,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 616554b6e772..8ad2bb07f65c 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -203,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable @IteratorPreserveRemove ArrayDeque() {
+    public @Modifiable @IteratorPreservesRemove ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -213,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable @IteratorPreserveRemove ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPreservesRemove ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -230,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1214,7 +1214,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPreservesRemove ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 829e7c63a7f4..b46df72d0b8e 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -183,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -198,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove ArrayList() {
+    public @Modifiable @IteratorPreservesRemove ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -211,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPreservesRemove clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 78e9f95add2d..b4d7af5e642f 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -3087,7 +3087,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<K> keySet() {
             synchronized (mutex) {
                 if (keySet==null)
@@ -3097,7 +3097,7 @@ public Set<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Map.Entry<K,V>> entrySet() {
             synchronized (mutex) {
                 if (entrySet==null)
@@ -3106,7 +3106,7 @@ public Set<Map.Entry<K,V>> entrySet() {
             }
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Collection<V> values() {
             synchronized (mutex) {
                 if (values==null)
@@ -3397,13 +3397,13 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> navigableKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
@@ -3411,7 +3411,7 @@ public NavigableSet<K> navigableKeySet() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> descendingKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
@@ -4191,9 +4191,9 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<K> keySet()                 { return m.keySet(); }
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Collection<V> values()          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
@@ -4229,7 +4229,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Map.Entry<K,V>> entrySet() {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
@@ -4722,19 +4722,19 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> navigableKeySet() {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> descendingKeySet() {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
@@ -6059,7 +6059,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable @IteratorPreserveRemove ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPreservesRemove ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index f1cc403c2afe..18776e7b887b 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -413,7 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -457,7 +457,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -508,7 +508,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index 761acfa910e4..a2f1e91bff50 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -104,7 +104,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable @IteratorPreserveRemove EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPreservesRemove EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -118,7 +118,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -139,7 +139,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -161,7 +161,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return A copy of the specified enum set.
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -179,7 +179,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      *     {@code EnumSet} instance and contains no elements
      * @throws NullPointerException if {@code c} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -204,7 +204,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -224,7 +224,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code e} is null
      * @return an enum set initially containing the specified element
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -245,7 +245,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -268,7 +268,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -293,7 +293,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -320,7 +320,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -347,7 +347,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SafeVarargs
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -369,7 +369,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreserveRemove EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -391,7 +391,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Modifiable @IteratorPreserveRemove EnumSet<E> clone() {
+    public @Modifiable @IteratorPreservesRemove EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index c846de0f75c8..3cc84e08d357 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -953,7 +953,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1092,7 +1092,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1159,7 +1159,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 804349d0145a..c0c2351a3ea9 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -126,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPreserveRemove HashSet() {
+    public @Modifiable @IteratorPreservesRemove HashSet() {
         map = new HashMap<>();
     }
 
@@ -139,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -157,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPreserveRemove HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPreservesRemove HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -173,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable @IteratorPreserveRemove HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -190,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable @IteratorPreserveRemove HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPreservesRemove HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -294,7 +294,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index e3df68657e66..22fe89b652b4 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -703,7 +703,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
@@ -751,7 +751,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
@@ -840,7 +840,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 47129249851e..55c482d9f6ba 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1035,7 +1035,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1152,7 +1152,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1269,7 +1269,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 9aae22805d9d..a40c2b422b6e 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -655,7 +655,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
@@ -816,7 +816,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
@@ -932,7 +932,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
@@ -1232,17 +1232,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<K> keySet() {
             return base.sequencedKeySet().reversed();
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Collection<V> values() {
             return base.sequencedValues().reversed();
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index a219082e353c..5a63bb93dac3 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
@@ -154,7 +154,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPreserveRemove LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPreservesRemove LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -170,7 +170,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable @IteratorPreserveRemove LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -178,7 +178,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPreserveRemove LinkedHashSet() {
+    public @Modifiable @IteratorPreservesRemove LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -192,7 +192,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreserveRemove LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 7ba240f48d4d..3900c58d8984 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -144,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable @IteratorPreserveRemove LinkedList() {
+    public @Modifiable @IteratorPreservesRemove LinkedList() {
     }
 
     /**
@@ -155,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1113,7 +1113,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 05ed47b066be..10cbe9518145 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -423,7 +423,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -443,7 +443,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 634b7143a113..ae81ad847d46 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
@@ -331,7 +331,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index d84639887ea5..7c5dd80649c1 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -152,7 +152,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue() {
+    public @Modifiable @IteratorPreservesRemove PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -165,7 +165,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -178,7 +178,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreservesRemove PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -193,7 +193,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPreservesRemove PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -219,7 +219,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -250,7 +250,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -268,7 +268,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 44c546a6ef1a..bbbf861a973f 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -1395,20 +1395,20 @@ public synchronized String toString() {
     }
 
     @Override
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Set<@KeyFor("this") Object> keySet() {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Collection<Object> values() {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index a685669ef57a..442d1b279529 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,7 +25,7 @@
 
 package java.util;
 
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.dataflow.qual.Pure;
 
 /**
@@ -98,7 +98,7 @@ public int size() {
         return base.size();
     }
 
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Set<K> keySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -110,7 +110,7 @@ public Set<K> keySet() {
         };
     }
 
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Collection<V> values() {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
@@ -122,7 +122,7 @@ public Collection<V> values() {
         };
     }
 
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public Set<Entry<K, V>> entrySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -398,7 +398,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Entry<K, V>> entrySet() {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 57c90ba45952..c12b7899224d 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -287,7 +287,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -309,7 +309,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 940b998423cb..30f26e82df35 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -67,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable @IteratorPreserveRemove Stack() {
+    public @Modifiable @IteratorPreservesRemove Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 938635a35c7d..bfc0691ef3cb 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1190,7 +1190,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @DoesNotUnrefineReceiver("modifiability")
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
@@ -1199,7 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
@@ -1209,7 +1209,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -1235,7 +1235,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1268,7 +1268,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
@@ -2059,20 +2059,20 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public final NavigableSet<K> navigableKeySet() {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public final Set<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
@@ -2399,7 +2399,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
@@ -2493,7 +2493,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 800004a81ea6..acf9d6945e74 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPreserveRemove TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPreservesRemove TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -148,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPreserveRemove TreeSet() {
+    public @Modifiable @IteratorPreservesRemove TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPreserveRemove TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreservesRemove TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -553,7 +553,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index fa37254351e2..136923ca3c34 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -167,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPreserveRemove Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPreservesRemove Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -184,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPreserveRemove Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -193,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable @IteratorPreserveRemove Vector() {
+    public @Modifiable @IteratorPreservesRemove Vector() {
         this(10);
     }
 
@@ -207,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @IteratorPreserveRemove @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -712,7 +712,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable @IteratorPreserveRemove Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index d3119f5c9850..39c48997667d 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -922,7 +922,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -984,7 +984,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1037,7 +1037,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index bc10c9fd5533..9f2f6c0b370e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -276,7 +276,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -290,7 +290,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -315,7 +315,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 19b02cc3d875..a7a5fd755fd5 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1280,7 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public KeySetView<@KeyFor({"this"}) K,V> keySet() {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1306,7 +1306,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1331,7 +1331,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -2287,7 +2287,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @return the set view
      * @throws NullPointerException if the mappedValue is null
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index f65e9560dc63..37494772d50f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -793,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -806,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 4b5d59529fa1..43e6e57de2d4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -265,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -278,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index 47a4cd6a338e..c0dbdc03365b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -188,6 +188,6 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 187dd76a4495..ea3ea601d713 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1650,7 +1650,7 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1658,7 +1658,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1684,7 +1684,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1719,7 +1719,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -1735,7 +1735,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPreserveRemove
+    @IteratorPreservesRemove
     public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -3016,7 +3016,7 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> keySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
@@ -3024,14 +3024,14 @@ public NavigableSet<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> navigableKeySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Collection<V> values() {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
@@ -3039,7 +3039,7 @@ public Collection<V> values() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
@@ -3047,7 +3047,7 @@ public Set<Map.Entry<K,V>> entrySet() {
         }
 
         @SideEffectFree
-        @IteratorPreserveRemove
+        @IteratorPreservesRemove
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 90eadcce94c4..34b92aa3558e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -132,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreserveRemove ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 0ce07e873618..32be820f1a5f 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -154,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPreserveRemove DelayQueue() {}
+    public @Modifiable @IteratorPreservesRemove DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -164,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 6291ac7f502b..93938b94b644 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -194,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque() {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -204,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -219,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 1c12b86d4a96..4e9feb1b770c 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue() {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -275,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -291,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 4c33b12262bd..6b851777c853 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1179,7 +1179,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable @IteratorPreserveRemove LinkedTransferQueue() {
+    public @Modifiable @IteratorPreservesRemove LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1192,7 +1192,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index 69604ad38ec6..d84edb46b233 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreserveRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -210,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue() {
+    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -223,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -239,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -263,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreserveRemove PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {

From 071ffcde7f1181d02ca4f370902937ac537d5309 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 29 Apr 2026 15:37:18 -0700
Subject: [PATCH 066/119] revise javadoc for @Modifiable and @Unmodifiable.

Co-authored-by: Copilot <copilot@github.com>
---
 .../checker/modifiability/qual/Modifiable.java             | 7 +++++++
 .../checker/modifiability/qual/Unmodifiable.java           | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index 97d492135de4..caa15121e762 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -13,6 +13,13 @@
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
  * {@code @Growable @Shrinkable @Replaceable} on each annotated type.
+ * 
+ * <p>Some Java types lack methods for certain kinds of mutation. For these types, the Modifiability Checker defaults
+ * them to {@code @Unknown}:
+ * <ul> {@code @Modifiable Iterator<>} is treated as {@code @UnknownGrow @Shrinkable @UnknownReplace Iterator}. </ul>
+ * <ul> {@code @Modifiable Set<>} is treated as {@code @Growable @Shrinkable @UnknownReplace Set}. </ul>
+ * <ul> {@code @Modifiable Queue<>} is treated as {@code @Growable @Shrinkable @UnknownReplace Queue}. </ul>
+ * <ul> {@code Map.@Modifiable Entry<>} is treated as {@code @UnknownGrow @UnknownShrink @Replaceable List}. </ul>
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index f8d2c6fdc043..69aadab79673 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -13,6 +13,13 @@
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
  * {@code @Ungrowable @Unshrinkable @Unreplaceable} on each annotated type.
+ * 
+ * <p>Some Java types lack methods for certain kinds of mutation. For these types, the Modifiability Checker defaults
+ * them to {@code @Unknown}:
+ * <ul> {@code @Unmodifiable Iterator<>} is treated as {@code @UnknownGrow @Unshrinkable @UnknownReplace Iterator}. </ul>
+ * <ul> {@code @Unmodifiable Set<>} is treated as {@code @Ungrowable @Unshrinkable @UnknownReplace Set}. </ul>
+ * <ul> {@code @Unmodifiable Queue<>} is treated as {@code @Ungrowable @Unshrinkable @UnknownReplace Queue}. </ul>
+ * <ul> {@code Map.@Unmodifiable Entry<>} is treated as {@code @UnknownGrow @UnknownShrink @Unreplaceable List}. </ul>
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */

From 0e18efe2cf24c52042b1595f20a916483a3fb505 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 2 May 2026 13:45:21 -0700
Subject: [PATCH 067/119] Rename `IteratorPreservesRemove` to
 `IteratorPolyShrink`

---
 checker-qual.jar                              | Bin 255934 -> 290638 bytes
 .../share/classes/java/util/AbstractMap.java  |   8 ++---
 .../share/classes/java/util/ArrayDeque.java   |  10 +++---
 .../share/classes/java/util/ArrayList.java    |  10 +++---
 .../share/classes/java/util/Collections.java  |  28 ++++++++--------
 .../share/classes/java/util/EnumMap.java      |   8 ++---
 .../share/classes/java/util/EnumSet.java      |  30 +++++++++---------
 .../share/classes/java/util/HashMap.java      |   8 ++---
 .../share/classes/java/util/HashSet.java      |  14 ++++----
 .../share/classes/java/util/Hashtable.java    |   8 ++---
 .../classes/java/util/IdentityHashMap.java    |   8 ++---
 .../classes/java/util/LinkedHashMap.java      |  14 ++++----
 .../classes/java/util/LinkedHashSet.java      |  10 +++---
 .../share/classes/java/util/LinkedList.java   |   8 ++---
 .../share/classes/java/util/Map.java          |   8 ++---
 .../share/classes/java/util/NavigableMap.java |   6 ++--
 .../classes/java/util/PriorityQueue.java      |  16 +++++-----
 .../share/classes/java/util/Properties.java   |   8 ++---
 .../java/util/ReverseOrderSortedMapView.java  |  10 +++---
 .../share/classes/java/util/SortedMap.java    |   8 ++---
 .../share/classes/java/util/Stack.java        |   4 +--
 .../share/classes/java/util/TreeMap.java      |  22 ++++++-------
 .../share/classes/java/util/TreeSet.java      |  14 ++++----
 .../share/classes/java/util/Vector.java       |  12 +++----
 .../share/classes/java/util/WeakHashMap.java  |   8 ++---
 .../util/concurrent/ArrayBlockingQueue.java   |   8 ++---
 .../util/concurrent/ConcurrentHashMap.java    |  10 +++---
 .../concurrent/ConcurrentLinkedDeque.java     |   6 ++--
 .../concurrent/ConcurrentLinkedQueue.java     |   6 ++--
 .../concurrent/ConcurrentNavigableMap.java    |   8 ++---
 .../concurrent/ConcurrentSkipListMap.java     |  22 ++++++-------
 .../concurrent/ConcurrentSkipListSet.java     |  14 ++++----
 .../java/util/concurrent/DelayQueue.java      |   6 ++--
 .../util/concurrent/LinkedBlockingDeque.java  |   8 ++---
 .../util/concurrent/LinkedBlockingQueue.java  |   8 ++---
 .../util/concurrent/LinkedTransferQueue.java  |   6 ++--
 .../concurrent/PriorityBlockingQueue.java     |  10 +++---
 .../checker/index/qual/IndexOrHigh.java       |   7 +++-
 .../qual/IteratorPolyShrink.java              |  23 ++++++++++++++
 .../modifiability/qual/Modifiable.java        |  18 ++++-------
 .../modifiability/qual/PolyModifiable.java    |  14 ++++----
 .../checker/modifiability/qual/ThrowsUOE.java |   3 +-
 .../qual/UnknownIteratorPolyShrink.java       |  24 ++++++++++++++
 .../modifiability/qual/Unmodifiable.java      |  16 +++-------
 .../common/aliasing/qual/NonLeaked.java       |   2 +-
 .../qual/DoesNotUnrefineReceiver.java         |   3 +-
 .../qual/PreconditionAnnotation.java          |   2 +-
 47 files changed, 270 insertions(+), 234 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java

diff --git a/checker-qual.jar b/checker-qual.jar
index 041b4630e0bba72458e50ca5160922c7c943206b..2307f392bb16d457f805a0aa1f5a9a1ed67d0f90 100644
GIT binary patch
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zFv|l*6hwSBSS{$BN1Gv=0(9lU)U1H=ESiGj!TudU9X`zb;WH}(wknDv?jug`X>qI%
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zhQhP~RcBMv6ib_+T1z4|sW;BJ+V|LmTB6Z_!y~_MyP4ofE7jecmtWAV9?U}3oBt|+
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zu%w}ns|jDEr_fSORqY#A&F%yU6#e4`sa8r0Vb6ujf*`LNT{Rj=>?{LAqDSh2d^Dwq
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s_Jl!hLcO^pOMRNsBVZ%AG^O{i0d(UgsL_9<^hhbIgvDxs_HD5K2d11tfB*mh

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 8ff874821963..b60eb45c9ab4 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -391,7 +391,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -462,7 +462,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
@@ -516,7 +516,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 8ad2bb07f65c..41ebc64a4546 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -203,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable @IteratorPreservesRemove ArrayDeque() {
+    public @Modifiable @IteratorPolyShrink ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -213,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable @IteratorPreservesRemove ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPolyShrink ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -230,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1214,7 +1214,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPolyShrink ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index b46df72d0b8e..8700715258e0 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -183,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -198,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove ArrayList() {
+    public @Modifiable @IteratorPolyShrink ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -211,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPolyShrink clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index b4d7af5e642f..2c5f9817593f 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -3087,7 +3087,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<K> keySet() {
             synchronized (mutex) {
                 if (keySet==null)
@@ -3097,7 +3097,7 @@ public Set<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Map.Entry<K,V>> entrySet() {
             synchronized (mutex) {
                 if (entrySet==null)
@@ -3106,7 +3106,7 @@ public Set<Map.Entry<K,V>> entrySet() {
             }
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Collection<V> values() {
             synchronized (mutex) {
                 if (values==null)
@@ -3397,13 +3397,13 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> navigableKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
@@ -3411,7 +3411,7 @@ public NavigableSet<K> navigableKeySet() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> descendingKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
@@ -4191,9 +4191,9 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<K> keySet()                 { return m.keySet(); }
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Collection<V> values()          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
@@ -4229,7 +4229,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Map.Entry<K,V>> entrySet() {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
@@ -4722,19 +4722,19 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> navigableKeySet() {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> descendingKeySet() {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
@@ -6059,7 +6059,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable @IteratorPreservesRemove ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPolyShrink ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 18776e7b887b..47338e12beb1 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -413,7 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -457,7 +457,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -508,7 +508,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index a2f1e91bff50..a506f75b72ca 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -104,7 +104,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable @IteratorPreservesRemove EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPolyShrink EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -118,7 +118,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -139,7 +139,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -161,7 +161,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return A copy of the specified enum set.
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -179,7 +179,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      *     {@code EnumSet} instance and contains no elements
      * @throws NullPointerException if {@code c} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -204,7 +204,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -224,7 +224,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code e} is null
      * @return an enum set initially containing the specified element
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -245,7 +245,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -268,7 +268,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -293,7 +293,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -320,7 +320,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -347,7 +347,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SafeVarargs
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -369,7 +369,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPreservesRemove EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -391,7 +391,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Modifiable @IteratorPreservesRemove EnumSet<E> clone() {
+    public @Modifiable @IteratorPolyShrink EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 3cc84e08d357..5844a7ac800b 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -953,7 +953,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1092,7 +1092,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1159,7 +1159,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index c0c2351a3ea9..7be9d3d37a41 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -126,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPreservesRemove HashSet() {
+    public @Modifiable @IteratorPolyShrink HashSet() {
         map = new HashMap<>();
     }
 
@@ -139,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -157,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPreservesRemove HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyShrink HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -173,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable @IteratorPreservesRemove HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -190,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable @IteratorPreservesRemove HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPolyShrink HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -294,7 +294,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 22fe89b652b4..03538b97454b 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -703,7 +703,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
@@ -751,7 +751,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
@@ -840,7 +840,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 55c482d9f6ba..d60fdf0a4b6c 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1035,7 +1035,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1152,7 +1152,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1269,7 +1269,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index a40c2b422b6e..5f9952db62aa 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -655,7 +655,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
@@ -816,7 +816,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
@@ -932,7 +932,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
@@ -1232,17 +1232,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<K> keySet() {
             return base.sequencedKeySet().reversed();
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Collection<V> values() {
             return base.sequencedValues().reversed();
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 5a63bb93dac3..725fdabd7880 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
@@ -154,7 +154,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPreservesRemove LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyShrink LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -170,7 +170,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable @IteratorPreservesRemove LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -178,7 +178,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPreservesRemove LinkedHashSet() {
+    public @Modifiable @IteratorPolyShrink LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -192,7 +192,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreservesRemove LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 3900c58d8984..57fc993eec14 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -144,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable @IteratorPreservesRemove LinkedList() {
+    public @Modifiable @IteratorPolyShrink LinkedList() {
     }
 
     /**
@@ -155,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1113,7 +1113,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 10cbe9518145..0c2f1f039d3c 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -423,7 +423,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -443,7 +443,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index ae81ad847d46..b5bbcf9c16a9 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
@@ -331,7 +331,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index 7c5dd80649c1..71957f343a2c 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -152,7 +152,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue() {
+    public @Modifiable @IteratorPolyShrink PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -165,7 +165,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -178,7 +178,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrink PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -193,7 +193,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPolyShrink PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -219,7 +219,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -250,7 +250,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -268,7 +268,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index bbbf861a973f..c43ca8edbd40 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -1395,20 +1395,20 @@ public synchronized String toString() {
     }
 
     @Override
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Set<@KeyFor("this") Object> keySet() {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Collection<Object> values() {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 442d1b279529..504a43e984a8 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,7 +25,7 @@
 
 package java.util;
 
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.dataflow.qual.Pure;
 
 /**
@@ -98,7 +98,7 @@ public int size() {
         return base.size();
     }
 
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Set<K> keySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -110,7 +110,7 @@ public Set<K> keySet() {
         };
     }
 
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Collection<V> values() {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
@@ -122,7 +122,7 @@ public Collection<V> values() {
         };
     }
 
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public Set<Entry<K, V>> entrySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -398,7 +398,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Entry<K, V>> entrySet() {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index c12b7899224d..1b3bba1cdbd5 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -287,7 +287,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -309,7 +309,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 30f26e82df35..02db44159d67 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -67,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable @IteratorPreservesRemove Stack() {
+    public @Modifiable @IteratorPolyShrink Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index bfc0691ef3cb..07690bc38ed1 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1190,7 +1190,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @DoesNotUnrefineReceiver("modifiability")
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
@@ -1199,7 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
@@ -1209,7 +1209,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -1235,7 +1235,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1268,7 +1268,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
@@ -2059,20 +2059,20 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public final NavigableSet<K> navigableKeySet() {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public final Set<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
@@ -2399,7 +2399,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
@@ -2493,7 +2493,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index acf9d6945e74..ef75d358475c 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPreservesRemove TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyShrink TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -148,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPreservesRemove TreeSet() {
+    public @Modifiable @IteratorPolyShrink TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPreservesRemove TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrink TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -553,7 +553,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 136923ca3c34..3c1b26f31194 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -167,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPreservesRemove Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPolyShrink Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -184,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPreservesRemove Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -193,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable @IteratorPreservesRemove Vector() {
+    public @Modifiable @IteratorPolyShrink Vector() {
         this(10);
     }
 
@@ -207,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @IteratorPreservesRemove @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -712,7 +712,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable @IteratorPreservesRemove Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 39c48997667d..71da4ded8434 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -922,7 +922,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -984,7 +984,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1037,7 +1037,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 9f2f6c0b370e..8b3ec37eb656 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -276,7 +276,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -290,7 +290,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -315,7 +315,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index a7a5fd755fd5..7616cc460089 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1280,7 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public KeySetView<@KeyFor({"this"}) K,V> keySet() {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1306,7 +1306,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1331,7 +1331,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -2287,7 +2287,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @return the set view
      * @throws NullPointerException if the mappedValue is null
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 37494772d50f..f7c3ccf7e476 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -793,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPolyShrink ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -806,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 43e6e57de2d4..a424fe252d47 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -265,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPolyShrink ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -278,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index c0dbdc03365b..c4cb851d62b7 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -188,6 +188,6 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index ea3ea601d713..0058e4e7a7e4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1650,7 +1650,7 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1658,7 +1658,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1684,7 +1684,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1719,7 +1719,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -1735,7 +1735,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPreservesRemove
+    @IteratorPolyShrink
     public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -3016,7 +3016,7 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> keySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
@@ -3024,14 +3024,14 @@ public NavigableSet<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> navigableKeySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Collection<V> values() {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
@@ -3039,7 +3039,7 @@ public Collection<V> values() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
@@ -3047,7 +3047,7 @@ public Set<Map.Entry<K,V>> entrySet() {
         }
 
         @SideEffectFree
-        @IteratorPreservesRemove
+        @IteratorPolyShrink
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 34b92aa3558e..0fb0ff395c85 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -132,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPreservesRemove ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 32be820f1a5f..b91d904b7fc1 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -154,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPreservesRemove DelayQueue() {}
+    public @Modifiable @IteratorPolyShrink DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -164,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 93938b94b644..c1c73012e080 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -194,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque() {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -204,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -219,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 4e9feb1b770c..4983400e1ab9 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue() {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -275,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -291,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 6b851777c853..fa885e110bec 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1179,7 +1179,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable @IteratorPreservesRemove LinkedTransferQueue() {
+    public @Modifiable @IteratorPolyShrink LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1192,7 +1192,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index d84edb46b233..9cdf7500b254 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPreservesRemove;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -210,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue() {
+    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -223,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -239,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -263,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPreservesRemove PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
index 11990235099e..3fecd1d288b1 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/IndexOrHigh.java
@@ -33,6 +33,11 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 public @interface IndexOrHigh {
-  /** The annotated expression is a valid index for, or is equal to the length of, each sequence. */
+  /**
+   * The annotated expression is a valid index for, or is equal to the length of, each sequence.
+   *
+   * @return sequences that the annotated expression is a valid index for or is equal to the length
+   *     of
+   */
   String[] value();
 }
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java
new file mode 100644
index 000000000000..164a8f8d1308
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * If a collection's type is {@code @IteratorPolyShrink}, then its {@code iterator()} method
+ * preserves the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has
+ * type {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
+ * collection whose type is {@code @UnknownIteratorPolyShrink}, its iterator is always
+ * {@code @Unshrinkable}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(UnknownIteratorPolyShrink.class)
+public @interface IteratorPolyShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index caa15121e762..537f47bfada7 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -7,19 +7,13 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @Growable @Shrinkable @Replaceable}. Calling grow, shrink, and
- * replace operations such as {@code add}, {@code remove}, {@code set}, etc. on this collection will
- * not result in throwing {@link UnsupportedOperationException}.
+ * Convenience alias usually meaning {@code @Growable @Shrinkable @Replaceable}. Calling a mutating
+ * operation (growing, shrinking, or replacing) on this collection will not result in throwing
+ * {@link UnsupportedOperationException}.
  *
- * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @Growable @Shrinkable @Replaceable} on each annotated type.
- * 
- * <p>Some Java types lack methods for certain kinds of mutation. For these types, the Modifiability Checker defaults
- * them to {@code @Unknown}:
- * <ul> {@code @Modifiable Iterator<>} is treated as {@code @UnknownGrow @Shrinkable @UnknownReplace Iterator}. </ul>
- * <ul> {@code @Modifiable Set<>} is treated as {@code @Growable @Shrinkable @UnknownReplace Set}. </ul>
- * <ul> {@code @Modifiable Queue<>} is treated as {@code @Growable @Shrinkable @UnknownReplace Queue}. </ul>
- * <ul> {@code Map.@Modifiable Entry<>} is treated as {@code @UnknownGrow @UnknownShrink @Replaceable List}. </ul>
+ * <p>As an exception, {@code @Modifiable} means {@code @Unknown*} if the type does not support a
+ * given category of operation; for example, {@Modifiable Iterator} means
+ * {@code @UnknownGrow @UnknownShrink @Replaceable Iterator}.)
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 73bc67261eb3..87345ae94317 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -4,14 +4,11 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @PolyGrow @PolyShrink @PolyReplace}. A polymorphic qualifier for
+ * Convenience alias meaning {@code @PolyGrow @PolyReplace @PolyShrink}. A polymorphic qualifier for
  * all three modifiability hierarchies.
  *
- * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @PolyGrow @PolyShrink @PolyReplace} on each annotated type.
- *
- * <p>Use on methods that preserve or transfer modifiability &mdash; for example, {@code
- * List.subList()}, {@code iterator()}, or {@code stream()}.
+ * <p>You should write {@code @PolyModifiable} on methods that preserve or transfer modifiability,
+ * such as {@code List.subList()}, {@code iterator()}, and {@code stream()}.
  *
  * <p>For example:
  *
@@ -21,8 +18,9 @@
  * }
  * </code></pre>
  *
- * If the receiver is {@code @Unmodifiable}, the return is {@code @Unmodifiable}. If the receiver is
- * {@code @Modifiable}, the return is {@code @Modifiable}.
+ * If the receiver type at a given call site is {@code @Unmodifiable}, the return type at that call
+ * site {@code @Unmodifiable}. If the receiver type is {@code @Modifiable}, the return type is
+ * {@code @Modifiable}. Likewise for growing and shrinking type qualifiers.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
index 3651620510c7..1275077f2023 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
@@ -7,8 +7,7 @@
 import java.lang.annotation.Target;
 
 /**
- * Indicates that the annotated method always throws {@link UnsupportedOperationException} when
- * called.
+ * The annotated method always throws {@link UnsupportedOperationException} when called.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java
new file mode 100644
index 000000000000..b74f7b26c438
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java
@@ -0,0 +1,24 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * For the annotated collection, The return type of {@code iterator()} is {@code @Unshrinkable}.
+ *
+ * <p>This is the default qualifier for unannotated types.
+ *
+ * @see #IteratorPolyShrink
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({})
+@DefaultQualifierInHierarchy
+public @interface UnknownIteratorPolyShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index 69aadab79673..56f430ac40ca 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -7,19 +7,13 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @Ungrowable @Unshrinkable @Unreplaceable}. Calling any mutating
- * operation on this collection (growing, shrinking, or replacing) will throw {@link
+ * Convenience alias usually meaning {@code @Ungrowable @Unshrinkable @Unreplaceable}. Calling a
+ * mutating operation (growing, shrinking, or replacing) may throw {@link
  * UnsupportedOperationException}.
  *
- * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @Ungrowable @Unshrinkable @Unreplaceable} on each annotated type.
- * 
- * <p>Some Java types lack methods for certain kinds of mutation. For these types, the Modifiability Checker defaults
- * them to {@code @Unknown}:
- * <ul> {@code @Unmodifiable Iterator<>} is treated as {@code @UnknownGrow @Unshrinkable @UnknownReplace Iterator}. </ul>
- * <ul> {@code @Unmodifiable Set<>} is treated as {@code @Ungrowable @Unshrinkable @UnknownReplace Set}. </ul>
- * <ul> {@code @Unmodifiable Queue<>} is treated as {@code @Ungrowable @Unshrinkable @UnknownReplace Queue}. </ul>
- * <ul> {@code Map.@Unmodifiable Entry<>} is treated as {@code @UnknownGrow @UnknownShrink @Unreplaceable List}. </ul>
+ * <p>As an exception, {@code @Unmodifiable} means {@code @Unknown*} if the type does not support a
+ * given category of operation; for example, {@Unmodifiable Iterator} means
+ * {@code @UnknownGrow @UnknownShrink @Unreplaceable Iterator}.)
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/NonLeaked.java b/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/NonLeaked.java
index ad0b07366d57..5686d79b5b3d 100644
--- a/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/NonLeaked.java
+++ b/src/java.base/share/classes/org/checkerframework/common/aliasing/qual/NonLeaked.java
@@ -21,7 +21,7 @@
  */
 
 // This is a type qualifier because of a Checker Framework limitation (Issue 383), but its hierarchy
-// is ignored. Once the stub parser gets updated to read non-type-qualifiers annotations on stub
+// is ignored. Once the stub parser gets updated to store non-type-qualifier annotations from stub
 // files, this annotation won't be a type qualifier anymore.
 
 @Documented
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java b/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
index 4eca89c86484..33e94710d019 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/DoesNotUnrefineReceiver.java
@@ -15,9 +15,8 @@
  * @checker_framework.manual #type-refinement-purity Side effects, determinism, purity, and
  *     flow-sensitive analysis
  */
-// @InheritedAnnotation cannot be written here, because "dataflow" project cannot depend on
-// "framework" project.
 @Documented
+@InheritedAnnotation
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
 public @interface DoesNotUnrefineReceiver {
diff --git a/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java b/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
index a3ab69c41550..ce2df1af281b 100644
--- a/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
+++ b/src/java.base/share/classes/org/checkerframework/framework/qual/PreconditionAnnotation.java
@@ -43,7 +43,7 @@
  * {@code @MinLen(2)} upon entry.
  *
  * <pre><code>
- *  {@literal @}RequiresMinLen(value = "field", targetValue = 2")
+ *  {@literal @}RequiresMinLen(value = "field", targetValue = 2)
  *  public char getThirdCharacter() {
  *    return field.charAt(2);
  *  }

From 53ba3e4173bbf333deb3aef0b0ebda2db593898d Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sat, 2 May 2026 17:21:49 -0700
Subject: [PATCH 068/119] fixed listIterator annotation

---
 src/java.base/share/classes/java/util/AbstractList.java     | 6 +++---
 .../share/classes/java/util/AbstractSequentialList.java     | 4 ++--
 src/java.base/share/classes/java/util/List.java             | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index ebc730d871f7..6fc9e1f15dc4 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -339,7 +339,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return new Itr();
     }
 
@@ -351,7 +351,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return listIterator(0);
     }
 
@@ -378,7 +378,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 31c5e77a0b6d..8ad691322c4e 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -255,7 +255,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this,
      * @return an iterator over the elements in this list (in proper sequence)
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractSequentialList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
         return listIterator();
     }
 
@@ -269,5 +269,5 @@ public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this,
      *         sequence)
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public abstract @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractSequentialList<E> this, int index);
+    public abstract @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractSequentialList<E> this, int index);
 }
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 69bc34830f43..a15f9314a485 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -739,7 +739,7 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      * @return a list iterator over the elements in this list (in proper
      *         sequence)
      */
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns a list iterator over the elements in this list (in proper
@@ -756,7 +756,7 @@ default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
+    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
 
     // View
 

From 4f7ffddf7e7cbd5144c94594bc26737da15a5fb1 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 3 May 2026 21:18:53 -0700
Subject: [PATCH 069/119] rename IteratorPolyShrink to IteratorPolyMod

---
 .../share/classes/java/util/AbstractMap.java  |  8 ++---
 .../share/classes/java/util/ArrayDeque.java   | 10 +++----
 .../share/classes/java/util/ArrayList.java    | 10 +++----
 .../share/classes/java/util/Collections.java  | 28 ++++++++---------
 .../share/classes/java/util/EnumMap.java      |  8 ++---
 .../share/classes/java/util/EnumSet.java      | 30 +++++++++----------
 .../share/classes/java/util/HashMap.java      |  8 ++---
 .../share/classes/java/util/HashSet.java      | 14 ++++-----
 .../share/classes/java/util/Hashtable.java    |  8 ++---
 .../classes/java/util/IdentityHashMap.java    |  8 ++---
 .../classes/java/util/LinkedHashMap.java      | 14 ++++-----
 .../classes/java/util/LinkedHashSet.java      | 10 +++----
 .../share/classes/java/util/LinkedList.java   |  8 ++---
 .../share/classes/java/util/Map.java          |  8 ++---
 .../share/classes/java/util/NavigableMap.java |  6 ++--
 .../classes/java/util/PriorityQueue.java      | 16 +++++-----
 .../share/classes/java/util/Properties.java   |  8 ++---
 .../java/util/ReverseOrderSortedMapView.java  | 10 +++----
 .../share/classes/java/util/SortedMap.java    |  8 ++---
 .../share/classes/java/util/Stack.java        |  4 +--
 .../share/classes/java/util/TreeMap.java      | 22 +++++++-------
 .../share/classes/java/util/TreeSet.java      | 14 ++++-----
 .../share/classes/java/util/Vector.java       | 12 ++++----
 .../share/classes/java/util/WeakHashMap.java  |  8 ++---
 .../util/concurrent/ArrayBlockingQueue.java   |  8 ++---
 .../util/concurrent/ConcurrentHashMap.java    | 10 +++----
 .../concurrent/ConcurrentLinkedDeque.java     |  6 ++--
 .../concurrent/ConcurrentLinkedQueue.java     |  6 ++--
 .../concurrent/ConcurrentNavigableMap.java    |  8 ++---
 .../concurrent/ConcurrentSkipListMap.java     | 22 +++++++-------
 .../concurrent/ConcurrentSkipListSet.java     | 14 ++++-----
 .../java/util/concurrent/DelayQueue.java      |  6 ++--
 .../util/concurrent/LinkedBlockingDeque.java  |  8 ++---
 .../util/concurrent/LinkedBlockingQueue.java  |  8 ++---
 .../util/concurrent/LinkedTransferQueue.java  |  6 ++--
 .../concurrent/PriorityBlockingQueue.java     | 10 +++----
 36 files changed, 196 insertions(+), 196 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index b60eb45c9ab4..b86bd2ff614f 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -391,7 +391,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -462,7 +462,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
@@ -516,7 +516,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 41ebc64a4546..0a3f9864e14d 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -203,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable @IteratorPolyShrink ArrayDeque() {
+    public @Modifiable @IteratorPolyMod ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -213,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable @IteratorPolyShrink ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPolyMod ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -230,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1214,7 +1214,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPolyMod ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 8700715258e0..4ced6e5c85f1 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -183,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -198,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink ArrayList() {
+    public @Modifiable @IteratorPolyMod ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -211,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPolyMod clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 2c5f9817593f..17e1efdd82c0 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -3087,7 +3087,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<K> keySet() {
             synchronized (mutex) {
                 if (keySet==null)
@@ -3097,7 +3097,7 @@ public Set<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Map.Entry<K,V>> entrySet() {
             synchronized (mutex) {
                 if (entrySet==null)
@@ -3106,7 +3106,7 @@ public Set<Map.Entry<K,V>> entrySet() {
             }
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Collection<V> values() {
             synchronized (mutex) {
                 if (values==null)
@@ -3397,13 +3397,13 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> navigableKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
@@ -3411,7 +3411,7 @@ public NavigableSet<K> navigableKeySet() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> descendingKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
@@ -4191,9 +4191,9 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<K> keySet()                 { return m.keySet(); }
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Collection<V> values()          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
@@ -4229,7 +4229,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Map.Entry<K,V>> entrySet() {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
@@ -4722,19 +4722,19 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> navigableKeySet() {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> descendingKeySet() {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
@@ -6059,7 +6059,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable @IteratorPolyShrink ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPolyMod ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 47338e12beb1..9e6f081bdd5e 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -413,7 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -457,7 +457,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -508,7 +508,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index a506f75b72ca..eaed5d30f237 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -104,7 +104,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable @IteratorPolyShrink EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPolyMod EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -118,7 +118,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -139,7 +139,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -161,7 +161,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return A copy of the specified enum set.
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -179,7 +179,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      *     {@code EnumSet} instance and contains no elements
      * @throws NullPointerException if {@code c} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -204,7 +204,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -224,7 +224,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code e} is null
      * @return an enum set initially containing the specified element
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -245,7 +245,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -268,7 +268,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -293,7 +293,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -320,7 +320,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -347,7 +347,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SafeVarargs
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -369,7 +369,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrink EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -391,7 +391,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Modifiable @IteratorPolyShrink EnumSet<E> clone() {
+    public @Modifiable @IteratorPolyMod EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 5844a7ac800b..f79d9248c75a 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -953,7 +953,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1092,7 +1092,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1159,7 +1159,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 7be9d3d37a41..51241b4ee3a4 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -126,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyShrink HashSet() {
+    public @Modifiable @IteratorPolyMod HashSet() {
         map = new HashMap<>();
     }
 
@@ -139,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -157,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyShrink HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -173,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable @IteratorPolyShrink HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -190,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable @IteratorPolyShrink HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPolyMod HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -294,7 +294,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 03538b97454b..8f7002309c6e 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -703,7 +703,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
@@ -751,7 +751,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
@@ -840,7 +840,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index d60fdf0a4b6c..d4cfc483288e 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1035,7 +1035,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -1152,7 +1152,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1269,7 +1269,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 5f9952db62aa..a20d9dcc73b0 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -655,7 +655,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
@@ -816,7 +816,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
@@ -932,7 +932,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
@@ -1232,17 +1232,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<K> keySet() {
             return base.sequencedKeySet().reversed();
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Collection<V> values() {
             return base.sequencedValues().reversed();
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 725fdabd7880..c592552080f2 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
@@ -154,7 +154,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyShrink LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -170,7 +170,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable @IteratorPolyShrink LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -178,7 +178,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyShrink LinkedHashSet() {
+    public @Modifiable @IteratorPolyMod LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -192,7 +192,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrink LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 57fc993eec14..d2ecaa17bb68 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -144,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable @IteratorPolyShrink LinkedList() {
+    public @Modifiable @IteratorPolyMod LinkedList() {
     }
 
     /**
@@ -155,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1113,7 +1113,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 0c2f1f039d3c..3f421077e00c 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -423,7 +423,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
@@ -443,7 +443,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index b5bbcf9c16a9..f6e1bf285579 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
@@ -331,7 +331,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index 71957f343a2c..3ba09c372fd1 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -152,7 +152,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue() {
+    public @Modifiable @IteratorPolyMod PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -165,7 +165,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -178,7 +178,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -193,7 +193,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -219,7 +219,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -250,7 +250,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -268,7 +268,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index c43ca8edbd40..ddfde6957f6e 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -1395,20 +1395,20 @@ public synchronized String toString() {
     }
 
     @Override
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Set<@KeyFor("this") Object> keySet() {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Collection<Object> values() {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 504a43e984a8..65d942e22c4a 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,7 +25,7 @@
 
 package java.util;
 
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.dataflow.qual.Pure;
 
 /**
@@ -98,7 +98,7 @@ public int size() {
         return base.size();
     }
 
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Set<K> keySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -110,7 +110,7 @@ public Set<K> keySet() {
         };
     }
 
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Collection<V> values() {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
@@ -122,7 +122,7 @@ public Collection<V> values() {
         };
     }
 
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public Set<Entry<K, V>> entrySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
@@ -398,7 +398,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Entry<K, V>> entrySet() {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 1b3bba1cdbd5..4fe4488df1da 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -287,7 +287,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
@@ -309,7 +309,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 02db44159d67..b82161d87056 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -67,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable @IteratorPolyShrink Stack() {
+    public @Modifiable @IteratorPolyMod Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 07690bc38ed1..ce4f853be24a 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1190,7 +1190,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @DoesNotUnrefineReceiver("modifiability")
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
@@ -1199,7 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
@@ -1209,7 +1209,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -1235,7 +1235,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1268,7 +1268,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
@@ -2059,20 +2059,20 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public final NavigableSet<K> navigableKeySet() {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public final Set<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
@@ -2399,7 +2399,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
@@ -2493,7 +2493,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index ef75d358475c..786be122f4c3 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPolyShrink TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyMod TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -148,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPolyShrink TreeSet() {
+    public @Modifiable @IteratorPolyMod TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyShrink TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -553,7 +553,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 3c1b26f31194..54bf76f120e3 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -167,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyShrink Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -184,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyShrink Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -193,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable @IteratorPolyShrink Vector() {
+    public @Modifiable @IteratorPolyMod Vector() {
         this(10);
     }
 
@@ -207,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @IteratorPolyShrink @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -712,7 +712,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable @IteratorPolyShrink Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 71da4ded8434..1beb700246f4 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -922,7 +922,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
@@ -984,7 +984,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
@@ -1037,7 +1037,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 8b3ec37eb656..7452cfe05578 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -276,7 +276,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -290,7 +290,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -315,7 +315,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 7616cc460089..14090d402e50 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1280,7 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public KeySetView<@KeyFor({"this"}) K,V> keySet() {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1306,7 +1306,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1331,7 +1331,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -2287,7 +2287,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @return the set view
      * @throws NullPointerException if the mappedValue is null
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index f7c3ccf7e476..a3427f395589 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -793,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -806,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index a424fe252d47..3502f7e5c323 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -265,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -278,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index c4cb851d62b7..e59ef4ae1279 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
@@ -188,6 +188,6 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 0058e4e7a7e4..467901acf536 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
@@ -1650,7 +1650,7 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1658,7 +1658,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
@@ -1684,7 +1684,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
@@ -1719,7 +1719,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
@@ -1735,7 +1735,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPolyShrink
+    @IteratorPolyMod
     public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
@@ -3016,7 +3016,7 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> keySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
@@ -3024,14 +3024,14 @@ public NavigableSet<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> navigableKeySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Collection<V> values() {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
@@ -3039,7 +3039,7 @@ public Collection<V> values() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public Set<Map.Entry<K,V>> entrySet() {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
@@ -3047,7 +3047,7 @@ public Set<Map.Entry<K,V>> entrySet() {
         }
 
         @SideEffectFree
-        @IteratorPolyShrink
+        @IteratorPolyMod
         public NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 0fb0ff395c85..6655663deaa3 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -132,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPolyShrink ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyMod ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrink ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index b91d904b7fc1..5ff56d96dd5b 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -154,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyShrink DelayQueue() {}
+    public @Modifiable @IteratorPolyMod DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -164,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index c1c73012e080..0b3a77f0bdad 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -194,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque() {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -204,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -219,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 4983400e1ab9..da6e97349f06 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue() {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -275,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -291,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index fa885e110bec..d034769b8315 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1179,7 +1179,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable @IteratorPolyShrink LinkedTransferQueue() {
+    public @Modifiable @IteratorPolyMod LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1192,7 +1192,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index 9cdf7500b254..dec4dfc3b25d 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrink;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -210,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue() {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -223,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -239,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -263,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrink PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {

From 475bc857e19dfbcdc7e86c30394d220c7412abca Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 3 May 2026 21:21:53 -0700
Subject: [PATCH 070/119] rename IteratorPolyShrink with IteratorPolyMod

---
 .../{IteratorPolyShrink.java => IteratorPolyMod.java}     | 8 ++++----
 ...teratorPolyShrink.java => UnknownIteratorPolyMod.java} | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{IteratorPolyShrink.java => IteratorPolyMod.java} (73%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownIteratorPolyShrink.java => UnknownIteratorPolyMod.java} (91%)

diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
similarity index 73%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
index 164a8f8d1308..32f327fb02a0 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -8,10 +8,10 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * If a collection's type is {@code @IteratorPolyShrink}, then its {@code iterator()} method
+ * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} method
  * preserves the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has
  * type {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
- * collection whose type is {@code @UnknownIteratorPolyShrink}, its iterator is always
+ * collection whose type is {@code @UnknownIteratorPolyMod}, its iterator is always
  * {@code @Unshrinkable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownIteratorPolyShrink.class)
-public @interface IteratorPolyShrink {}
+@SubtypeOf(UnknownIteratorPolyMod.class)
+public @interface IteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
similarity index 91%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
index b74f7b26c438..23746c289a4a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
@@ -13,7 +13,7 @@
  *
  * <p>This is the default qualifier for unannotated types.
  *
- * @see #IteratorPolyShrink
+ * @see #IteratorPolyMod
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
 @Documented
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface UnknownIteratorPolyShrink {}
+public @interface UnknownIteratorPolyMod {}

From b11a5ee615e15bd4528db91505719d43d270dcff Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Thu, 7 May 2026 14:31:10 -0700
Subject: [PATCH 071/119] fixed the location of @iteratorPolyMod in map.java

---
 .../share/classes/java/util/AbstractMap.java  |  9 ++---
 .../share/classes/java/util/Collections.java  | 36 +++++++------------
 .../share/classes/java/util/EnumMap.java      |  9 ++---
 .../share/classes/java/util/HashMap.java      |  9 ++---
 .../share/classes/java/util/Hashtable.java    |  9 ++---
 .../classes/java/util/IdentityHashMap.java    |  9 ++---
 .../classes/java/util/LinkedHashMap.java      | 18 ++++------
 .../share/classes/java/util/Map.java          |  9 ++---
 .../share/classes/java/util/NavigableMap.java |  6 ++--
 .../share/classes/java/util/Properties.java   |  9 ++---
 .../java/util/ReverseOrderSortedMapView.java  | 12 +++----
 .../share/classes/java/util/SortedMap.java    |  9 ++---
 .../share/classes/java/util/TreeMap.java      | 30 ++++++----------
 .../share/classes/java/util/WeakHashMap.java  |  9 ++---
 .../util/concurrent/ConcurrentHashMap.java    | 12 +++----
 .../concurrent/ConcurrentNavigableMap.java    |  9 ++---
 .../concurrent/ConcurrentSkipListMap.java     | 30 ++++++----------
 17 files changed, 78 insertions(+), 156 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index b86bd2ff614f..7600b786e4b2 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -391,8 +391,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -462,8 +461,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -516,8 +514,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    @IteratorPolyMod
-    public abstract @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
+    public abstract @IteratorPolyMod @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 17e1efdd82c0..1702a0129ac9 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -3087,8 +3087,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        @IteratorPolyMod
-        public Set<K> keySet() {
+        public @IteratorPolyMod Set<K> keySet() {
             synchronized (mutex) {
                 if (keySet==null)
                     keySet = new SynchronizedSet<>(m.keySet(), mutex);
@@ -3097,8 +3096,7 @@ public Set<K> keySet() {
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
             synchronized (mutex) {
                 if (entrySet==null)
                     entrySet = new SynchronizedSet<>(m.entrySet(), mutex);
@@ -3106,8 +3104,7 @@ public Set<Map.Entry<K,V>> entrySet() {
             }
         }
 
-        @IteratorPolyMod
-        public Collection<V> values() {
+        public @IteratorPolyMod Collection<V> values() {
             synchronized (mutex) {
                 if (values==null)
                     values = new SynchronizedCollection<>(m.values(), mutex);
@@ -3397,22 +3394,19 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        @IteratorPolyMod
-        public NavigableSet<K> keySet() {
+        public @IteratorPolyMod NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
             }
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
             }
@@ -4191,10 +4185,8 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
-        @IteratorPolyMod
-        public Set<K> keySet()                 { return m.keySet(); }
-        @IteratorPolyMod
-        public Collection<V> values()          { return m.values(); }
+        public @IteratorPolyMod Set<K> keySet()                 { return m.keySet(); }
+        public @IteratorPolyMod Collection<V> values()          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
         public String toString()               { return m.toString(); }
@@ -4229,8 +4221,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        @IteratorPolyMod
-        public Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
             return entrySet;
@@ -4722,20 +4713,17 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        @IteratorPolyMod
-        public NavigableSet<K> keySet() {
+        public @IteratorPolyMod NavigableSet<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
 
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 9e6f081bdd5e..d8d83cf0c035 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -413,8 +413,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      *
      * @return a set view of the keys contained in this enum map
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -457,8 +456,7 @@ public void clear(@Shrinkable KeySet this) {
      *
      * @return a collection view of the values contained in this map
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -508,8 +506,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index f79d9248c75a..7bbb0fa8ead3 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -953,8 +953,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1092,8 +1091,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1159,8 +1157,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 8f7002309c6e..f9ed6296137b 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -703,8 +703,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -751,8 +750,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -840,8 +838,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index d4cfc483288e..f696043ef1d1 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -1035,8 +1035,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1152,8 +1151,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1269,8 +1267,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index a20d9dcc73b0..c29665112620 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -655,8 +655,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -816,8 +815,7 @@ public SequencedSet<K> reversed() {
      *
      * @return a view of the values contained in this map
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -932,8 +930,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -1232,18 +1229,15 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
-        @IteratorPolyMod
-        public Set<K> keySet() {
+        public @IteratorPolyMod Set<K> keySet() {
             return base.sequencedKeySet().reversed();
         }
 
-        @IteratorPolyMod
-        public Collection<V> values() {
+        public @IteratorPolyMod Collection<V> values() {
             return base.sequencedValues().reversed();
         }
 
-        @IteratorPolyMod
-        public Set<Entry<K, V>> entrySet() {
+        public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
             return base.sequencedEntrySet().reversed();
         }
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 3f421077e00c..bbea6545fa71 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -404,8 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -423,8 +422,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -443,8 +441,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index f6e1bf285579..374870daaa8e 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -313,8 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -331,8 +330,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index ddfde6957f6e..3e09b33cc6f3 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -1395,21 +1395,18 @@ public synchronized String toString() {
     }
 
     @Override
-    @IteratorPolyMod
-    public Set<@KeyFor("this") Object> keySet() {
+    public @IteratorPolyMod Set<@KeyFor("this") Object> keySet() {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
-    @IteratorPolyMod
-    public Collection<Object> values() {
+    public @IteratorPolyMod Collection<Object> values() {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    @IteratorPolyMod
-    public Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
+    public @IteratorPolyMod Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
 
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 65d942e22c4a..8218273b4b1b 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -98,8 +98,7 @@ public int size() {
         return base.size();
     }
 
-    @IteratorPolyMod
-    public Set<K> keySet() {
+    public @IteratorPolyMod Set<K> keySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             public Iterator<K> iterator() { return descendingKeyIterator(base); }
@@ -110,8 +109,7 @@ public Set<K> keySet() {
         };
     }
 
-    @IteratorPolyMod
-    public Collection<V> values() {
+    public @IteratorPolyMod Collection<V> values() {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
             public Iterator<V> iterator() { return descendingValueIterator(base); }
@@ -122,8 +120,7 @@ public Collection<V> values() {
         };
     }
 
-    @IteratorPolyMod
-    public Set<Entry<K, V>> entrySet() {
+    public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             public Iterator<Entry<K, V>> iterator() { return descendingEntryIterator(base); }
@@ -398,8 +395,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
-        @IteratorPolyMod
-        public Set<Entry<K, V>> entrySet() {
+        public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
                     return entryIterator();
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 4fe4488df1da..72372e592bd7 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -265,8 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -287,8 +286,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -309,8 +307,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index ce4f853be24a..4e9d79f22bc6 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -1190,8 +1190,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @DoesNotUnrefineReceiver("modifiability")
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1199,8 +1198,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1209,8 +1207,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1235,8 +1232,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code retainAll} and {@code clear} operations.  It does not
      * support the {@code add} or {@code addAll} operations.
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1268,8 +1264,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
@@ -2059,21 +2054,18 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        @IteratorPolyMod
-        public final NavigableSet<K> navigableKeySet() {
+        public final @IteratorPolyMod NavigableSet<K> navigableKeySet() {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
-        @IteratorPolyMod
-        public final Set<K> keySet() {
+        public final @IteratorPolyMod Set<K> keySet() {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
 
@@ -2399,8 +2391,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
         }
@@ -2493,8 +2484,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
         }
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 1beb700246f4..a0665a32b9f2 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -922,8 +922,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -984,8 +983,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1037,8 +1035,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 14090d402e50..0b0741a93d8d 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -1280,8 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public KeySetView<@KeyFor({"this"}) K,V> keySet() {
+    public @IteratorPolyMod KeySetView<@KeyFor({"this"}) K,V> keySet() {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySetView<K,V>(this, null);
@@ -1306,8 +1305,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1331,8 +1329,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
@@ -2287,8 +2284,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @return the set view
      * @throws NullPointerException if the mappedValue is null
      */
-    @IteratorPolyMod
-    public KeySetView<K,V> keySet(V mappedValue) {
+    public @IteratorPolyMod KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
         return new KeySetView<K,V>(this, mappedValue);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index e59ef4ae1279..00b522e13dea 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -147,8 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -168,8 +167,7 @@ public interface ConcurrentNavigableMap<K,V>
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -188,6 +186,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod
-    @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 467901acf536..9788b066fb51 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -1650,16 +1650,14 @@ else if (doRemove(key, v) != null)
      *
      * @return a navigable set view of the keys in this map
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1684,8 +1682,7 @@ else if (doRemove(key, v) != null)
      * <p>The view's iterators and spliterators are
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1719,8 +1716,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1735,8 +1731,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    @IteratorPolyMod
-    public @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -3016,39 +3011,34 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
-        @IteratorPolyMod
-        public NavigableSet<K> keySet() {
+        public @IteratorPolyMod NavigableSet<K> keySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
-        @IteratorPolyMod
-        public Collection<V> values() {
+        public @IteratorPolyMod Collection<V> values() {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
             return valuesView = new Values<>(this);
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
             return entrySetView = new EntrySet<K,V>(this);
         }
 
         @SideEffectFree
-        @IteratorPolyMod
-        public NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
 

From 1cdc8a51f4f8f88cea27a5f8c13e1015b6c6920a Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Thu, 7 May 2026 15:27:44 -0700
Subject: [PATCH 072/119] add the missing @PolyShrink annotations in nested
 classes.

Co-authored-by: Copilot <copilot@github.com>
---
 .../share/classes/java/util/Collections.java  | 26 ++++++++++---------
 .../classes/java/util/LinkedHashMap.java      |  6 ++---
 .../share/classes/java/util/Properties.java   |  9 ++++---
 .../java/util/ReverseOrderSortedMapView.java  | 11 +++++---
 .../share/classes/java/util/TreeMap.java      | 10 +++----
 .../util/concurrent/ConcurrentHashMap.java    |  4 +--
 .../concurrent/ConcurrentSkipListMap.java     |  8 +++---
 7 files changed, 41 insertions(+), 33 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 1702a0129ac9..a1253f84ced9 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -33,8 +33,10 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -3087,7 +3089,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        public @IteratorPolyMod Set<K> keySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (keySet==null)
                     keySet = new SynchronizedSet<>(m.keySet(), mutex);
@@ -3096,7 +3098,7 @@ public void clear() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (entrySet==null)
                     entrySet = new SynchronizedSet<>(m.entrySet(), mutex);
@@ -3104,7 +3106,7 @@ public void clear() {
             }
         }
 
-        public @IteratorPolyMod Collection<V> values() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (values==null)
                     values = new SynchronizedCollection<>(m.values(), mutex);
@@ -3394,19 +3396,19 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        public @IteratorPolyMod NavigableSet<K> keySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
             }
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
             }
@@ -4185,8 +4187,8 @@ private String badValueMsg(Object value) {
         public V get(Object key)               { return m.get(key); }
         public V remove(Object key)            { return m.remove(key); }
         public void clear()                    { m.clear(); }
-        public @IteratorPolyMod Set<K> keySet()                 { return m.keySet(); }
-        public @IteratorPolyMod Collection<V> values()          { return m.values(); }
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink CheckedMap<K,V> this)                 { return m.keySet(); }
+        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink CheckedMap<K,V> this)          { return m.values(); }
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         public int hashCode()                  { return m.hashCode(); }
         public String toString()               { return m.toString(); }
@@ -4221,7 +4223,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
             return entrySet;
@@ -4713,17 +4715,17 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        public @IteratorPolyMod NavigableSet<K> keySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink CheckedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
 
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index c29665112620..07fa1bf131b4 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -1229,15 +1229,15 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
             base.clear();
         }
 
-        public @IteratorPolyMod Set<K> keySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedKeySet().reversed();
         }
 
-        public @IteratorPolyMod Collection<V> values() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedValues().reversed();
         }
 
-        public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedEntrySet().reversed();
         }
 
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 3e09b33cc6f3..4db57dd587c4 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -27,6 +27,9 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -1395,18 +1398,18 @@ public synchronized String toString() {
     }
 
     @Override
-    public @IteratorPolyMod Set<@KeyFor("this") Object> keySet() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrink Properties this) {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
-    public @IteratorPolyMod Collection<Object> values() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<Object> values(@PolyShrink Properties this) {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod Set<Map.Entry<@KeyFor("this") Object, Object>> entrySet() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
 
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 8218273b4b1b..c8b1d7a8b200 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -26,6 +26,9 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.Pure;
 
 /**
@@ -98,7 +101,7 @@ public int size() {
         return base.size();
     }
 
-    public @IteratorPolyMod Set<K> keySet() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             public Iterator<K> iterator() { return descendingKeyIterator(base); }
@@ -109,7 +112,7 @@ public int size() {
         };
     }
 
-    public @IteratorPolyMod Collection<V> values() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ReverseOrderSortedMapView<K,V> this) {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
             public Iterator<V> iterator() { return descendingValueIterator(base); }
@@ -120,7 +123,7 @@ public int size() {
         };
     }
 
-    public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             public Iterator<Entry<K, V>> iterator() { return descendingEntryIterator(base); }
@@ -395,7 +398,7 @@ public String toString() {
             return ReverseOrderSortedMapView.toString(this, entryIterator());
         }
 
-        public @IteratorPolyMod Set<Entry<K, V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
             return new AbstractSet<>() {
                 public Iterator<Entry<K, V>> iterator() {
                     return entryIterator();
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 4e9d79f22bc6..406c810c3f43 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -2054,18 +2054,18 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        public final @IteratorPolyMod NavigableSet<K> navigableKeySet() {
+        public final @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink NavigableSubMap<K,V> this) {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
-        public final @IteratorPolyMod Set<K> keySet() {
+        public final @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink NavigableSubMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink NavigableSubMap<K,V> this) {
             return descendingMap().navigableKeySet();
         }
 
@@ -2391,7 +2391,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
         }
@@ -2484,7 +2484,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
         }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 0b0741a93d8d..942562ff0ea6 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -1280,7 +1280,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyMod KeySetView<@KeyFor({"this"}) K,V> keySet() {
+    public @IteratorPolyMod @PolyShrink @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrink ConcurrentHashMap<K,V> this) {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySetView<K,V>(this, null);
@@ -4678,7 +4678,7 @@ public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness
      *
      * @since 1.8
      */
-    public static final @Modifiable class KeySetView<K,V> extends CollectionView<K,V,K>
+    public static final class KeySetView<K,V> extends CollectionView<K,V,K>
         implements Set<K>, java.io.Serializable {
         private static final long serialVersionUID = 7249069246763182397L;
         @SuppressWarnings("serial") // Conditionally serializable
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 9788b066fb51..7480b0704159 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -3011,27 +3011,27 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
 
         /* ---------------- Submap Views -------------- */
 
-        public @IteratorPolyMod NavigableSet<K> keySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> navigableKeySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
-        public @IteratorPolyMod Collection<V> values() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink SubMap<K,V> this) {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
             return valuesView = new Values<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod Set<Map.Entry<K,V>> entrySet() {
+        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink SubMap<K,V> this) {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
             return entrySetView = new EntrySet<K,V>(this);

From 702b67b4229043a40acb1063a6449fe2e8314fc9 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Thu, 7 May 2026 16:07:21 -0700
Subject: [PATCH 073/119] fully annotated properties.java and
 reverseOrderSortedMapView.java

---
 .../share/classes/java/util/Properties.java   | 34 +++++++++-------
 .../java/util/ReverseOrderSortedMapView.java  | 39 +++++++++++--------
 2 files changed, 41 insertions(+), 32 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 4db57dd587c4..8706a6351ff3 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -26,9 +26,13 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -157,7 +161,7 @@
  * @author  Xueming Shen
  * @since   1.0
  */
-@AnnotatedFor({"index", "lock", "nullness", "propkey"})
+@AnnotatedFor({"index", "lock", "nullness", "propkey", "modifiability"})
 public class Properties extends Hashtable<Object,Object> {
     /**
      * use serialVersionUID from JDK 1.1.X for interoperability
@@ -1370,25 +1374,25 @@ public boolean containsKey(@GuardSatisfied @Nullable @UnknownSignedness Object k
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object put(Object key, Object value) {
+    public synchronized Object put(@Growable @Replaceable Properties this, Object key, Object value) {
         return map.put(key, value);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object remove(@GuardSatisfied @Nullable @UnknownSignedness Object key) {
+    public synchronized Object remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
         return map.remove(key);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void putAll(Map<?, ?> t) {
+    public synchronized void putAll(@Growable @Replaceable Properties this, Map<?, ?> t) {
         map.putAll(t);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void clear() {
+    public synchronized void clear(@Shrinkable Properties this) {
         map.clear();
     }
 
@@ -1514,58 +1518,58 @@ public synchronized void forEach(BiConsumer<? super Object, ? super Object> acti
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void replaceAll(BiFunction<? super Object, ? super Object, ?> function) {
+    public synchronized void replaceAll(@Replaceable Properties this, BiFunction<? super Object, ? super Object, ?> function) {
         map.replaceAll(function);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object putIfAbsent(Object key, Object value) {
+    public synchronized Object putIfAbsent(@Growable Properties this, Object key, Object value) {
         return map.putIfAbsent(key, value);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean remove(@GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
+    public synchronized boolean remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
         return map.remove(key, value);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean replace(Object key, Object oldValue, Object newValue) {
+    public synchronized boolean replace(@Replaceable Properties this, Object key, Object oldValue, Object newValue) {
         return map.replace(key, oldValue, newValue);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object replace(Object key, Object value) {
+    public synchronized Object replace(@Replaceable Properties this, Object key, Object value) {
         return map.replace(key, value);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @PolyNull Object computeIfAbsent(Object key,
+    public synchronized @PolyNull Object computeIfAbsent(@Growable Properties this, Object key,
             Function<? super Object, ? extends @PolyNull Object> mappingFunction) {
         return map.computeIfAbsent(key, mappingFunction);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @PolyNull Object computeIfPresent(Object key,
+    public synchronized @PolyNull Object computeIfPresent(@Shrinkable @Replaceable Properties this, Object key,
             BiFunction<? super Object, ? super Object, ? extends @PolyNull Object> remappingFunction) {
         return map.computeIfPresent(key, remappingFunction);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @PolyNull Object compute(Object key,
+    public synchronized @PolyNull Object compute(@Modifiable Properties this, Object key,
             BiFunction<? super Object, ? super Object, ? extends @PolyNull Object> remappingFunction) {
         return map.compute(key, remappingFunction);
     }
 
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @Nullable Object merge(Object key, Object value,
+    public synchronized @Nullable Object merge(@Modifiable Properties this, Object key, Object value,
             BiFunction<? super Object, ? super Object, ?> remappingFunction) {
         return map.merge(key, value, remappingFunction);
     }
@@ -1577,7 +1581,7 @@ public synchronized Object replace(Object key, Object value) {
     protected void rehash() { /* no-op */ }
 
     @Override
-    public synchronized Object clone() {
+    public synchronized @Modifiable Object clone() {
         Properties clone = (Properties) cloneHashtable();
         clone.map = new ConcurrentHashMap<>(map);
         return clone;
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index c8b1d7a8b200..cab0d012ea53 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -25,17 +25,22 @@
 
 package java.util;
 
+import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.framework.qual.AnnotatedFor;
 
 /**
  * Provides a reversed-ordered view of a SortedMap. Not serializable.
  *
  * TODO: copy in equals and hashCode from AbstractMap
  */
+@AnnotatedFor({"modifiability"})
 class ReverseOrderSortedMapView<K, V> extends AbstractMap<K, V> implements SortedMap<K, V> {
     final SortedMap<K, V> base;
     final Comparator<? super K> cmp;
@@ -65,7 +70,7 @@ public String toString() {
 
     // ========== Map ==========
 
-    public void clear() {
+    public void clear(@Shrinkable ReverseOrderSortedMapView<K,V> this) {
         base.clear();
     }
 
@@ -85,15 +90,15 @@ public boolean isEmpty() {
         return base.isEmpty();
     }
 
-    public V put(K key, V value) {
+    public V put(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, K key, V value) {
         return base.put(key, value);
     }
 
-    public void putAll(Map<? extends K, ? extends V> m) {
+    public void putAll(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, Map<? extends K, ? extends V> m) {
         base.putAll(m);
     }
 
-    public V remove(Object key) {
+    public V remove(@Shrinkable ReverseOrderSortedMapView<K,V> this, Object key) {
         return base.remove(key);
     }
 
@@ -156,19 +161,19 @@ public Map.Entry<K, V> lastEntry() {
         return base.firstEntry();
     }
 
-    public Map.Entry<K,V> pollFirstEntry() {
+    public Map.Entry<K,V> pollFirstEntry(@Shrinkable ReverseOrderSortedMapView<K,V> this) {
         return base.pollLastEntry();
     }
 
-    public Map.Entry<K,V> pollLastEntry() {
+    public Map.Entry<K,V> pollLastEntry(@Shrinkable ReverseOrderSortedMapView<K,V> this) {
         return base.pollFirstEntry();
     }
 
-    public V putFirst(K k, V v) {
+    public V putFirst(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, K k, V v) {
         return base.putLast(k, v);
     }
 
-    public V putLast(K k, V v) {
+    public V putLast(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, K k, V v) {
         return base.putFirst(k, v);
     }
 
@@ -179,7 +184,7 @@ public Comparator<? super K> comparator() {
         return cmp;
     }
 
-    public SortedMap<K, V> subMap(K fromKey, K toKey) {
+    public @PolyModifiable SortedMap<K, V> subMap(@PolyModifiable ReverseOrderSortedMapView<K,V> this, K fromKey, K toKey) {
         if (cmp.compare(fromKey, toKey) <= 0) {
             return new Submap(fromKey, toKey);
         } else {
@@ -187,11 +192,11 @@ public SortedMap<K, V> subMap(K fromKey, K toKey) {
         }
     }
 
-    public SortedMap<K, V> headMap(K toKey) {
+    public @PolyModifiable SortedMap<K, V> headMap(@PolyModifiable ReverseOrderSortedMapView<K,V> this, K toKey) {
         return new Submap(null, toKey);
     }
 
-    public SortedMap<K, V> tailMap(K fromKey) {
+    public @PolyModifiable SortedMap<K, V> tailMap(@PolyModifiable ReverseOrderSortedMapView<K,V> this, K fromKey) {
         return new Submap(fromKey, null);
     }
 
@@ -276,7 +281,7 @@ static class ViewEntry<K, V> implements Map.Entry<K, V> {
 
         public K getKey()             { return key; }
         public V getValue()           { return value; }
-        public V setValue(V newValue) { return map.put(key, newValue); }
+        public V setValue(@Replaceable ViewEntry<K,V> this, V newValue) { return map.put(key, newValue); }
 
         public boolean equals(Object o) {
             return o instanceof Map.Entry<?, ?> e
@@ -415,14 +420,14 @@ public int size() {
             };
         }
 
-        public V put(K key, V value) {
+        public V put(@Growable @Replaceable Submap this, K key, V value) {
             if (aboveHead(key) && belowTail(key))
                 return base.put(key, value);
             else
                 throw new IllegalArgumentException();
         }
 
-        public V remove(Object o) {
+        public V remove(@Shrinkable Submap this, Object o) {
             @SuppressWarnings("unchecked")
             K key = (K) o;
             if (aboveHead(key) && belowTail(key))
@@ -454,7 +459,7 @@ public K lastKey() {
             return last.getKey();
         }
 
-        public SortedMap<K, V> subMap(K from, K to) {
+        public @PolyModifiable SortedMap<K, V> subMap(@PolyModifiable Submap this, K from, K to) {
             if (aboveHead(from) && belowTail(from) &&
                 aboveHead(to) && belowTail(to) &&
                 cmp.compare(from, to) <= 0) {
@@ -464,14 +469,14 @@ public SortedMap<K, V> subMap(K from, K to) {
             }
         }
 
-        public SortedMap<K, V> headMap(K to) {
+        public @PolyModifiable SortedMap<K, V> headMap(@PolyModifiable Submap this, K to) {
             if (aboveHead(to) && belowTail(to))
                 return new Submap(head, to);
             else
                 throw new IllegalArgumentException();
         }
 
-        public SortedMap<K, V> tailMap(K from) {
+        public @PolyModifiable SortedMap<K, V> tailMap(@PolyModifiable Submap this, K from) {
             if (aboveHead(from) && belowTail(from))
                 return new Submap(from, tail);
             else

From c81d4b825e5fd1b2975c825fa0d4e7bc56c73fa0 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Fri, 15 May 2026 15:18:29 -0700
Subject: [PATCH 074/119] add @IteratorPolyMod to methods whoes implementation
 uses iterator's modification method.

---
 .../classes/java/util/AbstractCollection.java |  9 +++++----
 .../share/classes/java/util/AbstractList.java |  3 ++-
 .../java/util/AbstractSequentialList.java     |  9 +++++----
 .../share/classes/java/util/AbstractSet.java  |  3 ++-
 .../share/classes/java/util/Collection.java   |  3 ++-
 .../share/classes/java/util/Collections.java  | 20 +++++++++----------
 .../share/classes/java/util/List.java         |  5 +++--
 .../java/util/SequencedCollection.java        |  5 +++--
 8 files changed, 32 insertions(+), 25 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index f68628dc305e..d9a560c3645b 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -304,7 +305,7 @@ public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
      * @throws NullPointerException          {@inheritDoc}
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
@@ -399,7 +400,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Coll
      * @see #contains(Object)
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -435,7 +436,7 @@ public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollecti
      * @see #contains(Object)
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -465,7 +466,7 @@ public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink AbstractCollecti
      * @throws UnsupportedOperationException {@inheritDoc}
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index 6fc9e1f15dc4..e769954393a3 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -643,7 +644,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractList<E> this)
      * @param toIndex index after last element to be removed
      */
     @DoesNotUnrefineReceiver("modifiability")
-    protected void removeRange(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 8ad691322c4e..de2e0a11bcb4 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -130,7 +131,7 @@ public E get(@UnknownModifiability @GuardSatisfied AbstractSequentialList<E> thi
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E set(@Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public E set(@IteratorPolyMod @Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             ListIterator<E> e = listIterator(index);
             E oldVal = e.next();
@@ -161,7 +162,7 @@ public E set(@Replaceable @GuardSatisfied AbstractSequentialList<E> this, int in
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public void add(@Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public void add(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             listIterator(index).add(element);
         } catch (NoSuchElementException exc) {
@@ -186,7 +187,7 @@ public void add(@Growable @GuardSatisfied AbstractSequentialList<E> this, int in
      * @throws UnsupportedOperationException {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
+    public E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
         try {
             ListIterator<E> e = listIterator(index);
             E outCast = e.next();
@@ -229,7 +230,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E>
      * @throws IllegalArgumentException      {@inheritDoc}
      * @throws IndexOutOfBoundsException     {@inheritDoc}
      */
-    public boolean addAll(@Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
+    public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
         try {
             boolean modified = false;
             ListIterator<E> e1 = listIterator(index);
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index b78c499ed229..ba2fe04bc001 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -26,6 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -178,7 +179,7 @@ public int hashCode(@UnknownModifiability @GuardSatisfied AbstractSet<E> this) {
      * @see #contains(Object)
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
 
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index d61920d8cf76..cbb96ee15828 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -623,7 +624,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean removeIf(@Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index a1253f84ced9..b7a3e95e0846 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -177,7 +177,7 @@ private Collections() {
      * @see List#sort(Comparator)
      */
     @SuppressWarnings("unchecked")
-    public static <T extends Comparable<? super T>> void sort(@Replaceable List<T> list) {
+    public static <T extends Comparable<? super T>> void sort(@IteratorPolyMod @Replaceable List<T> list) {
         list.sort(null);
     }
 
@@ -211,7 +211,7 @@ public static <T extends Comparable<? super T>> void sort(@Replaceable List<T> l
      * @see List#sort(Comparator)
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    public static <T> void sort(@Replaceable List<T> list, @Nullable Comparator<? super T> c) {
+    public static <T> void sort(@IteratorPolyMod @Replaceable List<T> list, @Nullable Comparator<? super T> c) {
         list.sort(c);
     }
 
@@ -417,7 +417,7 @@ else if (cmp > 0)
      * @see    List#reversed List.reversed
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void reverse(@Replaceable @GuardSatisfied List<?> list) {
+    public static void reverse(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
         int size = list.size();
         if (size < REVERSE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=0, mid=size>>1, j=size-1; i<mid; i++, j--)
@@ -464,7 +464,7 @@ public static void reverse(@Replaceable @GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or
      *         its list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@Replaceable @GuardSatisfied List<?> list) {
+    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
         Random rnd = r;
         if (rnd == null)
             r = rnd = new Random(); // harmless race.
@@ -487,7 +487,7 @@ public static void shuffle(@Replaceable @GuardSatisfied List<?> list) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@Replaceable List<?> list, Random rnd) {
+    public static void shuffle(@IteratorPolyMod @Replaceable List<?> list, Random rnd) {
         shuffle(list, (RandomGenerator) rnd);
     }
 
@@ -516,7 +516,7 @@ public static void shuffle(@Replaceable List<?> list, Random rnd) {
      * @since 21
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void shuffle(@Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
+    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
         int size = list.size();
         if (size < SHUFFLE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=size; i>1; i--)
@@ -583,7 +583,7 @@ private static void swap(Object[] arr, int i, int j) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void fill(@Replaceable @GuardSatisfied List<? super T> list, T obj) {
+    public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<? super T> list, T obj) {
         int size = list.size();
 
         if (size < FILL_THRESHOLD || list instanceof RandomAccess) {
@@ -616,7 +616,7 @@ public static <T> void fill(@Replaceable @GuardSatisfied List<? super T> list, T
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@Replaceable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
+    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -844,7 +844,7 @@ public static <T> T max(@UnknownModifiability Collection<? extends T> coll, @Nul
      *         its list-iterator does not support the {@code set} operation.
      * @since 1.4
      */
-    public static void rotate(@Replaceable @GuardSatisfied List<?> list, int distance) {
+    public static void rotate(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, int distance) {
         if (list instanceof RandomAccess || list.size() < ROTATE_THRESHOLD)
             rotate1(list, distance);
         else
@@ -908,7 +908,7 @@ private static void rotate2(List<?> list, int distance) {
      *         its list-iterator does not support the {@code set} operation.
      * @since  1.4
      */
-    public static <T> boolean replaceAll(@Replaceable List<T> list, @Nullable T oldVal, T newVal) {
+    public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list, @Nullable T oldVal, T newVal) {
         boolean result = false;
         int size = list.size();
         if (size < REPLACEALL_THRESHOLD || list instanceof RandomAccess) {
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index a15f9314a485..940be356cd1b 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -34,6 +34,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -484,7 +485,7 @@ public interface List<E> extends SequencedCollection<E> {
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.8
      */
-    default void replaceAll(@Replaceable List<E> this, UnaryOperator<E> operator) {
+    default void replaceAll(@IteratorPolyMod @Replaceable List<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final ListIterator<E> li = this.listIterator();
         while (li.hasNext()) {
@@ -552,7 +553,7 @@ default void replaceAll(@Replaceable List<E> this, UnaryOperator<E> operator) {
      * @since 1.8
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
-    default void sort(@Replaceable List<E> this, Comparator<? super E> c) {
+    default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super E> c) {
         Object[] a = this.toArray();
         Arrays.sort(a, (Comparator) c);
         ListIterator<E> i = this.listIterator();
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 3f722060ae60..5d606fa07939 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -27,6 +27,7 @@
 
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
@@ -185,7 +186,7 @@ default E getLast() {
      *         does not support this operation
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@Shrinkable SequencedCollection<E> this) {
+    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
         it.remove();
@@ -208,7 +209,7 @@ default E removeFirst(@Shrinkable SequencedCollection<E> this) {
      *         does not support this operation
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@Shrinkable SequencedCollection<E> this) {
+    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
         it.remove();

From a9c64441b9bb143db6e8dab7a4f01441d1dab90b Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Fri, 15 May 2026 16:15:07 -0700
Subject: [PATCH 075/119] Remove unnecessary `echo` commands

---
 .azure/azure-pipelines.yml    | 1 -
 .azure/azure-pipelines.yml.m4 | 1 -
 .github/workflows/ci.yml      | 1 -
 3 files changed, 3 deletions(-)

diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
index faf84061d065..c6c0ba503497 100644
--- a/.azure/azure-pipelines.yml
+++ b/.azure/azure-pipelines.yml
@@ -75,7 +75,6 @@ jobs:
           git config --global core.protectNTFS false
           cd ../jdk21u
           git diff --exit-code
-          echo $?
         displayName: clone-related-jdk21u
       - bash: |
           cd ../jdk21u && git status
diff --git a/.azure/azure-pipelines.yml.m4 b/.azure/azure-pipelines.yml.m4
index 8dd5ec8fca13..e8c82d94eceb 100644
--- a/.azure/azure-pipelines.yml.m4
+++ b/.azure/azure-pipelines.yml.m4
@@ -78,7 +78,6 @@ jobs:
           git config --global core.protectNTFS false
           cd ../jdk21u
           git diff --exit-code
-          echo $?
         displayName: clone-related-jdk21u
       - bash: |
           cd ../jdk21u && git status
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9edbcd9d155b..351e3c7f0ab8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -72,7 +72,6 @@ jobs:
           git config --global core.protectNTFS false
           cd ../jdk21u
           git diff --exit-code
-          echo $?
       - name: git merge plan
         run: |
           cd ../jdk21u && git status

From bf051f904262cc8a89c974df66a39ec33fdc457e Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Fri, 15 May 2026 17:14:08 -0700
Subject: [PATCH 076/119] Reinstate return type

---
 src/java.base/share/classes/java/util/ArrayList.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 4ced6e5c85f1..bd2813409fd6 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);

From 107996ba78761327f5bd3ca4e15a275047039b19 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 17 May 2026 16:28:52 -0700
Subject: [PATCH 077/119] update checker jar

---
 checker-qual.jar                              | Bin 290638 -> 291006 bytes
 .../checker/builder/qual/CalledMethods.java   |   2 +-
 .../formatter/qual/ConversionCategory.java    |  10 +++++-----
 .../checker/index/qual/LengthOf.java          |   2 +-
 .../modifiability/qual/IteratorPolyMod.java   |   6 +++---
 .../modifiability/qual/Modifiable.java        |   4 ++--
 .../qual/UnknownIteratorPolyMod.java          |   2 +-
 .../modifiability/qual/Unmodifiable.java      |   4 ++--
 .../nonempty/qual/EnsuresNonEmptyIf.java      |   2 +-
 .../checker/signature/qual/README.md          |   7 +++++++
 10 files changed, 23 insertions(+), 16 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/signature/qual/README.md

diff --git a/checker-qual.jar b/checker-qual.jar
index 2307f392bb16d457f805a0aa1f5a9a1ed67d0f90..4fc8dd802bb4a45a9be1cb8f115c7d5cbb6b6481 100644
GIT binary patch
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diff --git a/src/java.base/share/classes/org/checkerframework/checker/builder/qual/CalledMethods.java b/src/java.base/share/classes/org/checkerframework/checker/builder/qual/CalledMethods.java
index 8ae314c7fcdb..bc457c6a7979 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/builder/qual/CalledMethods.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/builder/qual/CalledMethods.java
@@ -21,7 +21,7 @@
   /**
    * The names of methods that have definitely been called.
    *
-   * @return the names of methods that have definetely been called
+   * @return the names of methods that have definitely been called
    */
   String[] value();
 }
diff --git a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
index 07c28dc621ce..2a3dbd7c899a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
@@ -96,7 +96,7 @@ public enum ConversionCategory {
 
   /**
    * Use if no object of any type can be passed as parameter. In this case, the only legal value is
-   * null. This is seldomly needed, and indicates an error in most cases. For example:
+   * null. This is seldom needed, and indicates an error in most cases. For example:
    *
    * <pre>
    *   format("Test %1$f %1$d", null);
@@ -107,8 +107,8 @@ public enum ConversionCategory {
   NULL(null),
 
   /**
-   * Use if a parameter is not used by the formatter. This is seldomly needed, and indicates an
-   * error in most cases. For example:
+   * Use if a parameter is not used by the formatter. This is seldom needed, and indicates an error
+   * in most cases. For example:
    *
    * <pre>
    *   format("Test %1$s %3$s", "a","unused","b");
@@ -223,7 +223,7 @@ public static boolean isSubsetOf(ConversionCategory a, ConversionCategory b) {
       new ConversionCategory[] {CHAR, INT, FLOAT, TIME, CHAR_AND_INT, INT_AND_TIME, NULL};
 
   /**
-   * Returns the intersection of two categories. This is seldomly needed.
+   * Returns the intersection of two categories. This is seldom needed.
    *
    * <blockquote>
    *
@@ -274,7 +274,7 @@ public static ConversionCategory intersect(ConversionCategory a, ConversionCateg
       new ConversionCategory[] {NULL, CHAR_AND_INT, INT_AND_TIME, CHAR, INT, FLOAT, TIME};
 
   /**
-   * Returns the union of two categories. This is seldomly needed.
+   * Returns the union of two categories. This is seldom needed.
    *
    * <blockquote>
    *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/LengthOf.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/LengthOf.java
index 53adb1af1d4a..980d9796c8a0 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/LengthOf.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/LengthOf.java
@@ -13,7 +13,7 @@
  * detail that may change in the future, when this type may be used to implement more precise
  * refinements.
  *
- * <p>The usual use case for the {@code LengthOf} annotation is in the defintions of custom
+ * <p>The usual use case for the {@code LengthOf} annotation is in the definitions of custom
  * collections. Consider the signature of java.lang.String#length():
  *
  * <pre>
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
index 32f327fb02a0..d5d8ef9253b7 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -8,9 +8,9 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} method
- * preserves the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has
- * type {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
+ * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} method preserves
+ * the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has type
+ * {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
  * collection whose type is {@code @UnknownIteratorPolyMod}, its iterator is always
  * {@code @Unshrinkable}.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index 537f47bfada7..861c92453b59 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -12,8 +12,8 @@
  * {@link UnsupportedOperationException}.
  *
  * <p>As an exception, {@code @Modifiable} means {@code @Unknown*} if the type does not support a
- * given category of operation; for example, {@Modifiable Iterator} means
- * {@code @UnknownGrow @UnknownShrink @Replaceable Iterator}.)
+ * given category of operation; for example, {@code @Modifiable Iterator} means
+ * {@code @UnknownGrow @Shrinkable @UnknownReplace Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
index 23746c289a4a..4c359545002e 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
@@ -13,7 +13,7 @@
  *
  * <p>This is the default qualifier for unannotated types.
  *
- * @see #IteratorPolyMod
+ * @see IteratorPolyMod
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
 @Documented
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index 56f430ac40ca..37618672a08a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -12,8 +12,8 @@
  * UnsupportedOperationException}.
  *
  * <p>As an exception, {@code @Unmodifiable} means {@code @Unknown*} if the type does not support a
- * given category of operation; for example, {@Unmodifiable Iterator} means
- * {@code @UnknownGrow @UnknownShrink @Unreplaceable Iterator}.)
+ * given category of operation; for example, {@code @Unmodifiable Iterator} means
+ * {@code @UnknownGrow @Unshrinkable @UnknownReplace Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmptyIf.java b/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmptyIf.java
index af97ce2509f8..56be2b326f4d 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmptyIf.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/nonempty/qual/EnsuresNonEmptyIf.java
@@ -71,7 +71,7 @@
   /**
    * A wrapper annotation that makes the {@link EnsuresNonEmptyIf} annotation repeatable.
    *
-   * <p>Programmers generally do not need to write ths. It is created by Java when a programmer
+   * <p>Programmers generally do not need to write this. It is created by Java when a programmer
    * writes more than one {@link EnsuresNonEmptyIf} annotation at the same location.
    */
   @Retention(RetentionPolicy.RUNTIME)
diff --git a/src/java.base/share/classes/org/checkerframework/checker/signature/qual/README.md b/src/java.base/share/classes/org/checkerframework/checker/signature/qual/README.md
new file mode 100644
index 000000000000..6d12616e023f
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/signature/qual/README.md
@@ -0,0 +1,7 @@
+# No `@QualifierForLiteral` annotations
+
+These type qualifiers have no `@QualifierForLiteral` annotations.  Instead, they
+use the regular expressions in
+[reflection-util](https://github.com/plume-lib/reflection-util/)'s
+[`SignatureRegexes`
+class](https://github.com/plume-lib/reflection-util/blob/master/src/main/java/org/plumelib/reflection/SignatureRegexes.java).

From 8ad1831f39f8234910544fa2f5a12e70b9718416 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 18 May 2026 00:03:22 -0700
Subject: [PATCH 078/119] rename unknownMod to maybeMod.

---
 checker-qual.jar                              | Bin 291006 -> 290947 bytes
 .../classes/java/util/AbstractCollection.java |  17 +++----
 .../share/classes/java/util/AbstractList.java |  11 ++--
 .../share/classes/java/util/AbstractMap.java  |  17 +++----
 .../java/util/AbstractSequentialList.java     |   3 +-
 .../share/classes/java/util/AbstractSet.java  |   5 +-
 .../share/classes/java/util/Collection.java   |  27 +++++-----
 .../share/classes/java/util/Collections.java  |  47 +++++++++---------
 .../share/classes/java/util/HashMap.java      |   1 -
 .../share/classes/java/util/HashSet.java      |   1 -
 .../classes/java/util/LinkedHashSet.java      |   1 -
 .../share/classes/java/util/List.java         |  27 +++++-----
 .../share/classes/java/util/Map.java          |  27 +++++-----
 .../share/classes/java/util/Set.java          |  23 ++++-----
 .../java/util/concurrent/ConcurrentMap.java   |   5 +-
 .../checker/modifiability/qual/Growable.java  |   2 +-
 .../modifiability/qual/IteratorPolyMod.java   |   4 +-
 .../qual/{UnknownGrow.java => MaybeGrow.java} |   2 +-
 ...PolyMod.java => MaybeIteratorPolyMod.java} |   2 +-
 ...odifiability.java => MaybeModifiable.java} |  10 ++--
 ...{UnknownReplace.java => MaybeReplace.java} |   2 +-
 .../{UnknownShrink.java => MaybeShrink.java}  |   2 +-
 .../modifiability/qual/Modifiable.java        |   4 +-
 .../checker/modifiability/qual/PolyGrow.java  |   2 +-
 .../modifiability/qual/PolyReplace.java       |   2 +-
 .../modifiability/qual/PolyShrink.java        |   2 +-
 .../modifiability/qual/Replaceable.java       |   2 +-
 .../modifiability/qual/Shrinkable.java        |   2 +-
 .../modifiability/qual/Ungrowable.java        |   2 +-
 .../modifiability/qual/Unmodifiable.java      |   4 +-
 .../modifiability/qual/Unreplaceable.java     |   2 +-
 .../modifiability/qual/Unshrinkable.java      |   2 +-
 32 files changed, 123 insertions(+), 137 deletions(-)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownGrow.java => MaybeGrow.java} (96%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownIteratorPolyMod.java => MaybeIteratorPolyMod.java} (94%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownModifiability.java => MaybeModifiable.java} (60%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownReplace.java => MaybeReplace.java} (96%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnknownShrink.java => MaybeShrink.java} (96%)

diff --git a/checker-qual.jar b/checker-qual.jar
index 4fc8dd802bb4a45a9be1cb8f115c7d5cbb6b6481..83bc90c1e12ece18cb4d55b108cd9c11b33fe8ed 100644
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zZ<vnG98QAFJZLgURe-}h+)u-e;i8;b*k+Y-ktpy+oW5hdJddC<xN9Kq2x^QQ1#?Hx
zBZ$xsFn<J|tb8qC;q_U;fcg)Z>?tb<1$f&DT`B#!&1&0EOf~Wo`g+3>zK^xAgj?;c
zb&S4Z30<4rz`(jCs)3~9K)w}x#tAD_0ha*stYGmyK}zIAK?EtD0;pTVIjSQEnl^B&
z&asA(&x7YS8#td&sPK%K6Z|%CZ9N1UHmDzN0Nl2L!<vDIG8<UH4Qyc<9cINIQfdoV
zS2#NcXph1*T*83?-=pXOq>l>&?~g(+9eFUIVFz0n_F&+q9c)?Nivb!wc)I4Xhwk0v
zCo-&=4sfx15s5Eb1Py2;5)uOcDRhzJBLDqP1N<D|fl5~T5An)@m{~G^2nk1+hfn1H
z5dS!$s))SmA7a)K)xr$}Nhj0*;nD>8E~o%@O0RZ;3;5W-%nv6xc4cj>*;pG-16C#B
zst9q08vnx>ecu^1MRprvK*A7eG>$>%zZ(-7F+gjACnMgb=|Joe{NLyCq9a6s9I)|*
ziN4DPT6DF+n1*OPB^IMWTm0W^_9w`5LH&^ud!kMdP7;1MAajAH-CSWTH9&+bJccN_
zf=E|rm&*;6!W9D(H+Zx;=?P5TV2^X2aP`f)LHBsPF-GG!+~#lk5Df}|g5&5x<WwLA
zXimVXxf+ats1xuuaO^Y&zMMcckuzZ!NDYGvO4k=UaoQb@fhioL>)oMUy$B3AMBrJ0
zgE!O!M{k>h%xFwd7LDh`MjRHqO^_Xn32w#W*#NZ%blfrlV;nu;5>rpYzzYxb5H1?f
zd!k-Q?Ztn&i+C0+iQ7G)WA+&soq8Eh4$frYsj*PnUf%Y+GncniY#`MOK2JIuV@AB-
zji4Ctdc$LGT|UNDdBc@0a2*45J`n7<fdM}sSYX4;Fwo}%OF>%&2Hsb||N6gKv21*y
rTZL5^o$U+n>#3l}7as9MYB5f&7M{Aj{ZJ|jqx&Qzw)fz>9+Lk9%Gniv

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index d9a560c3645b..accc7b384066 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
@@ -105,9 +104,9 @@ protected AbstractCollection() {
      * @return an iterator over the elements contained in this collection
      */
     @SideEffectFree
-    public abstract @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
+    public abstract @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
     @Pure
-    public abstract @NonNegative int size(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this);
+    public abstract @NonNegative int size(@GuardSatisfied AbstractCollection<E> this);
 
     /**
      * {@inheritDoc}
@@ -117,7 +116,7 @@ protected AbstractCollection() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this) {
+    public boolean isEmpty(@GuardSatisfied AbstractCollection<E> this) {
         return size() == 0;
     }
 
@@ -133,7 +132,7 @@ public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractCollection<
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    public boolean contains(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext())
@@ -171,7 +170,7 @@ public boolean contains(@UnknownModifiability @GuardSatisfied AbstractCollection
      * }</pre>
      */
     @SideEffectFree
-    public @PolyNull @PolySigned Object[] toArray(@UnknownModifiability AbstractCollection<@PolyNull @PolySigned E> this) {
+    public @PolyNull @PolySigned Object[] toArray(AbstractCollection<@PolyNull @PolySigned E> this) {
         // Estimate size of array; be prepared to see more or fewer elements
         Object[] r = new Object[size()];
         Iterator<E> it = iterator();
@@ -212,7 +211,7 @@ public boolean contains(@UnknownModifiability @GuardSatisfied AbstractCollection
      * @throws NullPointerException {@inheritDoc}
      */
     @SuppressWarnings("unchecked")
-    public <T> @Nullable T [] toArray(@UnknownModifiability @PolyNull T [] a) {
+    public <T> @Nullable T [] toArray(@PolyNull T [] a) {
         // Estimate size of array; be prepared to see more or fewer elements
         int size = size();
         T[] r = a.length >= size ? a :
@@ -342,7 +341,7 @@ public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Ab
      * @see #contains(Object)
      */
     @Pure
-    public boolean containsAll(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
+    public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
         for (Object e : c)
             if (!contains(e))
                 return false;
@@ -488,7 +487,7 @@ public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Abstra
      * @return a string representation of this collection
      */
     @SideEffectFree
-    public String toString(@UnknownModifiability @GuardSatisfied AbstractCollection<E> this) {
+    public String toString(@GuardSatisfied AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         if (! it.hasNext())
             return "[]";
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index e769954393a3..f085367e048d 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -36,7 +36,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -152,7 +151,7 @@ public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public abstract E get(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
+    public abstract E get(@GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
 
     /**
      * {@inheritDoc}
@@ -221,7 +220,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      */
     @Pure
     @StaticallyExecutable
-    public @GTENegativeOne int indexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int indexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator();
         if (o==null) {
             while (it.hasNext())
@@ -249,7 +248,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      */
     @Pure
     @StaticallyExecutable
-    public @GTENegativeOne int lastIndexOf(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int lastIndexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator(size());
         if (o==null) {
             while (it.hasPrevious())
@@ -585,7 +584,7 @@ static void subListRangeCheck(int fromIndex, int toIndex, int size) {
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
         if (!(o instanceof List))
@@ -613,7 +612,7 @@ public boolean equals(@UnknownModifiability @GuardSatisfied AbstractList<E> this
      * @return the hash code value for this list
      */
     @Pure
-    public int hashCode(@UnknownModifiability @GuardSatisfied AbstractList<E> this) {
+    public int hashCode(@GuardSatisfied AbstractList<E> this) {
         int hashCode = 1;
         for (E e : this)
             hashCode = 31*hashCode + (e==null ? 0 : e.hashCode());
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 7600b786e4b2..ce2ecf5905b8 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -36,7 +36,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -116,7 +115,7 @@ protected AbstractMap() {
      * This implementation returns {@code entrySet().size()}.
      */
     @Pure
-    public @NonNegative int size(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
+    public @NonNegative int size(@GuardSatisfied AbstractMap<K, V> this) {
         return entrySet().size();
     }
 
@@ -128,7 +127,7 @@ protected AbstractMap() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
+    public boolean isEmpty(@GuardSatisfied AbstractMap<K, V> this) {
         return size() == 0;
     }
 
@@ -146,7 +145,7 @@ public boolean isEmpty(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> t
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
-    public boolean containsValue(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
+    public boolean containsValue(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (value==null) {
             while (i.hasNext()) {
@@ -180,7 +179,7 @@ public boolean containsValue(@UnknownModifiability @GuardSatisfied AbstractMap<K
      */
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
     @Pure
-    public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Map.Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -213,7 +212,7 @@ public boolean containsKey(@UnknownModifiability @GuardSatisfied AbstractMap<K,
      * @throws NullPointerException          {@inheritDoc}
      */
     @Pure
-    public @Nullable V get(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
+    public @Nullable V get(@GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -542,7 +541,7 @@ public boolean contains(@UnknownSignedness Object v) {
      * @return {@code true} if the specified object is equal to this map
      */
     @Pure
-    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -589,7 +588,7 @@ public boolean equals(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> th
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@UnknownModifiability@GuardSatisfied AbstractMap<K, V> this) {
+    public int hashCode(@GuardSatisfied AbstractMap<K, V> this) {
         int h = 0;
         for (Entry<K, V> entry : entrySet())
             h += entry.hashCode();
@@ -609,7 +608,7 @@ public int hashCode(@UnknownModifiability@GuardSatisfied AbstractMap<K, V> this)
      * @return a string representation of this map
      */
     @SideEffectFree
-    public String toString(@UnknownModifiability @GuardSatisfied AbstractMap<K, V> this) {
+    public String toString(@GuardSatisfied AbstractMap<K, V> this) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (! i.hasNext())
             return "{}";
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index de2e0a11bcb4..0f54212474a9 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -34,7 +34,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
@@ -104,7 +103,7 @@ protected AbstractSequentialList() {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public E get(@UnknownModifiability @GuardSatisfied AbstractSequentialList<E> this, int index) {
+    public E get(@GuardSatisfied AbstractSequentialList<E> this, int index) {
         try {
             return listIterator(index).next();
         } catch (NoSuchElementException exc) {
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index ba2fe04bc001..2cb271b8f946 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -28,7 +28,6 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
@@ -96,7 +95,7 @@ protected AbstractSet() {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    public boolean equals(@UnknownModifiability @GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -130,7 +129,7 @@ public boolean equals(@UnknownModifiability @GuardSatisfied AbstractSet<E> this,
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@UnknownModifiability @GuardSatisfied AbstractSet<E> this) {
+    public int hashCode(@GuardSatisfied AbstractSet<E> this) {
         int h = 0;
         Iterator<E> i = iterator();
         while (i.hasNext()) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index cbb96ee15828..f329dd591378 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -34,7 +34,6 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -293,7 +292,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return the number of elements in this collection
      */
     @Pure
-    @NonNegative int size(@UnknownModifiability @GuardSatisfied Collection<E> this);
+    @NonNegative int size(@GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains no elements.
@@ -302,7 +301,7 @@ public interface Collection<E> extends Iterable<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@UnknownModifiability @GuardSatisfied Collection<E> this);
+    boolean isEmpty(@GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains the specified element.
@@ -325,7 +324,7 @@ public interface Collection<E> extends Iterable<E> {
                 "(though I think a nicer specification would be to return false in that case)"})
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this collection.  There are no
@@ -336,7 +335,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return an {@code Iterator} over the elements in this collection
      */
     @SideEffectFree
-    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Collection<E> this);
+    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Collection<E> this);
 
     /**
      * Returns an array containing all of the elements in this collection.
@@ -365,7 +364,7 @@ public interface Collection<E> extends Iterable<E> {
     "methods, because the most useful type for toArray is not expressible",
     "in the surface syntax that the nullness annotations support."})
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability Collection<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(Collection<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this collection;
@@ -418,7 +417,7 @@ public interface Collection<E> extends Iterable<E> {
      *         runtime component type} of the specified array
      * @throws NullPointerException if the specified array is null
      */
-    <T extends @UnknownSignedness Object> @Nullable T [] toArray(@UnknownModifiability Collection<E> this, @PolyNull T[] a);
+    <T extends @UnknownSignedness Object> @Nullable T [] toArray(Collection<E> this, @PolyNull T[] a);
 
     /**
      * Returns an array containing all of the elements in this collection,
@@ -456,7 +455,7 @@ public interface Collection<E> extends Iterable<E> {
      * @since 11
      */
     @SideEffectFree
-    default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[]> generator) {
+    default <T> T[] toArray(Collection<E> this, IntFunction<T[]> generator) {
         return toArray(generator.apply(0));
     }
 
@@ -544,7 +543,7 @@ default <T> T[] toArray(@UnknownModifiability Collection<E> this, IntFunction<T[
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this collection
@@ -709,7 +708,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      * @see List#equals(Object)
      */
     @Pure
-    boolean equals(@UnknownModifiability @GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
+    boolean equals(@GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
 
     /**
      * Returns the hash code value for this collection.  While the
@@ -727,7 +726,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      * @see Object#equals(Object)
      */
     @Pure
-    int hashCode(@UnknownModifiability @GuardSatisfied Collection<E> this);
+    int hashCode(@GuardSatisfied Collection<E> this);
 
     /**
      * Creates a {@link Spliterator} over the elements in this collection.
@@ -781,7 +780,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      */
     @SideEffectFree
     @Override
-    default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
+    default Spliterator<E> spliterator(Collection<E> this) {
         return Spliterators.spliterator(this, 0);
     }
 
@@ -801,7 +800,7 @@ default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyNonEmpty Stream<E> stream(@UnknownModifiability @PolyNonEmpty Collection<E> this) {
+    default @PolyNonEmpty Stream<E> stream(@PolyNonEmpty Collection<E> this) {
         return StreamSupport.stream(spliterator(), false);
     }
 
@@ -823,7 +822,7 @@ default Spliterator<E> spliterator(@UnknownModifiability Collection<E> this) {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default Stream<E> parallelStream(@UnknownModifiability Collection<E> this) {
+    default Stream<E> parallelStream(Collection<E> this) {
         return StreamSupport.stream(spliterator(), true);
     }
 }
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index b7a3e95e0846..70907b4838f3 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -248,7 +247,7 @@ public static <T> void sort(@IteratorPolyMod @Replaceable List<T> list, @Nullabl
      *         with the elements of the list.
      */
     public static <T>
-    int binarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key) {
+    int binarySearch(List<? extends Comparable<? super T>> list, T key) {
         if (list instanceof RandomAccess || list.size()<BINARYSEARCH_THRESHOLD)
             return Collections.indexedBinarySearch(list, key);
         else
@@ -256,7 +255,7 @@ int binarySearch(@UnknownModifiability List<? extends Comparable<? super T>> lis
     }
 
     private static <T>
-    int indexedBinarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key) {
+    int indexedBinarySearch(List<? extends Comparable<? super T>> list, T key) {
         int low = 0;
         int high = list.size()-1;
 
@@ -276,7 +275,7 @@ else if (cmp > 0)
     }
 
     private static <T>
-    int iteratorBinarySearch(@UnknownModifiability List<? extends Comparable<? super T>> list, T key)
+    int iteratorBinarySearch(List<? extends Comparable<? super T>> list, T key)
     {
         int low = 0;
         int high = list.size()-1;
@@ -352,7 +351,7 @@ private static <T> T get(ListIterator<? extends T> i, int index) {
      *         elements of the list using this comparator.
      */
     @SuppressWarnings("unchecked")
-    public static <T> int binarySearch(@UnknownModifiability List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
+    public static <T> int binarySearch(List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
         if (c==null)
             return binarySearch((List<? extends Comparable<? super T>>) list, key);
 
@@ -362,7 +361,7 @@ public static <T> int binarySearch(@UnknownModifiability List<? extends T> list,
             return Collections.iteratorBinarySearch(list, key, c);
     }
 
-    private static <T> int indexedBinarySearch(@UnknownModifiability List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int indexedBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
 
@@ -381,7 +380,7 @@ else if (cmp > 0)
         return -(low + 1);  // key not found
     }
 
-    private static <T> int iteratorBinarySearch(@UnknownModifiability List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int iteratorBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
         ListIterator<? extends T> i = l.listIterator();
@@ -616,7 +615,7 @@ public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<?
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, @UnknownModifiability List<? extends T> src) {
+    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -659,7 +658,7 @@ public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest,
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T min(@UnknownModifiability Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T min(Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -697,7 +696,7 @@ public static <T extends Object & Comparable<? super T>> T min(@UnknownModifiabi
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T min(@UnknownModifiability Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T min(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)min((Collection<Comparable<Object>>) coll);
 
@@ -736,7 +735,7 @@ public static <T> T min(@UnknownModifiability Collection<? extends T> coll, @Nul
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T max(@UnknownModifiability Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T max(Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -774,7 +773,7 @@ public static <T extends Object & Comparable<? super T>> T max(@UnknownModifiabi
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T max(@UnknownModifiability Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T max(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)max((Collection<Comparable<Object>>) coll);
 
@@ -970,7 +969,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @Pure
     @StaticallyExecutable
-    public static @GTENegativeOne int indexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int indexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -1025,7 +1024,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @Pure
     @StaticallyExecutable
-    public static @GTENegativeOne int lastIndexOfSubList(@UnknownModifiability @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int lastIndexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -1089,7 +1088,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1318,7 +1317,7 @@ public E removeLast() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@UnknownModifiability @PolyNonEmpty Set<? extends T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;
@@ -1411,7 +1410,7 @@ public SequencedSet<E> reversed() {
      *        returned.
      * @return an unmodifiable view of the specified sorted set.
      */
-    public static <T> @Unmodifiable @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@UnknownModifiability @PolyNonEmpty SortedSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@PolyNonEmpty SortedSet<T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSortedSet.class) {
             return s;
@@ -1472,7 +1471,7 @@ public SortedSet<E> tailSet(E fromElement) {
      * @return an unmodifiable view of the specified navigable set
      * @since 1.8
      */
-    public static <T> @Unmodifiable @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@UnknownModifiability @PolyNonEmpty NavigableSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@PolyNonEmpty NavigableSet<T> s) {
         if (s.getClass() == UnmodifiableNavigableSet.class) {
             return s;
         }
@@ -1578,7 +1577,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return an unmodifiable view of the specified list.
      */
     @SuppressWarnings("unchecked")
-    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
+    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
         if (list.getClass() == UnmodifiableList.class || list.getClass() == UnmodifiableRandomAccessList.class) {
            return (List<T>) list;
         }
@@ -1753,7 +1752,7 @@ private Object writeReplace() {
      * @return an unmodifiable view of the specified map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty Map<K,V> unmodifiableMap(@UnknownModifiability @PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty Map<K,V> unmodifiableMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableMap.class) {
             return (Map<K,V>) m;
@@ -2195,7 +2194,7 @@ public V putLast(K k, V v) {
      * @return an unmodifiable view of the specified sorted map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@UnknownModifiability @PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableSortedMap.class) {
             return (SortedMap<K,V>) m;
@@ -2251,7 +2250,7 @@ public SortedMap<K,V> tailMap(K fromKey)
      * @since 1.8
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@UnknownModifiability @PolyNonEmpty NavigableMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@PolyNonEmpty NavigableMap<K, ? extends V> m) {
         if (m.getClass() == UnmodifiableNavigableMap.class) {
             return (NavigableMap<K,V>) m;
         }
@@ -6078,7 +6077,7 @@ static boolean eq(Object o1, Object o2) {
      * @throws NullPointerException if {@code c} is null
      * @since 1.5
      */
-    public static @NonNegative int frequency(@UnknownModifiability Collection<?> c, @Nullable Object o) {
+    public static @NonNegative int frequency(Collection<?> c, @Nullable Object o) {
         int result = 0;
         if (o == null) {
             for (Object e : c)
@@ -6130,7 +6129,7 @@ static boolean eq(Object o1, Object o2) {
      * (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.5
      */
-    public static boolean disjoint(@UnknownModifiability Collection<?> c1, @UnknownModifiability Collection<?> c2) {
+    public static boolean disjoint(Collection<?> c1, Collection<?> c2) {
         // The collection to be used for contains(). Preference is given to
         // the collection who's contains() has lower O() complexity.
         Collection<?> contains = c2;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 7bbb0fa8ead3..f2ae4d9c8b84 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 51241b4ee3a4..b0ddc63979c6 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -33,7 +33,6 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index c592552080f2..0a1b1342550b 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -29,7 +29,6 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.dataflow.qual.Deterministic;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 940be356cd1b..5ef08bc0f975 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -39,7 +39,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -182,7 +181,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return the number of elements in this list
      */
     @Pure
-    @NonNegative int size(@UnknownModifiability @GuardSatisfied List<E> this);
+    @NonNegative int size(@GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains no elements.
@@ -191,7 +190,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@UnknownModifiability @GuardSatisfied List<E> this);
+    boolean isEmpty(@GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains the specified element.
@@ -210,7 +209,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@UnknownModifiability @GuardSatisfied List<E> this, @UnknownSignedness Object o);
+    boolean contains(@GuardSatisfied List<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this list in proper sequence.
@@ -218,7 +217,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @UnknownModifiability @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @UnknownModifiability @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper
@@ -237,7 +236,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see Arrays#asList(Object[])
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability List<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(List<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this list in
@@ -278,7 +277,7 @@ public interface List<E> extends SequencedCollection<E> {
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    <T extends @UnknownSignedness Object> @Nullable T[] toArray(@UnknownModifiability List<E> this, @PolyNull T[] a);
+    <T extends @UnknownSignedness Object> @Nullable T[] toArray(List<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -356,7 +355,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see #contains(Object)
      */
     @Pure
-    boolean containsAll(@UnknownModifiability @GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Appends all of the elements in the specified collection to the end of
@@ -590,7 +589,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    boolean equals(@UnknownModifiability @GuardSatisfied List<E> this, @Nullable Object o);
+    boolean equals(@GuardSatisfied List<E> this, @Nullable Object o);
 
     /**
      * Returns the hash code value for this list.  The hash code of a list
@@ -610,7 +609,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @see #equals(Object)
      */
     @Pure
-    int hashCode(@UnknownModifiability @GuardSatisfied List<E> this);
+    int hashCode(@GuardSatisfied List<E> this);
 
 
     // Positional Access Operations
@@ -624,7 +623,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         ({@code index < 0 || index >= size()})
      */
     @Pure
-    E get(@UnknownModifiability @GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
+    E get(@GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
 
     /**
      * Replaces the element at the specified position in this list with the
@@ -708,7 +707,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int indexOf(@UnknownModifiability @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int indexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns the index of the last occurrence of the specified element
@@ -728,7 +727,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int lastIndexOf(@UnknownModifiability @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int lastIndexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
 
     // List Iterators
@@ -1246,7 +1245,7 @@ default List<E> reversed() {
      * @throws NullPointerException if coll is null, or if it contains any nulls
      * @since 10
      */
-    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> copyOf(@UnknownModifiability @PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
         return ImmutableCollections.listCopy(coll);
     }
 }
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index bbea6545fa71..6b988abe6cd6 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -36,7 +36,6 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -205,7 +204,7 @@ public interface Map<K, V> {
      * @return the number of key-value mappings in this map
      */
     @Pure
-    @NonNegative int size(@UnknownModifiability @GuardSatisfied Map<K, V> this);
+    @NonNegative int size(@GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains no key-value mappings.
@@ -214,7 +213,7 @@ public interface Map<K, V> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@UnknownModifiability @GuardSatisfied Map<K, V> this);
+    boolean isEmpty(@GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains a mapping for the specified
@@ -235,7 +234,7 @@ public interface Map<K, V> {
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
     @EnsuresNonEmptyIf(result=true, expression={"this"})
     @Pure
-    boolean containsKey(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
+    boolean containsKey(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
     /**
      * Returns {@code true} if this map maps one or more keys to the
@@ -255,7 +254,7 @@ public interface Map<K, V> {
      */
     @EnsuresNonEmptyIf(result=true, expression={"this"})
     @Pure
-    boolean containsValue(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
+    boolean containsValue(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
 
     /**
      * Returns the value to which the specified key is mapped,
@@ -282,7 +281,7 @@ public interface Map<K, V> {
      *         does not permit null keys ({@linkplain Collection##optional-restrictions optional})
      */
     @Pure
-    @Nullable V get(@UnknownModifiability @GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
+    @Nullable V get(@GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
 
     // Modification Operations
 
@@ -512,7 +511,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        K getKey(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
+        K getKey(Map.@GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns the value corresponding to this entry.  If the mapping
@@ -525,7 +524,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        V getValue(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
+        V getValue(Map.@GuardSatisfied Entry<K, V> this);
 
         /**
          * Replaces the value corresponding to this entry with the specified
@@ -569,7 +568,7 @@ interface Entry<K, V> {
          *         entry
          */
         @Pure
-        boolean equals(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
+        boolean equals(Map.@GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
 
         /**
          * Returns the hash code value for this map entry.  The hash code
@@ -588,7 +587,7 @@ interface Entry<K, V> {
          * @see #equals(Object)
          */
         @Pure
-        int hashCode(Map.@UnknownModifiability @GuardSatisfied Entry<K, V> this);
+        int hashCode(Map.@GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns a comparator that compares {@link Map.Entry} in natural order on key.
@@ -689,7 +688,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
          */
         @SuppressWarnings("unchecked")
         public static <K extends @NonNull Object, V extends @NonNull Object> 
-        Map.@Unmodifiable Entry<K, V> copyOf(Map.@UnknownModifiability Entry<? extends K, ? extends V> e) {
+        Map.@Unmodifiable Entry<K, V> copyOf(Map.Entry<? extends K, ? extends V> e) {
             Objects.requireNonNull(e);
             if (e instanceof KeyValueHolder) {
                 return (Map.Entry<K, V>) e;
@@ -714,7 +713,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @return {@code true} if the specified object is equal to this map
      */
     @Pure
-    boolean equals(@UnknownModifiability @GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this map.  The hash code of a map is
@@ -730,7 +729,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @see #equals(Object)
      */
     @Pure
-    int hashCode(@UnknownModifiability @GuardSatisfied Map<K, V> this);
+    int hashCode(@GuardSatisfied Map<K, V> this);
 
     // Defaultable methods
 
@@ -1820,7 +1819,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      * @since 10
      */
     @SuppressWarnings({"rawtypes","unchecked"})
-    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@UnknownModifiability @PolyNonEmpty Map<? extends K, ? extends V> map) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@PolyNonEmpty Map<? extends K, ? extends V> map) {
         if (map instanceof ImmutableCollections.AbstractImmutableMap) {
             return (Map<K,V>)map;
         } else if (map.isEmpty()) { // Implicit nullcheck of map
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index b8d6a3878110..3f285d07ddb6 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -31,7 +31,6 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -147,7 +146,7 @@ public interface Set<E> extends Collection<E> {
      * @return the number of elements in this set (its cardinality)
      */
     @Pure
-    @NonNegative int size(@UnknownModifiability @GuardSatisfied Set<E> this);
+    @NonNegative int size(@GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains no elements.
@@ -156,7 +155,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@UnknownModifiability @GuardSatisfied Set<E> this);
+    boolean isEmpty(@GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains the specified element.
@@ -175,7 +174,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this set.  The elements are
@@ -185,7 +184,7 @@ public interface Set<E> extends Collection<E> {
      * @return an iterator over the elements in this set
      */
     @SideEffectFree
-    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Set<E> this);
+    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Set<E> this);
 
     /**
      * Returns an array containing all of the elements in this set.
@@ -204,7 +203,7 @@ public interface Set<E> extends Collection<E> {
      * @return an array containing all the elements in this set
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(@UnknownModifiability Set<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(Set<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this set; the
@@ -248,7 +247,7 @@ public interface Set<E> extends Collection<E> {
      *         set
      * @throws NullPointerException if the specified array is null
      */
-    <T> @Nullable T [] toArray(@UnknownModifiability Set<E> this, @PolyNull T[] a);
+    <T> @Nullable T [] toArray(Set<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -335,7 +334,7 @@ public interface Set<E> extends Collection<E> {
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this set if
@@ -437,7 +436,7 @@ public interface Set<E> extends Collection<E> {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    boolean equals(@UnknownModifiability @GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this set.  The hash code of a set is
@@ -453,7 +452,7 @@ public interface Set<E> extends Collection<E> {
      * @see Set#equals(Object)
      */
     @Pure
-    int hashCode(@UnknownModifiability @GuardSatisfied Set<E> this);
+    int hashCode(@GuardSatisfied Set<E> this);
 
     /**
      * Creates a {@code Spliterator} over the elements in this set.
@@ -480,7 +479,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    default Spliterator<E> spliterator(@UnknownModifiability Set<E> this) {
+    default Spliterator<E> spliterator(Set<E> this) {
         return Spliterators.spliterator(this, Spliterator.DISTINCT);
     }
 
@@ -768,7 +767,7 @@ default Spliterator<E> spliterator(@UnknownModifiability Set<E> this) {
      * @since 10
      */
     @SuppressWarnings("unchecked")
-    static <E extends Object> @Unmodifiable @PolyNonEmpty Set<E> copyOf(@UnknownModifiability @PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty Set<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
         if (coll instanceof ImmutableCollections.AbstractImmutableSet) {
             return (Set<E>)coll;
         } else if (coll.isEmpty()) { // Implicit nullcheck of coll
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 82451837df80..2e08ab6b86ad 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -40,7 +40,6 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -98,7 +97,7 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @Pure
-    default V getOrDefault(@UnknownModifiability ConcurrentMap<K,V> this,Object key, V defaultValue) {
+    default V getOrDefault(ConcurrentMap<K,V> this,Object key, V defaultValue) {
         V v;
         return ((v = get(key)) != null) ? v : defaultValue;
     }
@@ -122,7 +121,7 @@ default V getOrDefault(@UnknownModifiability ConcurrentMap<K,V> this,Object key,
      * @since 1.8
      */
     @Override
-    default void forEach(@UnknownModifiability ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
+    default void forEach(ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K,V> entry : entrySet()) {
             K k;
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
index 5c2b1b7315c1..2c8041469c75 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownGrow.class)
+@SubtypeOf(MaybeGrow.class)
 public @interface Growable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
index d5d8ef9253b7..8ad422162e21 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -11,7 +11,7 @@
  * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} method preserves
  * the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has type
  * {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
- * collection whose type is {@code @UnknownIteratorPolyMod}, its iterator is always
+ * collection whose type is {@code @MaybeIteratorPolyMod}, its iterator is always
  * {@code @Unshrinkable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownIteratorPolyMod.class)
+@SubtypeOf(MaybeIteratorPolyMod.class)
 public @interface IteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java
index c71e04417b1c..92789632cc75 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface UnknownGrow {}
+public @interface MaybeGrow {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
similarity index 94%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
index 4c359545002e..30f794ba7973 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownIteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface UnknownIteratorPolyMod {}
+public @interface MaybeIteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
similarity index 60%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
index 502805c4a134..5a9a53e8f45c 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownModifiability.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
@@ -7,16 +7,16 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @UnknownGrow @UnknownShrink @UnknownReplace}. Represents an
- * unknown or arbitrary modifiability capability; the checker cannot determine whether the
- * collection is growable, shrinkable, or replaceable.
+ * Convenience alias meaning {@code @MaybeGrow @MaybeShrink @MaybeReplace}. Represents an unknown or
+ * arbitrary modifiability capability; the checker cannot determine whether the collection is
+ * growable, shrinkable, or replaceable.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @UnknownGrow @UnknownShrink @UnknownReplace} on each annotated type.
+ * {@code @MaybeGrow @MaybeShrink @MaybeReplace} on each annotated type.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-public @interface UnknownModifiability {}
+public @interface MaybeModifiable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java
index 164002371c5b..70fbbb939007 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java
@@ -22,4 +22,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface UnknownReplace {}
+public @interface MaybeReplace {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java
index 68f5918995e3..d5edc2ccf523 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnknownShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java
@@ -22,4 +22,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface UnknownShrink {}
+public @interface MaybeShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index 861c92453b59..2d5f571deb64 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -11,9 +11,9 @@
  * operation (growing, shrinking, or replacing) on this collection will not result in throwing
  * {@link UnsupportedOperationException}.
  *
- * <p>As an exception, {@code @Modifiable} means {@code @Unknown*} if the type does not support a
+ * <p>As an exception, {@code @Modifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Modifiable Iterator} means
- * {@code @UnknownGrow @Shrinkable @UnknownReplace Iterator}.
+ * {@code @MaybeGrow @Shrinkable @MaybeReplace Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
index 3a4d5b43fbf8..ef00276e8d64 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(UnknownGrow.class)
+@PolymorphicQualifier(MaybeGrow.class)
 public @interface PolyGrow {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
index eb6e7ac5af7d..f8664f330bca 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(UnknownReplace.class)
+@PolymorphicQualifier(MaybeReplace.class)
 public @interface PolyReplace {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
index b491d8626f99..f35eece7403b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(UnknownShrink.class)
+@PolymorphicQualifier(MaybeShrink.class)
 public @interface PolyShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
index bc6199b61f62..2d7c2e7c6926 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownReplace.class)
+@SubtypeOf(MaybeReplace.class)
 public @interface Replaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
index cabe5a275869..1d7fddbeea03 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownShrink.class)
+@SubtypeOf(MaybeShrink.class)
 public @interface Shrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
index 24348a29d853..d160c345b0e4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownGrow.class)
+@SubtypeOf(MaybeGrow.class)
 public @interface Ungrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index 37618672a08a..53ea1e4066ff 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -11,9 +11,9 @@
  * mutating operation (growing, shrinking, or replacing) may throw {@link
  * UnsupportedOperationException}.
  *
- * <p>As an exception, {@code @Unmodifiable} means {@code @Unknown*} if the type does not support a
+ * <p>As an exception, {@code @Unmodifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Unmodifiable Iterator} means
- * {@code @UnknownGrow @Unshrinkable @UnknownReplace Iterator}.
+ * {@code @MaybeGrow @Unshrinkable @MaybeReplace Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
index 1f58bc15625f..32dc1f2e6a47 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownReplace.class)
+@SubtypeOf(MaybeReplace.class)
 public @interface Unreplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
index 1b97e46abbdf..347db2a2b656 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(UnknownShrink.class)
+@SubtypeOf(MaybeShrink.class)
 public @interface Unshrinkable {}

From 75abeb499bc859ae4b7959fc2aa35a326958a92d Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 18 May 2026 00:04:38 -0700
Subject: [PATCH 079/119] remove annotation in iterable.

---
 src/java.base/share/classes/java/lang/Iterable.java | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/Iterable.java b/src/java.base/share/classes/java/lang/Iterable.java
index 25b8ac62b59d..2b0cacbbfbc6 100644
--- a/src/java.base/share/classes/java/lang/Iterable.java
+++ b/src/java.base/share/classes/java/lang/Iterable.java
@@ -25,7 +25,6 @@
 package java.lang;
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
-import org.checkerframework.checker.modifiability.qual.UnknownModifiability;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -52,7 +51,7 @@ public interface Iterable<T> {
      *
      * @return an Iterator.
      */
-    @UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@UnknownModifiability @PolyGrowShrink @PolyNonEmpty Iterable<T> this);
+    @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@PolyGrowShrink @PolyNonEmpty Iterable<T> this);
 
     /**
      * Performs the given action for each element of the {@code Iterable}

From dd5291a7e7fff49814ce6982cca5ea1e86004410 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Mon, 18 May 2026 19:29:24 -0700
Subject: [PATCH 080/119] Fix package of import

---
 src/java.base/share/classes/java/util/AbstractCollection.java   | 2 +-
 src/java.base/share/classes/java/util/AbstractList.java         | 2 +-
 src/java.base/share/classes/java/util/AbstractMap.java          | 2 +-
 src/java.base/share/classes/java/util/AbstractQueue.java        | 2 +-
 src/java.base/share/classes/java/util/AbstractSet.java          | 2 +-
 src/java.base/share/classes/java/util/ArrayDeque.java           | 2 +-
 src/java.base/share/classes/java/util/ArrayList.java            | 2 +-
 src/java.base/share/classes/java/util/Collection.java           | 2 +-
 src/java.base/share/classes/java/util/Collections.java          | 2 +-
 src/java.base/share/classes/java/util/Deque.java                | 2 +-
 src/java.base/share/classes/java/util/EnumSet.java              | 2 +-
 src/java.base/share/classes/java/util/HashMap.java              | 2 +-
 src/java.base/share/classes/java/util/HashSet.java              | 2 +-
 src/java.base/share/classes/java/util/Hashtable.java            | 2 +-
 src/java.base/share/classes/java/util/IdentityHashMap.java      | 2 +-
 src/java.base/share/classes/java/util/Iterator.java             | 2 +-
 src/java.base/share/classes/java/util/JumboEnumSet.java         | 2 +-
 src/java.base/share/classes/java/util/LinkedHashMap.java        | 2 +-
 src/java.base/share/classes/java/util/LinkedHashSet.java        | 2 +-
 src/java.base/share/classes/java/util/LinkedList.java           | 2 +-
 src/java.base/share/classes/java/util/List.java                 | 2 +-
 src/java.base/share/classes/java/util/ListIterator.java         | 2 +-
 src/java.base/share/classes/java/util/Map.java                  | 2 +-
 src/java.base/share/classes/java/util/NavigableMap.java         | 2 +-
 src/java.base/share/classes/java/util/NavigableSet.java         | 2 +-
 src/java.base/share/classes/java/util/PrimitiveIterator.java    | 2 +-
 src/java.base/share/classes/java/util/Properties.java           | 2 +-
 src/java.base/share/classes/java/util/Queue.java                | 2 +-
 src/java.base/share/classes/java/util/RegularEnumSet.java       | 2 +-
 src/java.base/share/classes/java/util/SequencedCollection.java  | 2 +-
 src/java.base/share/classes/java/util/SequencedMap.java         | 2 +-
 src/java.base/share/classes/java/util/SequencedSet.java         | 2 +-
 src/java.base/share/classes/java/util/Set.java                  | 2 +-
 src/java.base/share/classes/java/util/SortedMap.java            | 2 +-
 src/java.base/share/classes/java/util/SortedSet.java            | 2 +-
 src/java.base/share/classes/java/util/Stack.java                | 2 +-
 src/java.base/share/classes/java/util/TreeMap.java              | 2 +-
 src/java.base/share/classes/java/util/TreeSet.java              | 2 +-
 src/java.base/share/classes/java/util/Vector.java               | 2 +-
 src/java.base/share/classes/java/util/WeakHashMap.java          | 2 +-
 .../share/classes/java/util/concurrent/ArrayBlockingQueue.java  | 2 +-
 .../share/classes/java/util/concurrent/ConcurrentHashMap.java   | 2 +-
 .../classes/java/util/concurrent/ConcurrentLinkedDeque.java     | 2 +-
 .../classes/java/util/concurrent/ConcurrentLinkedQueue.java     | 2 +-
 .../classes/java/util/concurrent/ConcurrentSkipListMap.java     | 2 +-
 .../classes/java/util/concurrent/ConcurrentSkipListSet.java     | 2 +-
 .../classes/java/util/concurrent/CopyOnWriteArrayList.java      | 2 +-
 .../share/classes/java/util/concurrent/CopyOnWriteArraySet.java | 2 +-
 .../share/classes/java/util/concurrent/DelayQueue.java          | 2 +-
 .../share/classes/java/util/concurrent/LinkedBlockingDeque.java | 2 +-
 .../share/classes/java/util/concurrent/LinkedBlockingQueue.java | 2 +-
 .../share/classes/java/util/concurrent/LinkedTransferQueue.java | 2 +-
 .../classes/java/util/concurrent/PriorityBlockingQueue.java     | 2 +-
 .../share/classes/java/util/concurrent/SynchronousQueue.java    | 2 +-
 54 files changed, 54 insertions(+), 54 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index accc7b384066..c806fa237ae1 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -42,7 +42,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index f085367e048d..7e81260494d0 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -44,7 +44,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index ce2ecf5905b8..04b3662a2d54 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -44,7 +44,7 @@
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index d50e5506893c..fd57373972dc 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -42,7 +42,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index 2cb271b8f946..6e0b3588eb41 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 0a3f9864e14d..db5a2b16c971 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -53,7 +53,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index bd2813409fd6..c496fa453ea2 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -47,7 +47,7 @@
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index f329dd591378..f68d1bc7b16c 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -43,7 +43,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 70907b4838f3..8f443c3308f8 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -51,7 +51,7 @@
 import org.checkerframework.common.value.qual.ArrayLen;
 import org.checkerframework.common.value.qual.MinLen;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 44b5dd360984..060a5842b7a1 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -48,7 +48,7 @@
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index eaed5d30f237..d6c0d6ed1508 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 import jdk.internal.access.SharedSecrets;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index f2ae4d9c8b84..0e727adacedd 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -46,7 +46,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index b0ddc63979c6..9cfb6518bbf7 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -40,7 +40,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index f9ed6296137b..e1542a0665be 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -45,7 +45,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index f696043ef1d1..e60676dbcb2c 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -43,7 +43,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index b767443e391c..3016db9216d3 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/JumboEnumSet.java b/src/java.base/share/classes/java/util/JumboEnumSet.java
index 72dc66eb2072..21c9a851b21a 100644
--- a/src/java.base/share/classes/java/util/JumboEnumSet.java
+++ b/src/java.base/share/classes/java/util/JumboEnumSet.java
@@ -35,7 +35,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 07fa1bf131b4..992c63c9a4d0 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -42,7 +42,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 0a1b1342550b..7bf974006445 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.dataflow.qual.Deterministic;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index d2ecaa17bb68..811c3c99017f 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -46,7 +46,7 @@
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 5ef08bc0f975..2137108864ea 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -48,7 +48,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/ListIterator.java b/src/java.base/share/classes/java/util/ListIterator.java
index b92d41fd16f1..f30650384a17 100644
--- a/src/java.base/share/classes/java/util/ListIterator.java
+++ b/src/java.base/share/classes/java/util/ListIterator.java
@@ -33,7 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 6b988abe6cd6..798de4e29f5c 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -49,7 +49,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 374870daaa8e..0742ba165b37 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -43,7 +43,7 @@
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 3eff9dee501c..f62300e9a349 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -41,7 +41,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/PrimitiveIterator.java b/src/java.base/share/classes/java/util/PrimitiveIterator.java
index 150564d3774a..5536b06b2c73 100644
--- a/src/java.base/share/classes/java/util/PrimitiveIterator.java
+++ b/src/java.base/share/classes/java/util/PrimitiveIterator.java
@@ -26,7 +26,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
 import java.util.function.Consumer;
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 8706a6351ff3..3b9af3271012 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -40,7 +40,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.propkey.qual.PropertyKey;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/Queue.java b/src/java.base/share/classes/java/util/Queue.java
index 1d4f0b21191e..7d91f1e7a656 100644
--- a/src/java.base/share/classes/java/util/Queue.java
+++ b/src/java.base/share/classes/java/util/Queue.java
@@ -44,7 +44,7 @@
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
diff --git a/src/java.base/share/classes/java/util/RegularEnumSet.java b/src/java.base/share/classes/java/util/RegularEnumSet.java
index 9b5a5e2dddaf..0fe13bdab68c 100644
--- a/src/java.base/share/classes/java/util/RegularEnumSet.java
+++ b/src/java.base/share/classes/java/util/RegularEnumSet.java
@@ -36,7 +36,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 5d606fa07939..9a932f875249 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 
 
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index bc4585f01d23..615ab9f0622b 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
 import jdk.internal.util.NullableKeyValueHolder;
diff --git a/src/java.base/share/classes/java/util/SequencedSet.java b/src/java.base/share/classes/java/util/SequencedSet.java
index d4bac4cd6747..c4fa139e9e41 100644
--- a/src/java.base/share/classes/java/util/SequencedSet.java
+++ b/src/java.base/share/classes/java/util/SequencedSet.java
@@ -25,7 +25,7 @@
 
 package java.util;
 
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 
 /**
  * A collection that is both a {@link SequencedCollection} and a {@link Set}. As such,
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 3f285d07ddb6..d213be1aa6e7 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -40,7 +40,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 72372e592bd7..8c120b8b1b9c 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -35,7 +35,7 @@
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 796dee2ba8bf..1de786fae66d 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index b82161d87056..0e0ed3ea88f9 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -33,7 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 406c810c3f43..16e10d59ddf2 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -45,7 +45,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 786be122f4c3..15837c1acc62 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -41,7 +41,7 @@
 import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 54bf76f120e3..2fa58f55ba2d 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -45,7 +45,7 @@
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index a0665a32b9f2..519da9a7c040 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -44,7 +44,7 @@
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 7452cfe05578..fe19d11e978e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -52,7 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 942562ff0ea6..72883682cb90 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -57,7 +57,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index a3427f395589..1f12eb6b14a4 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -53,7 +53,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 3502f7e5c323..4c9a49ac8941 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -52,7 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 7480b0704159..54c6a995c39f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -54,7 +54,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 6655663deaa3..fa70a0e9b760 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -51,7 +51,7 @@
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index b242e33dcf19..777938c56fd8 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -54,7 +54,7 @@
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.common.value.qual.StaticallyExecutable;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
index 84c58335c031..84bd296a346a 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
@@ -51,7 +51,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 5ff56d96dd5b..3f6af0d4eee3 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -48,7 +48,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 0b3a77f0bdad..f524be2c2c3e 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -52,7 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index da6e97349f06..092c5f47c256 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -51,7 +51,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index d034769b8315..e10695be96c2 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -52,7 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index dec4dfc3b25d..edecdf4a91bc 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -52,7 +52,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index 3950b648cf02..461568f2a42d 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -50,7 +50,7 @@
 import org.checkerframework.checker.nullness.qual.PolyNull;
 import org.checkerframework.checker.signedness.qual.PolySigned;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
-import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
+import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.framework.qual.AnnotatedFor;

From 1a1e9027952aa4b1d8fcccb35bacf17d1883cb85 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Tue, 19 May 2026 11:27:47 -0700
Subject: [PATCH 081/119] Formatting

---
 src/java.base/share/classes/java/util/Hashtable.java           | 2 +-
 src/java.base/share/classes/java/util/LinkedHashSet.java       | 1 -
 src/java.base/share/classes/java/util/SequencedCollection.java | 2 --
 src/java.base/share/classes/java/util/SortedMap.java           | 2 +-
 4 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index f9ed6296137b..f1bcf163d166 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -32,9 +32,9 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
-import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 0a1b1342550b..f2ced291064b 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -33,7 +33,6 @@
 import org.checkerframework.dataflow.qual.Deterministic;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
-
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
 
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 5d606fa07939..fbaae2995a11 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -25,14 +25,12 @@
 
 package java.util;
 
-
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.dataflow.qual.DoesNotUnrefineReceiver;
 import org.checkerframework.dataflow.qual.Pure;
 
-
 /**
  * A collection that has a well-defined encounter order, that supports operations at both ends,
  * and that is reversible. The elements of a sequenced collection have an <a id="encounter">
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 72372e592bd7..dbb88fc1e695 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -30,8 +30,8 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrink;
-import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
+import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;

From c361f120748c3461f18add215e648723988895ef Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Thu, 21 May 2026 16:29:22 -0700
Subject: [PATCH 082/119] fixed collection.java to array

---
 src/java.base/share/classes/java/util/Collection.java | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 70822c1aac0d..cf08a7d6292a 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -280,7 +280,7 @@
  */
 
 @CFComment("lock/nullness: Subclasses of this interface/class may opt to prohibit null elements")
-@AnnotatedFor({"lock", "nullness", "index"})
+@AnnotatedFor({"lock", "nullness", "index", "modifiability"})
 public interface Collection<E> extends Iterable<E> {
     // Query Operations
 
@@ -417,14 +417,7 @@ public interface Collection<E> extends Iterable<E> {
      *         runtime component type} of the specified array
      * @throws NullPointerException if the specified array is null
      */
-<<<<<<< HEAD
-    <T extends @UnknownSignedness Object> @Nullable T [] toArray(Collection<E> this, @PolyNull T[] a);
-||||||| f7ef3b0183d
-    @SideEffectFree
-    <T extends @UnknownSignedness Object> @Nullable T [] toArray(@PolyNull T[] a);
-=======
-    <T extends @UnknownSignedness Object> @Nullable T [] toArray(@PolyNull T[] a);
->>>>>>> 805ed882efc3db6c39efbf35bfa1d706ac857291
+    <T extends @UnknownSignedness Object> @Nullable T[] toArray(Collection<E> this, @PolyNull T[] a);
 
     /**
      * Returns an array containing all of the elements in this collection,

From c84d0dfe1b758c8a35a46b7d6f3d27f137d0835f Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Thu, 21 May 2026 18:21:24 -0700
Subject: [PATCH 083/119] Fix bad merge

---
 src/java.base/share/classes/java/util/AbstractMap.java          | 1 -
 src/java.base/share/classes/java/util/Deque.java                | 2 --
 src/java.base/share/classes/java/util/ImmutableCollections.java | 1 -
 src/java.base/share/classes/java/util/Properties.java           | 2 --
 4 files changed, 6 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 327036430774..2427bba6be06 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -439,7 +439,6 @@ public void clear() {
 
                 @Pure
                 @EnsuresNonEmptyIf(result = true, expression = "this")
-                @Pure
                 public boolean contains(@UnknownSignedness Object k) {
                     return AbstractMap.this.containsKey(k);
                 }
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 28e28106f4b6..413f1c10a16e 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -356,7 +356,6 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmpty("this")
-    @Pure
     E getFirst(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
@@ -369,7 +368,6 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmpty("this")
-    @Pure
     E getLast(@GuardSatisfied @NonEmpty @CanShrink Deque<E> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/ImmutableCollections.java b/src/java.base/share/classes/java/util/ImmutableCollections.java
index a6ceaf0e4cb3..65f6d6f4e570 100644
--- a/src/java.base/share/classes/java/util/ImmutableCollections.java
+++ b/src/java.base/share/classes/java/util/ImmutableCollections.java
@@ -618,7 +618,6 @@ public boolean isEmpty() {
         }
 
         @Override
-        @Pure
         @SuppressWarnings("unchecked")
         @Pure
         public E get(int index) {
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index b36496e8fb62..f0d16353da49 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -1511,14 +1511,12 @@ public Iterator<Map.Entry<Object, Object>> iterator() {
 
     @Pure
     @Override
-    @Pure
     public synchronized boolean equals(Object o) {
         return map.equals(o);
     }
 
     @Pure
     @Override
-    @Pure
     public synchronized int hashCode() {
         return map.hashCode();
     }

From 7396edfccffefc510eb26fd42e2c4ebb0c0abdd4 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 23 May 2026 12:48:58 -0700
Subject: [PATCH 084/119] Fix formatting

---
 .../share/classes/java/util/ArrayDeque.java   | 63 ++++++++-----
 .../share/classes/java/util/ArrayList.java    | 42 ++++++---
 .../share/classes/java/util/HashMap.java      | 29 +++---
 .../share/classes/java/util/HashSet.java      |  6 +-
 .../classes/java/util/LinkedHashMap.java      | 45 ++++++---
 .../classes/java/util/LinkedHashSet.java      | 12 ++-
 .../share/classes/java/util/LinkedList.java   | 69 +++++++++-----
 .../share/classes/java/util/NavigableSet.java |  9 +-
 .../share/classes/java/util/Properties.java   | 24 +++--
 .../share/classes/java/util/SortedMap.java    |  3 +-
 .../share/classes/java/util/SortedSet.java    |  9 +-
 .../share/classes/java/util/TreeMap.java      | 21 +++--
 .../share/classes/java/util/TreeSet.java      | 21 +++--
 .../share/classes/java/util/Vector.java       | 57 ++++++++----
 .../util/concurrent/ArrayBlockingQueue.java   | 39 +++++---
 .../util/concurrent/ConcurrentHashMap.java    | 24 +++--
 .../concurrent/ConcurrentLinkedDeque.java     | 54 +++++++----
 .../concurrent/ConcurrentLinkedQueue.java     | 27 ++++--
 .../concurrent/ConcurrentSkipListMap.java     | 54 +++++++----
 .../concurrent/ConcurrentSkipListSet.java     | 18 ++--
 .../util/concurrent/CopyOnWriteArraySet.java  | 21 +++--
 .../java/util/concurrent/DelayQueue.java      | 36 ++++---
 .../util/concurrent/LinkedBlockingDeque.java  | 93 ++++++++++++-------
 .../util/concurrent/LinkedBlockingQueue.java  | 36 ++++---
 .../util/concurrent/LinkedTransferQueue.java  | 48 ++++++----
 .../concurrent/PriorityBlockingQueue.java     | 42 ++++++---
 .../util/concurrent/SynchronousQueue.java     | 33 ++++---
 27 files changed, 622 insertions(+), 313 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 84390dd83395..5a5c34b96c7f 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -310,7 +310,8 @@ static final <E> E nonNullElementAt(@PolyNull @PolySigned Object[] es, int i) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {        if (e == null)
+    public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+        if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
         es[head = dec(head, es.length)] = e;
@@ -328,7 +329,8 @@ public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {        if (e == null)
+    public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+        if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
         es[tail] = e;
@@ -348,7 +350,8 @@ public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable ArrayDeque<E> this, Collection<? extends E> c) {        final int s, needed;
+    public boolean addAll(@Growable ArrayDeque<E> this, Collection<? extends E> c) {
+        final int s, needed;
         if ((needed = (s = size()) + c.size() + 1 - elements.length) > 0)
             grow(needed);
         copyElements(c);
@@ -368,7 +371,8 @@ private void copyElements(Collection<? extends E> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {        addFirst(e);
+    public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
+        addFirst(e);
         return true;
     }
 
@@ -381,7 +385,8 @@ private void copyElements(Collection<? extends E> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable ArrayDeque<E> this, E e) {        addLast(e);
+    public boolean offerLast(@Growable ArrayDeque<E> this, E e) {
+        addLast(e);
         return true;
     }
 
@@ -390,7 +395,8 @@ private void copyElements(Collection<? extends E> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {        E e = pollFirst();
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+        E e = pollFirst();
         if (e == null)
             throw new NoSuchElementException();
         return e;
@@ -401,7 +407,8 @@ private void copyElements(Collection<? extends E> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {        E e = pollLast();
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+        E e = pollLast();
         if (e == null)
             throw new NoSuchElementException();
         return e;
@@ -409,7 +416,8 @@ private void copyElements(Collection<? extends E> c) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {        final Object[] es;
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
+        final Object[] es;
         final int h;
         E e = elementAt(es = elements, h = head);
         if (e != null) {
@@ -421,7 +429,8 @@ private void copyElements(Collection<? extends E> c) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {        final Object[] es;
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
+        final Object[] es;
         final int t;
         E e = elementAt(es = elements, t = dec(tail, es.length));
         if (e != null)
@@ -477,7 +486,8 @@ public E getLast(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o != null) {
+    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o != null) {
             final Object[] es = elements;
             for (int i = head, end = tail, to = (i <= end) ? end : es.length;
                  ; i = 0, to = end) {
@@ -506,7 +516,8 @@ public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink Arra
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o != null) {
+    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o != null) {
             final Object[] es = elements;
             for (int i = tail, end = head, to = (i >= end) ? end : 0;
                  ; i = es.length, to = end) {
@@ -535,7 +546,8 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Array
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {        addLast(e);
+    public boolean add(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+        addLast(e);
         return true;
     }
 
@@ -550,7 +562,8 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Array
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {        return offerLast(e);
+    public boolean offer(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+        return offerLast(e);
     }
 
     /**
@@ -566,7 +579,8 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Array
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {        return removeFirst();
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+        return removeFirst();
     }
 
     /**
@@ -581,7 +595,8 @@ public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink Array
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {        return pollFirst();
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
+        return pollFirst();
     }
 
     /**
@@ -626,7 +641,8 @@ public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {        addFirst(e);
+    public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+        addFirst(e);
     }
 
     /**
@@ -641,7 +657,8 @@ public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {        return removeFirst();
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ArrayDeque<E> this) {
+        return removeFirst();
     }
 
     /**
@@ -963,7 +980,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink ArrayDeque<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink ArrayDeque<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -982,7 +1000,8 @@ public boolean removeAll(@CanShrink ArrayDeque<E> this, Collection<? extends @Un
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
@@ -1099,7 +1118,8 @@ public boolean contains(@GuardSatisfied ArrayDeque<E> this, @GuardSatisfied @Nul
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return removeFirstOccurrence(o);
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return removeFirstOccurrence(o);
     }
 
     /**
@@ -1108,7 +1128,8 @@ public boolean contains(@GuardSatisfied ArrayDeque<E> this, @GuardSatisfied @Nul
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {        circularClear(elements, head, tail);
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayDeque<E> this) {
+        circularClear(elements, head, tail);
         head = tail = 0;
     }
 
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 1ffec09c1a83..0ccb44c7e8ce 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -568,7 +568,8 @@ public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {        rangeCheckForAdd(index);
+    public void add(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, E element) {
+        rangeCheckForAdd(index);
         modCount++;
         final int s;
         Object[] elementData;
@@ -588,7 +589,8 @@ public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable ArrayList<E> this, E element) {        add(0, element);
+    public void addFirst(@Growable ArrayList<E> this, E element) {
+        add(0, element);
     }
 
     /**
@@ -598,7 +600,8 @@ public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable ArrayList<E> this, E element) {        add(element);
+    public void addLast(@Growable ArrayList<E> this, E element) {
+        add(element);
     }
 
     /**
@@ -612,7 +615,8 @@ public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int index) {        Objects.checkIndex(index, size);
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @NonNegative int index) {
+        Objects.checkIndex(index, size);
         final Object[] es = elementData;
 
         @SuppressWarnings("unchecked") E oldValue = (E) es[index];
@@ -629,7 +633,8 @@ public boolean add(@Growable @GuardSatisfied ArrayList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable ArrayList<E> this) {        if (size == 0) {
+    public E removeFirst(@Shrinkable ArrayList<E> this) {
+        if (size == 0) {
             throw new NoSuchElementException();
         } else {
             Object[] es = elementData;
@@ -647,7 +652,8 @@ public E removeFirst(@Shrinkable ArrayList<E> this) {        if (size == 0) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable ArrayList<E> this) {        int last = size - 1;
+    public E removeLast(@Shrinkable ArrayList<E> this) {
+        int last = size - 1;
         if (last < 0) {
             throw new NoSuchElementException();
         } else {
@@ -764,7 +770,8 @@ int hashCodeRange(int from, int to) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        final Object[] es = elementData;
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        final Object[] es = elementData;
         final int size = this.size;
         int i = 0;
         found: {
@@ -801,7 +808,8 @@ private void fastRemove(Object[] es, int i) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this) {        modCount++;
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this) {
+        modCount++;
         final Object[] es = elementData;
         for (int to = size, i = size = 0; i < to; i++)
             es[i] = null;
@@ -822,7 +830,8 @@ private void fastRemove(Object[] es, int i) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, Collection<? extends E> c) {        Object[] a = c.toArray();
+    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, Collection<? extends E> c) {
+        Object[] a = c.toArray();
         modCount++;
         int numNew = a.length;
         if (numNew == 0)
@@ -853,7 +862,8 @@ private void fastRemove(Object[] es, int i) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, Collection<? extends E> c) {        rangeCheckForAdd(index);
+    public boolean addAll(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int index, Collection<? extends E> c) {
+        rangeCheckForAdd(index);
 
         Object[] a = c.toArray();
         modCount++;
@@ -945,7 +955,8 @@ private static String outOfBoundsMsg(int fromIndex, int toIndex) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {        return batchRemove(c, false, 0, size);
+    public boolean removeAll(@Shrinkable @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        return batchRemove(c, false, 0, size);
     }
 
     /**
@@ -966,7 +977,8 @@ private static String outOfBoundsMsg(int fromIndex, int toIndex) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {        return batchRemove(c, true, 0, size);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayList<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        return batchRemove(c, true, 0, size);
     }
 
     boolean batchRemove(Collection<?> c, boolean complement,
@@ -1875,7 +1887,8 @@ private static boolean isClear(long[] bits, int i) {
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E> filter) {        return removeIf(filter, 0, size);
+    public boolean removeIf(@Shrinkable @CanShrink ArrayList<E> this, Predicate<? super E> filter) {
+        return removeIf(filter, 0, size);
     }
 
     /**
@@ -1938,7 +1951,8 @@ private void replaceAllRange(@Replaceable ArrayList<E> this, UnaryOperator<E> op
     @SuppressWarnings("unchecked")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void sort(@Replaceable ArrayList<E> this, Comparator<? super E> c) {        final int expectedModCount = modCount;
+    public void sort(@Replaceable ArrayList<E> this, Comparator<? super E> c) {
+        final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, size, c);
         if (modCount != expectedModCount)
             throw new ConcurrentModificationException();
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 6112a0a4529a..3c8f01e98d41 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -48,11 +48,10 @@
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
-import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
-// import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
 import org.checkerframework.framework.qual.CFComment;
 import org.checkerframework.framework.qual.DoesNotUnrefineReceiver;
+// import org.checkerframework.dataflow.qual.SideEffectsOnly;
 
 import java.io.IOException;
 import java.io.InvalidObjectException;
@@ -660,7 +659,8 @@ public boolean containsKey(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied @
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, K key, V value) {        return putVal(hash(key), key, value, false, true);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, K key, V value) {
+        return putVal(hash(key), key, value, false, true);
     }
 
     /**
@@ -835,7 +835,8 @@ else if ((e = tab[index = (n - 1) & hash]) != null) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extends V> m) {        putMapEntries(m, true);
+    public void putAll(@Growable @Replaceable @GuardSatisfied HashMap<K, V> this, Map<? extends K, ? extends V> m) {
+        putMapEntries(m, true);
     }
 
     /**
@@ -849,7 +850,8 @@ else if ((e = tab[index = (n - 1) & hash]) != null) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied HashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        Node<K,V> e;
+    public @Nullable V remove(@Shrinkable @GuardSatisfied HashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        Node<K,V> e;
         return (e = removeNode(hash(key), key, null, false, true)) == null ?
             null : e.value;
     }
@@ -911,7 +913,8 @@ else if (node == p)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied HashMap<K, V> this) {        Node<K,V>[] tab;
+    public void clear(@Shrinkable @GuardSatisfied HashMap<K, V> this) {
+        Node<K,V>[] tab;
         modCount++;
         if ((tab = table) != null && size > 0) {
             size = 0;
@@ -1225,7 +1228,7 @@ public final void forEach(Consumer<? super Map.Entry<K,V>> action) {
 
     @Override
     @Pure
-    public V getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, V defaultValue) {
+    public V getOrDefault(HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, V defaultValue) {
         Node<K,V> e;
         return (e = getNode(key)) == null ? defaultValue : e.value;
     }
@@ -1234,19 +1237,22 @@ public V getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, V
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V putIfAbsent(@Growable HashMap<K,V> this, K key, V value) {        return putVal(hash(key), key, value, true, true);
+    public @Nullable V putIfAbsent(@Growable HashMap<K,V> this, K key, V value) {
+        return putVal(hash(key), key, value, true, true);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {        return removeNode(hash(key), key, value, true, true) != null;
+    public boolean remove(@Shrinkable HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
+        return removeNode(hash(key), key, value, true, true) != null;
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newValue) {        Node<K,V> e; V v;
+    public boolean replace(@Replaceable HashMap<K,V> this, K key, V oldValue, V newValue) {
+        Node<K,V> e; V v;
         if ((e = getNode(key)) != null &&
             ((v = e.value) == oldValue || (v != null && v.equals(oldValue)))) {
             e.value = newValue;
@@ -1259,7 +1265,8 @@ public V getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, V
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V replace(@Replaceable HashMap<K,V> this, K key, V value) {        Node<K,V> e;
+    public @Nullable V replace(@Replaceable HashMap<K,V> this, K key, V value) {
+        Node<K,V> e;
         if ((e = getNode(key)) != null) {
             V oldValue = e.value;
             e.value = value;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 574168b4620d..d167f8dbd8a6 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -276,7 +276,8 @@ public boolean add(@Growable @GuardSatisfied HashSet<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return map.remove(o)==PRESENT;
+    public boolean remove(@Shrinkable @GuardSatisfied HashSet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return map.remove(o)==PRESENT;
     }
 
     /**
@@ -285,7 +286,8 @@ public boolean add(@Growable @GuardSatisfied HashSet<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {        map.clear();
+    public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
+        map.clear();
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 32f99dae65d0..a408dd0b707c 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -417,7 +417,8 @@ void afterNodeAccess(Node<K,V> e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {        try {
+    public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
+        try {
             putMode = PUT_FIRST;
             return this.put(k, v);
         } finally {
@@ -435,7 +436,8 @@ public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putLast(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {        try {
+    public V putLast(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
+        try {
             putMode = PUT_LAST;
             return this.put(k, v);
         } finally {
@@ -590,7 +592,8 @@ public V getOrDefault(@Nullable Object key, V defaultValue) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied LinkedHashMap<K, V> this) {        super.clear();
+    public void clear(@Shrinkable @GuardSatisfied LinkedHashMap<K, V> this) {
+        super.clear();
         head = tail = null;
     }
 
@@ -1243,22 +1246,26 @@ public V get(Object key) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V put(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {            return base.put(key, value);
+        public V put(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
+            return base.put(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key) {            return base.remove(key);
+        public V remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key) {
+            return base.remove(key);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void putAll(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, Map<? extends K, ? extends V> m) {            base.putAll(m);
+        public void putAll(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, Map<? extends K, ? extends V> m) {
+            base.putAll(m);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {            base.clear();
+        public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
+            base.clear();
         }
 
         @SideEffectFree
@@ -1306,22 +1313,26 @@ public void replaceAll(@Replaceable ReversedLinkedHashMapView<K,V> this, BiFunct
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, V value) {            return base.putIfAbsent(key, value);
+        public V putIfAbsent(@Growable ReversedLinkedHashMapView<K,V> this, K key, V value) {
+            return base.putIfAbsent(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key, Object value) {            return base.remove(key, value);
+        public boolean remove(@Shrinkable ReversedLinkedHashMapView<K,V> this, Object key, Object value) {
+            return base.remove(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V oldValue, V newValue) {            return base.replace(key, oldValue, newValue);
+        public boolean replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V oldValue, V newValue) {
+            return base.replace(key, oldValue, newValue);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {            return base.replace(key, value);
+        public V replace(@Replaceable ReversedLinkedHashMapView<K,V> this, K key, V value) {
+            return base.replace(key, value);
         }
 
         @DoesNotUnrefineReceiver("modifiability")
@@ -1362,22 +1373,26 @@ public Entry<K, V> lastEntry() {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public Entry<K, V> pollFirstEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {            return base.pollLastEntry();
+        public Entry<K, V> pollFirstEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
+            return base.pollLastEntry();
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public Entry<K, V> pollLastEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {            return base.pollFirstEntry();
+        public Entry<K, V> pollLastEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
+            return base.pollFirstEntry();
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putFirst(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {            return base.putLast(k, v);
+        public V putFirst(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
+            return base.putLast(k, v);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putLast(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {            return base.putFirst(k, v);
+        public V putLast(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
+            return base.putFirst(k, v);
         }
     }
 }
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index b263b7b69b7c..3fd84ab2ead8 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -257,7 +257,8 @@ LinkedHashMap<E, Object> map() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable LinkedHashSet<E> this, E e) {        map().putFirst(e, PRESENT);
+    public void addFirst(@Growable LinkedHashSet<E> this, E e) {
+        map().putFirst(e, PRESENT);
     }
 
     /**
@@ -270,7 +271,8 @@ LinkedHashMap<E, Object> map() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable LinkedHashSet<E> this, E e) {        map().putLast(e, PRESENT);
+    public void addLast(@Growable LinkedHashSet<E> this, E e) {
+        map().putLast(e, PRESENT);
     }
 
     /**
@@ -303,7 +305,8 @@ public E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable LinkedHashSet<E> this) {        return map().sequencedKeySet().removeFirst();
+    public E removeFirst(@Shrinkable LinkedHashSet<E> this) {
+        return map().sequencedKeySet().removeFirst();
     }
 
     /**
@@ -314,7 +317,8 @@ public E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable LinkedHashSet<E> this) {        return map().sequencedKeySet().removeLast();
+    public E removeLast(@Shrinkable LinkedHashSet<E> this) {
+        return map().sequencedKeySet().removeLast();
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 5471d6e70de1..ae75c4276c7f 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -310,7 +310,8 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {        final Node<E> f = first;
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+        final Node<E> f = first;
         if (f == null)
             throw new NoSuchElementException();
         return unlinkFirst(f);
@@ -324,7 +325,8 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {        final Node<E> l = last;
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+        final Node<E> l = last;
         if (l == null)
             throw new NoSuchElementException();
         return unlinkLast(l);
@@ -337,7 +339,8 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {        linkFirst(e);
+    public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+        linkFirst(e);
     }
 
     /**
@@ -349,7 +352,8 @@ public E getLast(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable @GuardSatisfied LinkedList<E> this, E e) {        linkLast(e);
+    public void addLast(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+        linkLast(e);
     }
 
     /**
@@ -389,7 +393,8 @@ public boolean contains(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nul
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied LinkedList<E> this, E e) {        linkLast(e);
+    public boolean add(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+        linkLast(e);
         return true;
     }
 
@@ -409,7 +414,8 @@ public boolean contains(@GuardSatisfied LinkedList<E> this, @GuardSatisfied @Nul
     @ReleasesNoLocks
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o == null) {
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o == null) {
             for (Node<E> x = first; x != null; x = x.next) {
                 if (x.item == null) {
                     unlink(x);
@@ -441,7 +447,8 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this,
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, Collection<? extends E> c) {        return addAll(size, c);
+    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, Collection<? extends E> c) {
+        return addAll(size, c);
     }
 
     /**
@@ -461,7 +468,8 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this,
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, Collection<? extends E> c) {        checkPositionIndex(index);
+    public boolean addAll(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, Collection<? extends E> c) {
+        checkPositionIndex(index);
 
         Object[] a = c.toArray();
         int numNew = a.length;
@@ -505,7 +513,8 @@ public boolean remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this,
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {        // Clearing all of the links between nodes is "unnecessary", but:
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
+        // Clearing all of the links between nodes is "unnecessary", but:
         // - helps a generational GC if the discarded nodes inhabit
         //   more than one generation
         // - is sure to free memory even if there is a reachable Iterator
@@ -548,7 +557,8 @@ public E get(@GuardSatisfied LinkedList<E> this, @NonNegative int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {        checkElementIndex(index);
+    public E set(@Replaceable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
+        checkElementIndex(index);
         Node<E> x = node(index);
         E oldVal = x.item;
         x.item = element;
@@ -566,7 +576,8 @@ public E get(@GuardSatisfied LinkedList<E> this, @NonNegative int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {        checkPositionIndex(index);
+    public void add(@Growable @GuardSatisfied LinkedList<E> this, @NonNegative int index, E element) {
+        checkPositionIndex(index);
 
         if (index == size)
             linkLast(element);
@@ -585,7 +596,8 @@ public E get(@GuardSatisfied LinkedList<E> this, @NonNegative int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @NonNegative int index) {        checkElementIndex(index);
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @NonNegative int index) {
+        checkElementIndex(index);
         return unlink(node(index));
     }
 
@@ -740,7 +752,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {        final Node<E> f = first;
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
+        final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
     }
 
@@ -753,7 +766,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {        return removeFirst();
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+        return removeFirst();
     }
 
     /**
@@ -765,7 +779,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable LinkedList<E> this, E e) {        return add(e);
+    public boolean offer(@Growable LinkedList<E> this, E e) {
+        return add(e);
     }
 
     // Deque operations
@@ -778,7 +793,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable LinkedList<E> this, E e) {        addFirst(e);
+    public boolean offerFirst(@Growable LinkedList<E> this, E e) {
+        addFirst(e);
         return true;
     }
 
@@ -791,7 +807,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable LinkedList<E> this, E e) {        addLast(e);
+    public boolean offerLast(@Growable LinkedList<E> this, E e) {
+        addLast(e);
         return true;
     }
 
@@ -833,7 +850,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {        final Node<E> f = first;
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
+        final Node<E> f = first;
         return (f == null) ? null : unlinkFirst(f);
     }
 
@@ -847,7 +865,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {        final Node<E> l = last;
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this) {
+        final Node<E> l = last;
         return (l == null) ? null : unlinkLast(l);
     }
 
@@ -862,7 +881,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {        addFirst(e);
+    public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+        addFirst(e);
     }
 
     /**
@@ -878,7 +898,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {        return removeFirst();
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<E> this) {
+        return removeFirst();
     }
 
     /**
@@ -892,7 +913,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return remove(o);
+    public boolean removeFirstOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return remove(o);
     }
 
     /**
@@ -906,7 +928,8 @@ public E element(@GuardSatisfied @NonEmpty LinkedList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o == null) {
+    public boolean removeLastOccurrence(@Shrinkable @GuardSatisfied @CanShrink LinkedList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o == null) {
             for (Node<E> x = last; x != null; x = x.prev) {
                 if (x.item == null) {
                     unlink(x);
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 6b6c432f8734..e35ceacea9c7 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -365,7 +365,8 @@ public interface NavigableSet<E> extends SortedSet<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@Shrinkable NavigableSet<E> this) {        if (this.isEmpty()) {
+    default E removeFirst(@Shrinkable NavigableSet<E> this) {
+        if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
             return this.pollFirst();
@@ -385,7 +386,8 @@ default E removeFirst(@Shrinkable NavigableSet<E> this) {        if (this.isEmpt
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@Shrinkable NavigableSet<E> this) {        if (this.isEmpty()) {
+    default E removeLast(@Shrinkable NavigableSet<E> this) {
+        if (this.isEmpty()) {
             throw new NoSuchElementException();
         } else {
             return this.pollLast();
@@ -406,6 +408,7 @@ default E removeLast(@Shrinkable NavigableSet<E> this) {        if (this.isEmpty
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyModifiable NavigableSet<E> reversed(@PolyModifiable NavigableSet<E> this) {        return this.descendingSet();
+    default @PolyModifiable NavigableSet<E> reversed(@PolyModifiable NavigableSet<E> this) {
+        return this.descendingSet();
     }
 }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index f0d16353da49..a8f088627ccb 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -1379,25 +1379,29 @@ public boolean containsKey(@GuardSatisfied @Nullable @UnknownSignedness Object k
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object put(@Growable @Replaceable Properties this, Object key, Object value) {        return map.put(key, value);
+    public synchronized Object put(@Growable @Replaceable Properties this, Object key, Object value) {
+        return map.put(key, value);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        return map.remove(key);
+    public synchronized Object remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        return map.remove(key);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void putAll(@Growable @Replaceable Properties this, Map<?, ?> t) {        map.putAll(t);
+    public synchronized void putAll(@Growable @Replaceable Properties this, Map<?, ?> t) {
+        map.putAll(t);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void clear(@Shrinkable Properties this) {        map.clear();
+    public synchronized void clear(@Shrinkable Properties this) {
+        map.clear();
     }
 
     @Override
@@ -1542,25 +1546,29 @@ public synchronized void replaceAll(@Replaceable Properties this, BiFunction<? s
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object putIfAbsent(@Growable Properties this, Object key, Object value) {        return map.putIfAbsent(key, value);
+    public synchronized Object putIfAbsent(@Growable Properties this, Object key, Object value) {
+        return map.putIfAbsent(key, value);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {        return map.remove(key, value);
+    public synchronized boolean remove(@Shrinkable Properties this, @GuardSatisfied @Nullable @UnknownSignedness Object key, @GuardSatisfied @Nullable @UnknownSignedness Object value) {
+        return map.remove(key, value);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean replace(@Replaceable Properties this, Object key, Object oldValue, Object newValue) {        return map.replace(key, oldValue, newValue);
+    public synchronized boolean replace(@Replaceable Properties this, Object key, Object oldValue, Object newValue) {
+        return map.replace(key, oldValue, newValue);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized Object replace(@Replaceable Properties this, Object key, Object value) {        return map.replace(key, value);
+    public synchronized Object replace(@Replaceable Properties this, Object key, Object value) {
+        return map.replace(key, value);
     }
 
     @Override
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index e38c0ba685eb..8c01a694261f 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -357,6 +357,7 @@ default V putLast(K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyModifiable SortedMap<K, V> reversed(@PolyModifiable SortedMap<K, V> this) {        return ReverseOrderSortedMapView.of(this);
+    default @PolyModifiable SortedMap<K, V> reversed(@PolyModifiable SortedMap<K, V> this) {
+        return ReverseOrderSortedMapView.of(this);
     }
 }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 9592f52d3747..65a87c793afd 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -364,7 +364,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@Shrinkable SortedSet<E> this) {        E e = this.first();
+    default E removeFirst(@Shrinkable SortedSet<E> this) {
+        E e = this.first();
         this.remove(e);
         return e;
     }
@@ -383,7 +384,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@Shrinkable SortedSet<E> this) {        E e = this.last();
+    default E removeLast(@Shrinkable SortedSet<E> this) {
+        E e = this.last();
         this.remove(e);
         return e;
     }
@@ -400,6 +402,7 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyModifiable SortedSet<E> reversed(@PolyModifiable SortedSet<E> this) {        return ReverseOrderSortedSetView.of(this);
+    default @PolyModifiable SortedSet<E> reversed(@PolyModifiable SortedSet<E> this) {
+        return ReverseOrderSortedSetView.of(this);
     }
 }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 5ffe51387413..0a63820cadd0 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -391,7 +391,8 @@ public V putLast(K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, Map<? extends K, ? extends V> map) {        int mapSize = map.size();
+    public void putAll(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, Map<? extends K, ? extends V> map) {
+        int mapSize = map.size();
         if (size==0 && mapSize!=0 && map instanceof SortedMap) {
             if (Objects.equals(comparator, ((SortedMap<?,?>)map).comparator())) {
                 ++modCount;
@@ -613,13 +614,15 @@ final Entry<K,V> getLowerEntry(K key) {
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, K key, V value) {        return put(key, value, true);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied TreeMap<K, V> this, K key, V value) {
+        return put(key, value, true);
     }
 
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putIfAbsent(@Growable TreeMap<K,V> this, K key, V value) {        return put(key, value, false);
+    public V putIfAbsent(@Growable TreeMap<K,V> this, K key, V value) {
+        return put(key, value, false);
     }
 
     /**
@@ -966,7 +969,8 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {        Entry<K,V> p = getEntry(key);
+    public @Nullable V remove(@Shrinkable @GuardSatisfied TreeMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        Entry<K,V> p = getEntry(key);
         if (p == null)
             return null;
 
@@ -981,7 +985,8 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {        modCount++;
+    public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
+        modCount++;
         size = 0;
         root = null;
     }
@@ -1041,7 +1046,8 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {        Entry<K,V> p = getFirstEntry();
+    public Map.@Nullable Entry<K,V> pollFirstEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
+        Entry<K,V> p = getFirstEntry();
         Map.Entry<K,V> result = exportEntry(p);
         if (p != null)
             deleteEntry(p);
@@ -1053,7 +1059,8 @@ private V mergeValue(Entry<K,V> t, V value, BiFunction<? super V, ? super V, ? e
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {        Entry<K,V> p = getLastEntry();
+    public Map.@Nullable Entry<K,V> pollLastEntry(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
+        Entry<K,V> p = getLastEntry();
         Map.Entry<K,V> result = exportEntry(p);
         if (p != null)
             deleteEntry(p);
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 463e1b2626c9..7a5118578793 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -227,7 +227,8 @@ public class TreeSet<E> extends AbstractSet<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable TreeSet<E> this) {        return new TreeSet<>(m.descendingMap());
+    public @PolyModifiable NavigableSet<E> descendingSet(@PolyModifiable TreeSet<E> this) {
+        return new TreeSet<>(m.descendingMap());
     }
 
     /**
@@ -292,7 +293,8 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied TreeSet<E> this, E e) {        return m.put(e, PRESENT)==null;
+    public boolean add(@Growable @GuardSatisfied TreeSet<E> this, E e) {
+        return m.put(e, PRESENT)==null;
     }
 
     /**
@@ -314,7 +316,8 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {        return m.remove(o)==PRESENT;
+    public boolean remove(@Shrinkable @GuardSatisfied TreeSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        return m.remove(o)==PRESENT;
     }
 
     /**
@@ -323,7 +326,8 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied TreeSet<E> this) {        m.clear();
+    public void clear(@Shrinkable @GuardSatisfied TreeSet<E> this) {
+        m.clear();
     }
 
     /**
@@ -339,7 +343,8 @@ public boolean contains(@GuardSatisfied TreeSet<E> this, @GuardSatisfied @Unknow
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? extends E> c) {        // Use linear-time version if applicable
+    public  boolean addAll(@Growable @GuardSatisfied TreeSet<E> this, Collection<? extends E> c) {
+        // Use linear-time version if applicable
         if (m.size()==0 && c.size() > 0 &&
             c instanceof SortedSet &&
                 m instanceof TreeMap<E, Object> map) {
@@ -505,7 +510,8 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied TreeSet<E> this) {        Map.Entry<E,?> e = m.pollFirstEntry();
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied TreeSet<E> this) {
+        Map.Entry<E,?> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
     }
 
@@ -514,7 +520,8 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable @GuardSatisfied TreeSet<E> this) {        Map.Entry<E,?> e = m.pollLastEntry();
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied TreeSet<E> this) {
+        Map.Entry<E,?> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
     }
 
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 2c70af8209b6..3c179f7713e5 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -566,7 +566,8 @@ public synchronized E lastElement(@NonEmpty Vector<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {        if (index >= elementCount) {
+    public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
+        if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
                                                      elementCount);
         }
@@ -594,7 +595,8 @@ public synchronized void setElementAt(@Replaceable @GuardSatisfied Vector<E> thi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void removeElementAt(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {        if (index >= elementCount) {
+    public synchronized void removeElementAt(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
+        if (index >= elementCount) {
             throw new ArrayIndexOutOfBoundsException(index + " >= " +
                                                      elementCount);
         }
@@ -635,7 +637,8 @@ else if (index < 0) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {        if (index > elementCount) {
+    public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> this, E obj, @NonNegative int index) {
+        if (index > elementCount) {
             throw new ArrayIndexOutOfBoundsException(index
                                                      + " > " + elementCount);
         }
@@ -664,7 +667,8 @@ public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> thi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void addElement(@Growable @GuardSatisfied Vector<E> this, E obj) {        modCount++;
+    public synchronized void addElement(@Growable @GuardSatisfied Vector<E> this, E obj) {
+        modCount++;
         add(obj, elementData, elementCount);
     }
 
@@ -685,7 +689,8 @@ public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> thi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean removeElement(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Object obj) {        modCount++;
+    public synchronized boolean removeElement(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Object obj) {
+        modCount++;
         int i = indexOf(obj);
         if (i >= 0) {
             removeElementAt(i);
@@ -702,7 +707,8 @@ public synchronized void insertElementAt(@Growable @GuardSatisfied Vector<E> thi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {        final Object[] es = elementData;
+    public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
+        final Object[] es = elementData;
         for (int to = elementCount, i = elementCount = 0; i < to; i++)
             es[i] = null;
         modCount++;
@@ -822,7 +828,8 @@ public synchronized E get(@GuardSatisfied Vector<E> this, @NonNegative int index
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized E set(@Replaceable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {        if (index >= elementCount)
+    public synchronized E set(@Replaceable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
+        if (index >= elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
 
         E oldValue = elementData(index);
@@ -853,7 +860,8 @@ private void add(E e, Object[] elementData, int s) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean add(@Growable @GuardSatisfied Vector<E> this, E e) {        modCount++;
+    public synchronized boolean add(@Growable @GuardSatisfied Vector<E> this, E e) {
+        modCount++;
         add(e, elementData, elementCount);
         return true;
     }
@@ -871,7 +879,8 @@ private void add(E e, Object[] elementData, int s) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return removeElement(o);
+    public boolean remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return removeElement(o);
     }
 
     /**
@@ -887,7 +896,8 @@ private void add(E e, Object[] elementData, int s) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {        insertElementAt(element, index);
+    public void add(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, E element) {
+        insertElementAt(element, index);
     }
 
     /**
@@ -903,7 +913,8 @@ private void add(E e, Object[] elementData, int s) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized E remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {        modCount++;
+    public synchronized E remove(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, @NonNegative int index) {
+        modCount++;
         if (index >= elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
         E oldValue = elementData(index);
@@ -925,7 +936,8 @@ private void add(E e, Object[] elementData, int s) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {        removeAllElements();
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this) {
+        removeAllElements();
     }
 
     // Bulk Operations
@@ -960,7 +972,8 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied Vector<E> this, Collection<? extends E> c) {        Object[] a = c.toArray();
+    public boolean addAll(@Growable @GuardSatisfied Vector<E> this, Collection<? extends E> c) {
+        Object[] a = c.toArray();
         modCount++;
         int numNew = a.length;
         if (numNew == 0)
@@ -995,7 +1008,8 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1020,7 +1034,8 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
@@ -1031,7 +1046,8 @@ public synchronized boolean containsAll(@GuardSatisfied Vector<E> this, @GuardSa
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink Vector<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink Vector<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1101,7 +1117,8 @@ private synchronized boolean bulkRemove(Predicate<? super E> filter) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean addAll(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, Collection<? extends E> c) {        if (index < 0 || index > elementCount)
+    public synchronized boolean addAll(@Growable @GuardSatisfied Vector<E> this, @NonNegative int index, Collection<? extends E> c) {
+        if (index < 0 || index > elementCount)
             throw new ArrayIndexOutOfBoundsException(index);
 
         Object[] a = c.toArray();
@@ -1207,7 +1224,8 @@ public synchronized String toString(@GuardSatisfied Vector<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    protected synchronized void removeRange(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, int fromIndex, int toIndex) {        modCount++;
+    protected synchronized void removeRange(@Shrinkable @GuardSatisfied @CanShrink Vector<E> this, int fromIndex, int toIndex) {
+        modCount++;
         shiftTailOverGap(elementData, fromIndex, toIndex);
     }
 
@@ -1476,7 +1494,8 @@ public synchronized void replaceAll(@Replaceable Vector<E> this, UnaryOperator<E
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void sort(@Replaceable Vector<E> this, Comparator<? super E> c) {        final int expectedModCount = modCount;
+    public synchronized void sort(@Replaceable Vector<E> this, Comparator<? super E> c) {
+        final int expectedModCount = modCount;
         Arrays.sort((E[]) elementData, 0, elementCount, c);
         if (modCount != expectedModCount)
             throw new ConcurrentModificationException();
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index d01d1aefb453..30805f80ef26 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -353,7 +353,8 @@ void removeAt(final int removeIndex) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable ArrayBlockingQueue<E> this, E e) {        return super.add(e);
+    public boolean add(@Growable ArrayBlockingQueue<E> this, E e) {
+        return super.add(e);
     }
 
     /**
@@ -367,7 +368,8 @@ void removeAt(final int removeIndex) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable ArrayBlockingQueue<E> this, E e) {        Objects.requireNonNull(e);
+    public boolean offer(@Growable ArrayBlockingQueue<E> this, E e) {
+        Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -391,7 +393,8 @@ void removeAt(final int removeIndex) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable ArrayBlockingQueue<E> this, E e) throws InterruptedException {        Objects.requireNonNull(e);
+    public void put(@Growable ArrayBlockingQueue<E> this, E e) throws InterruptedException {
+        Objects.requireNonNull(e);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
@@ -434,7 +437,8 @@ public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, Ti
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             return (count == 0) ? null : dequeue();
@@ -445,7 +449,8 @@ public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, Ti
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws InterruptedException {        final ReentrantLock lock = this.lock;
+    public E take(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) throws InterruptedException {
+        final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
             while (count == 0)
@@ -458,7 +463,8 @@ public boolean offer(@Growable ArrayBlockingQueue<E> this, E e, long timeout, Ti
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        long nanos = unit.toNanos(timeout);
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
@@ -544,7 +550,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o == null) return false;
+    public boolean remove(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -698,7 +705,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             int k;
@@ -738,7 +746,8 @@ private static void circularClear(Object[] items, int i, int end) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {        return drainTo(c, Integer.MAX_VALUE);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c) {
+        return drainTo(c, Integer.MAX_VALUE);
     }
 
     /**
@@ -749,7 +758,8 @@ private static void circularClear(Object[] items, int i, int end) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         if (maxElements <= 0)
@@ -1521,7 +1531,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1530,7 +1541,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1539,7 +1551,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ArrayBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 9627a1ce7e31..2d7d2a4eb368 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -1049,7 +1049,8 @@ public boolean containsValue(@GuardSatisfied @UnknownSignedness Object value) {
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable ConcurrentHashMap<K,V> this, K key, V value) {        return putVal(key, value, false);
+    public @Nullable V put(@Growable @Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
+        return putVal(key, value, false);
     }
 
     /** Implementation for put and putIfAbsent */
@@ -1131,7 +1132,8 @@ else if (f instanceof ReservationNode)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable ConcurrentHashMap<K,V> this, Map<? extends K, ? extends V> m) {        tryPresize(m.size());
+    public void putAll(@Growable @Replaceable ConcurrentHashMap<K,V> this, Map<? extends K, ? extends V> m) {
+        tryPresize(m.size());
         for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             putVal(e.getKey(), e.getValue(), false);
     }
@@ -1147,7 +1149,8 @@ else if (f instanceof ReservationNode)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {        return replaceNode(key, null, null);
+    public @Nullable V remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        return replaceNode(key, null, null);
     }
 
     /**
@@ -1233,7 +1236,8 @@ else if (f instanceof ReservationNode)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable ConcurrentHashMap<K,V> this) {        long delta = 0L; // negative number of deletions
+    public void clear(@Shrinkable ConcurrentHashMap<K,V> this) {
+        long delta = 0L; // negative number of deletions
         int i = 0;
         Node<K,V>[] tab = table;
         while (tab != null && i < tab.length) {
@@ -1596,7 +1600,8 @@ private void readObject(java.io.ObjectInputStream s)
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V putIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, V value) {        return putVal(key, value, true);
+    public @Nullable V putIfAbsent(@Growable ConcurrentHashMap<K,V> this, K key, V value) {
+        return putVal(key, value, true);
     }
 
     /**
@@ -1606,7 +1611,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        if (key == null)
+    public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        if (key == null)
             throw new NullPointerException();
         return value != null && replaceNode(key, null, value) != null;
     }
@@ -1618,7 +1624,8 @@ public boolean remove(@Shrinkable ConcurrentHashMap<K,V> this, @GuardSatisfied @
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldValue, V newValue) {        if (key == null || oldValue == null || newValue == null)
+    public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldValue, V newValue) {
+        if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
         return replaceNode(key, newValue, oldValue) != null;
     }
@@ -1632,7 +1639,8 @@ public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldVal
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V value) {        if (key == null || value == null)
+    public @Nullable V replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V value) {
+        if (key == null || value == null)
             throw new NullPointerException();
         return replaceNode(key, value, null);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 112146f5a7de..5d07aa30b6b7 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -851,7 +851,8 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {        linkFirst(e);
+    public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        linkFirst(e);
     }
 
     /**
@@ -865,7 +866,8 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {        linkLast(e);
+    public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        linkLast(e);
     }
 
     /**
@@ -877,7 +879,8 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {        linkFirst(e);
+    public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        linkFirst(e);
         return true;
     }
 
@@ -892,7 +895,8 @@ private void initHeadTail(Node<E> h, Node<E> t) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {        linkLast(e);
+    public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        linkLast(e);
         return true;
     }
 
@@ -946,7 +950,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {        restart: for (;;) {
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+        restart: for (;;) {
             for (Node<E> first = first(), p = first;;) {
                 final E item;
                 if ((item = p.item) != null) {
@@ -968,7 +973,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {        restart: for (;;) {
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+        restart: for (;;) {
             for (Node<E> last = last(), p = last;;) {
                 final E item;
                 if ((item = p.item) != null) {
@@ -993,7 +999,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {        return screenNullResult(pollFirst());
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
+        return screenNullResult(pollFirst());
     }
 
     /**
@@ -1001,7 +1008,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {        return screenNullResult(pollLast());
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this) {
+        return screenNullResult(pollLast());
     }
 
     // *** Queue and stack methods ***
@@ -1015,7 +1023,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable ConcurrentLinkedDeque<E> this, E e) {        return offerLast(e);
+    public boolean offer(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        return offerLast(e);
     }
 
     /**
@@ -1029,7 +1038,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {        return offerLast(e);
+    public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
+        return offerLast(e);
     }
 
     // @SideEffectsOnly("this")
@@ -1075,7 +1085,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeFirstOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {        Objects.requireNonNull(o);
+    public boolean removeFirstOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
+        Objects.requireNonNull(o);
         for (Node<E> p = first(); p != null; p = succ(p)) {
             final E item;
             if ((item = p.item) != null
@@ -1102,7 +1113,8 @@ public E getLast(@NonEmpty ConcurrentLinkedDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeLastOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {        Objects.requireNonNull(o);
+    public boolean removeLastOccurrence(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Object o) {
+        Objects.requireNonNull(o);
         for (Node<E> p = last(); p != null; p = pred(p)) {
             final E item;
             if ((item = p.item) != null
@@ -1195,7 +1207,8 @@ public int size() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied @UnknownSignedness Object o) {        return removeFirstOccurrence(o);
+    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        return removeFirstOccurrence(o);
     }
 
     /**
@@ -1212,7 +1225,8 @@ public int size() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable ConcurrentLinkedDeque<E> this, Collection<? extends E> c) {        if (c == this)
+    public boolean addAll(@Growable ConcurrentLinkedDeque<E> this, Collection<? extends E> c) {
+        if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
 
@@ -1267,7 +1281,8 @@ else if (p.prev == p) // NEXT_TERMINATOR
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {        while (pollFirst() != null)
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this) {
+        while (pollFirst() != null)
             ;
     }
 
@@ -1674,7 +1689,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1683,7 +1699,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1692,7 +1709,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index dfc226e3a044..9aef3f354e55 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -307,7 +307,8 @@ boolean casItem(E cmp, E val) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable ConcurrentLinkedQueue<E> this, E e) {        return offer(e);
+    public boolean add(@Growable ConcurrentLinkedQueue<E> this, E e) {
+        return offer(e);
     }
 
     /**
@@ -380,7 +381,8 @@ private Node<E> skipDeadNodes(Node<E> pred, Node<E> c, Node<E> p, Node<E> q) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable ConcurrentLinkedQueue<E> this, E e) {        final Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
+    public boolean offer(@Growable ConcurrentLinkedQueue<E> this, E e) {
+        final Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
 
         for (Node<E> t = tail, p = t;;) {
             Node<E> q = p.next;
@@ -410,7 +412,8 @@ else if (p == q)
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {        restartFromHead: for (;;) {
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
+        restartFromHead: for (;;) {
             for (Node<E> h = head, p = h, q;; p = q) {
                 final E item;
                 if ((item = p.item) != null && p.casItem(item, null)) {
@@ -555,7 +558,8 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied @UnknownSignedness Object o) {        if (o == null) return false;
+    public boolean remove(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        if (o == null) return false;
         restartFromHead: for (;;) {
             for (Node<E> p = head, pred = null; p != null; ) {
                 Node<E> q = p.next;
@@ -592,7 +596,8 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable ConcurrentLinkedQueue<E> this, Collection<? extends E> c) {        if (c == this)
+    public boolean addAll(@Growable ConcurrentLinkedQueue<E> this, Collection<? extends E> c) {
+        if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
 
@@ -1008,7 +1013,8 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1017,7 +1023,8 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1026,13 +1033,15 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {        bulkRemove(e -> true);
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink ConcurrentLinkedQueue<E> this) {
+        bulkRemove(e -> true);
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index fb395ba607d0..2932967cdcb6 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -1374,7 +1374,8 @@ public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultVa
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {        if (value == null)
+    public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
+        if (value == null)
             throw new NullPointerException();
         return doPut(key, value, false);
     }
@@ -1391,7 +1392,8 @@ public V put(@Growable @Replaceable ConcurrentSkipListMap<K,V> this, K key, V va
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {        return doRemove(key, null);
+    public V remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        return doRemove(key, null);
     }
 
     /**
@@ -1447,7 +1449,8 @@ public boolean isEmpty() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable ConcurrentSkipListMap<K,V> this) {        Index<K,V> h, r, d; Node<K,V> b;
+    public void clear(@Shrinkable ConcurrentSkipListMap<K,V> this) {
+        Index<K,V> h, r, d; Node<K,V> b;
         VarHandle.acquireFence();
         while ((h = head) != null) {
             if ((r = h.right) != null)        // remove indices
@@ -1833,7 +1836,8 @@ public boolean equals(@Nullable Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value) {        if (value == null)
+    public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value) {
+        if (value == null)
             throw new NullPointerException();
         return doPut(key, value, true);
     }
@@ -1847,7 +1851,8 @@ public V putIfAbsent(@Growable ConcurrentSkipListMap<K,V> this, K key, V value)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        if (key == null)
+    public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        if (key == null)
             throw new NullPointerException();
         return value != null && doRemove(key, value) != null;
     }
@@ -1861,7 +1866,8 @@ public boolean remove(@Shrinkable ConcurrentSkipListMap<K,V> this, @GuardSatisfi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V oldValue, V newValue) {        if (key == null || oldValue == null || newValue == null)
+    public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V oldValue, V newValue) {
+        if (key == null || oldValue == null || newValue == null)
             throw new NullPointerException();
         for (;;) {
             Node<K,V> n; V v;
@@ -1887,7 +1893,8 @@ public boolean replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V ol
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {        if (key == null || value == null)
+    public V replace(@Replaceable ConcurrentSkipListMap<K,V> this, K key, V value) {
+        if (key == null || value == null)
             throw new NullPointerException();
         for (;;) {
             Node<K,V> n; V v;
@@ -2163,7 +2170,8 @@ public K higherKey(K key) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public Map.@Unmodifiable Entry<K,V> pollFirstEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {        return doRemoveFirstEntry();
+    public Map.@Unmodifiable Entry<K,V> pollFirstEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
+        return doRemoveFirstEntry();
     }
 
     /**
@@ -2174,7 +2182,8 @@ public K higherKey(K key) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public Map.@Unmodifiable Entry<K,V> pollLastEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {        return doRemoveLastEntry();
+    public Map.@Unmodifiable Entry<K,V> pollLastEntry(@Shrinkable ConcurrentSkipListMap<K,V> this) {
+        return doRemoveLastEntry();
     }
 
     /* ---------------- Iterators -------------- */
@@ -2800,13 +2809,15 @@ public V get(Object key) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V put(@Growable @Replaceable SubMap<K,V> this, K key, V value) {            checkKeyBounds(key, m.comparator);
+        public V put(@Growable @Replaceable SubMap<K,V> this, K key, V value) {
+            checkKeyBounds(key, m.comparator);
             return m.put(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V remove(@Shrinkable SubMap<K,V> this, Object key) {            return (!inBounds(key, m.comparator)) ? null : m.remove(key);
+        public V remove(@Shrinkable SubMap<K,V> this, Object key) {
+            return (!inBounds(key, m.comparator)) ? null : m.remove(key);
         }
 
         @Pure
@@ -2846,7 +2857,8 @@ public boolean containsValue(@UnknownSignedness Object value) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void clear(@Shrinkable SubMap<K,V> this) {            Comparator<? super K> cmp = m.comparator;
+        public void clear(@Shrinkable SubMap<K,V> this) {
+            Comparator<? super K> cmp = m.comparator;
             for (ConcurrentSkipListMap.Node<K,V> n = loNode(cmp);
                  isBeforeEnd(n, cmp);
                  n = n.next) {
@@ -2859,24 +2871,28 @@ public boolean containsValue(@UnknownSignedness Object value) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putIfAbsent(@Growable SubMap<K,V> this, K key, V value) {            checkKeyBounds(key, m.comparator);
+        public V putIfAbsent(@Growable SubMap<K,V> this, K key, V value) {
+            checkKeyBounds(key, m.comparator);
             return m.putIfAbsent(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean remove(@Shrinkable SubMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value) {            return inBounds(key, m.comparator) && m.remove(key, value);
+        public boolean remove(@Shrinkable SubMap<K,V> this, @UnknownSignedness Object key, @UnknownSignedness Object value) {
+            return inBounds(key, m.comparator) && m.remove(key, value);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean replace(@Replaceable SubMap<K,V> this, K key, V oldValue, V newValue) {            checkKeyBounds(key, m.comparator);
+        public boolean replace(@Replaceable SubMap<K,V> this, K key, V oldValue, V newValue) {
+            checkKeyBounds(key, m.comparator);
             return m.replace(key, oldValue, newValue);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V replace(@Replaceable SubMap<K,V> this, K key, V value) {            checkKeyBounds(key, m.comparator);
+        public V replace(@Replaceable SubMap<K,V> this, K key, V value) {
+            checkKeyBounds(key, m.comparator);
             return m.replace(key, value);
         }
 
@@ -3039,12 +3055,14 @@ public Map.Entry<K,V> lastEntry() {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public Map.Entry<K,V> pollFirstEntry(@Shrinkable SubMap<K,V> this) {            return isDescending ? removeHighest() : removeLowest();
+        public Map.Entry<K,V> pollFirstEntry(@Shrinkable SubMap<K,V> this) {
+            return isDescending ? removeHighest() : removeLowest();
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {            return isDescending ? removeLowest() : removeHighest();
+        public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
+            return isDescending ? removeLowest() : removeHighest();
         }
 
         /* ---------------- Submap Views -------------- */
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 169533365951..ec652df20b05 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -270,7 +270,8 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable ConcurrentSkipListSet<E> this, E e) {        return m.putIfAbsent(e, Boolean.TRUE) == null;
+    public boolean add(@Growable ConcurrentSkipListSet<E> this, E e) {
+        return m.putIfAbsent(e, Boolean.TRUE) == null;
     }
 
     /**
@@ -289,7 +290,8 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable ConcurrentSkipListSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {        return m.remove(o, Boolean.TRUE);
+    public boolean remove(@Shrinkable ConcurrentSkipListSet<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        return m.remove(o, Boolean.TRUE);
     }
 
     /**
@@ -297,7 +299,8 @@ public boolean contains(@GuardSatisfied @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {        m.clear();
+    public void clear(@Shrinkable ConcurrentSkipListSet<E> this) {
+        m.clear();
     }
 
     /**
@@ -366,7 +369,8 @@ public boolean equals(@Nullable Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable ConcurrentSkipListSet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        // Override AbstractSet version to avoid unnecessary call to size()
+    public boolean removeAll(@Shrinkable ConcurrentSkipListSet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        // Override AbstractSet version to avoid unnecessary call to size()
         boolean modified = false;
         for (Object e : c)
             if (remove(e))
@@ -414,13 +418,15 @@ public E higher(E e) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable ConcurrentSkipListSet<E> this) {        Map.Entry<E,Object> e = m.pollFirstEntry();
+    public @Nullable E pollFirst(@Shrinkable ConcurrentSkipListSet<E> this) {
+        Map.Entry<E,Object> e = m.pollFirstEntry();
         return (e == null) ? null : e.getKey();
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable ConcurrentSkipListSet<E> this) {        Map.Entry<E,Object> e = m.pollLastEntry();
+    public @Nullable E pollLast(@Shrinkable ConcurrentSkipListSet<E> this) {
+        Map.Entry<E,Object> e = m.pollLastEntry();
         return (e == null) ? null : e.getKey();
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
index d61be52e08a3..f0eaf32c0789 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArraySet.java
@@ -256,7 +256,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable CopyOnWriteArraySet<E> this) {        al.clear();
+    public void clear(@Shrinkable CopyOnWriteArraySet<E> this) {
+        al.clear();
     }
 
     /**
@@ -272,7 +273,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable CopyOnWriteArraySet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return al.remove(o);
+    public boolean remove(@Shrinkable CopyOnWriteArraySet<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return al.remove(o);
     }
 
     /**
@@ -290,7 +292,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable CopyOnWriteArraySet<E> this, E e) {        return al.addIfAbsent(e);
+    public boolean add(@Growable CopyOnWriteArraySet<E> this, E e) {
+        return al.addIfAbsent(e);
     }
 
     /**
@@ -361,7 +364,8 @@ private static int compareSets(Object[] snapshot, Set<?> set) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable CopyOnWriteArraySet<E> this, Collection<? extends E> c) {        return al.addAllAbsent(c) > 0;
+    public boolean addAll(@Growable CopyOnWriteArraySet<E> this, Collection<? extends E> c) {
+        return al.addAllAbsent(c) > 0;
     }
 
     /**
@@ -383,7 +387,8 @@ private static int compareSets(Object[] snapshot, Set<?> set) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        return al.removeAll(c);
+    public boolean removeAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        return al.removeAll(c);
     }
 
     /**
@@ -407,7 +412,8 @@ private static int compareSets(Object[] snapshot, Set<?> set) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        return al.retainAll(c);
+    public boolean retainAll(@Shrinkable CopyOnWriteArraySet<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        return al.retainAll(c);
     }
 
     /**
@@ -455,7 +461,8 @@ public boolean equals(@Nullable Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable CopyOnWriteArraySet<E> this, Predicate<? super E> filter) {        return al.removeIf(filter);
+    public boolean removeIf(@Shrinkable CopyOnWriteArraySet<E> this, Predicate<? super E> filter) {
+        return al.removeIf(filter);
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 480809be98ff..e02f4ed24a93 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -179,7 +179,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable DelayQueue<E> this, E e) {        return offer(e);
+    public boolean add(@Growable DelayQueue<E> this, E e) {
+        return offer(e);
     }
 
     /**
@@ -191,7 +192,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable DelayQueue<E> this, E e) {        final ReentrantLock lock = this.lock;
+    public boolean offer(@Growable DelayQueue<E> this, E e) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             q.offer(e);
@@ -214,7 +216,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable DelayQueue<E> this, E e) {        offer(e);
+    public void put(@Growable DelayQueue<E> this, E e) {
+        offer(e);
     }
 
     /**
@@ -229,7 +232,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit unit) {        return offer(e);
+    public boolean offer(@Growable DelayQueue<E> this, E e, long timeout, TimeUnit unit) {
+        return offer(e);
     }
 
     /**
@@ -242,7 +246,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             E first = q.peek();
@@ -264,7 +269,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedException {        final ReentrantLock lock = this.lock;
+    public E take(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) throws InterruptedException {
+        final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
             for (;;) {
@@ -310,7 +316,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        long nanos = unit.toNanos(timeout);
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         try {
@@ -361,7 +368,8 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable DelayQueue<E> this) {        return super.remove();
+    public E remove(@Shrinkable DelayQueue<E> this) {
+        return super.remove();
     }
 
     /**
@@ -403,7 +411,8 @@ public int size() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {        return drainTo(c, Integer.MAX_VALUE);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c) {
+        return drainTo(c, Integer.MAX_VALUE);
     }
 
     /**
@@ -414,7 +423,8 @@ public int size() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         if (maxElements <= 0)
@@ -445,7 +455,8 @@ public int size() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink DelayQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             q.clear();
@@ -539,7 +550,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink DelayQueue<E> this, @UnknownSignedness Object o) {        final ReentrantLock lock = this.lock;
+    public boolean remove(@Shrinkable @CanShrink DelayQueue<E> this, @UnknownSignedness Object o) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             return q.remove(o);
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index c2afbc848d3a..f6802807ec18 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -341,7 +341,8 @@ void unlink(@CanShrink LinkedBlockingDeque<E> this, Node<E> x) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {        if (!offerFirst(e))
+    public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
+        if (!offerFirst(e))
             throw new IllegalStateException("Deque full");
     }
 
@@ -351,7 +352,8 @@ public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {        if (!o
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (!offerLast(e))
+    public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
+        if (!offerLast(e))
             throw new IllegalStateException("Deque full");
     }
 
@@ -360,7 +362,8 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (!of
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {        if (e == null) throw new NullPointerException();
+    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
+        if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -376,7 +379,8 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (!of
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (e == null) throw new NullPointerException();
+    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
+        if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -393,7 +397,8 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (!of
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {        if (e == null) throw new NullPointerException();
+    public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
+        if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -411,7 +416,8 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {        if (!of
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {        if (e == null) throw new NullPointerException();
+    public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
+        if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -476,7 +482,8 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {        E x = pollFirst();
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+        E x = pollFirst();
         if (x == null) throw new NoSuchElementException();
         return x;
     }
@@ -486,14 +493,16 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {        E x = pollLast();
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+        E x = pollLast();
         if (x == null) throw new NoSuchElementException();
         return x;
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {        final ReentrantLock lock = this.lock;
+    public @Nullable E pollFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             return unlinkFirst();
@@ -504,7 +513,8 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {        final ReentrantLock lock = this.lock;
+    public @Nullable E pollLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             return unlinkLast();
@@ -515,7 +525,8 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E takeFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {        final ReentrantLock lock = this.lock;
+    public E takeFirst(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             E x;
@@ -529,7 +540,8 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeou
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {        final ReentrantLock lock = this.lock;
+    public E takeLast(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             E x;
@@ -623,7 +635,8 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeFirstOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {        if (o == null) return false;
+    public boolean removeFirstOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
+        if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -641,7 +654,8 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeLastOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {        if (o == null) return false;
+    public boolean removeLastOccurrence(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Object o) {
+        if (o == null) return false;
         final ReentrantLock lock = this.lock;
         lock.lock();
         try {
@@ -672,7 +686,8 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable LinkedBlockingDeque<E> this, E e) {        addLast(e);
+    public boolean add(@Growable LinkedBlockingDeque<E> this, E e) {
+        addLast(e);
         return true;
     }
 
@@ -681,7 +696,8 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable LinkedBlockingDeque<E> this, E e) {        return offerLast(e);
+    public boolean offer(@Growable LinkedBlockingDeque<E> this, E e) {
+        return offerLast(e);
     }
 
     /**
@@ -690,7 +706,8 @@ public E getLast(@NonEmpty LinkedBlockingDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {        putLast(e);
+    public void put(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
+        putLast(e);
     }
 
     /**
@@ -715,22 +732,26 @@ public boolean offer(@Growable LinkedBlockingDeque<E> this, E e, long timeout, T
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {        return removeFirst();
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+        return removeFirst();
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {        return pollFirst();
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+        return pollFirst();
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {        return takeFirst();
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) throws InterruptedException {
+        return takeFirst();
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit) throws InterruptedException {        return pollFirst(timeout, unit);
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        return pollFirst(timeout, unit);
     }
 
     /**
@@ -782,7 +803,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {        return drainTo(c, Integer.MAX_VALUE);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c) {
+        return drainTo(c, Integer.MAX_VALUE);
     }
 
     /**
@@ -793,7 +815,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         if (maxElements <= 0)
@@ -820,7 +843,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable LinkedBlockingDeque<E> this, E e) {        addFirst(e);
+    public void push(@Growable LinkedBlockingDeque<E> this, E e) {
+        addFirst(e);
     }
 
     /**
@@ -828,7 +852,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {        return removeFirst();
+    public E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedBlockingDeque<E> this) {
+        return removeFirst();
     }
 
     // Collection methods
@@ -849,7 +874,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return removeFirstOccurrence(o);
+    public boolean remove(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return removeFirstOccurrence(o);
     }
 
     /**
@@ -908,7 +934,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable LinkedBlockingDeque<E> this, Collection<? extends E> c) {        if (c == this)
+    public boolean addAll(@Growable LinkedBlockingDeque<E> this, Collection<? extends E> c) {
+        if (c == this)
             // As historically specified in AbstractQueue#addAll
             throw new IllegalArgumentException();
 
@@ -1048,7 +1075,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {        final ReentrantLock lock = this.lock;
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             for (Node<E> f = first; f != null; ) {
@@ -1410,7 +1438,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1419,7 +1448,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1428,7 +1458,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index bface22fdff0..89a064279192 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -350,7 +350,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable LinkedBlockingQueue<E> this, E e) throws InterruptedException {        if (e == null) throw new NullPointerException();
+    public void put(@Growable LinkedBlockingQueue<E> this, E e) throws InterruptedException {
+        if (e == null) throw new NullPointerException();
         final int c;
         final Node<E> node = new Node<E>(e);
         final ReentrantLock putLock = this.putLock;
@@ -429,7 +430,8 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, T
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable LinkedBlockingQueue<E> this, E e) {        if (e == null) throw new NullPointerException();
+    public boolean offer(@Growable LinkedBlockingQueue<E> this, E e) {
+        if (e == null) throw new NullPointerException();
         final AtomicInteger count = this.count;
         if (count.get() == capacity)
             return false;
@@ -454,7 +456,8 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, T
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws InterruptedException {        final E x;
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) throws InterruptedException {
+        final E x;
         final int c;
         final AtomicInteger count = this.count;
         final ReentrantLock takeLock = this.takeLock;
@@ -477,7 +480,8 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, T
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        final E x;
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        final E x;
         final int c;
         long nanos = unit.toNanos(timeout);
         final AtomicInteger count = this.count;
@@ -503,7 +507,8 @@ public boolean offer(@Growable LinkedBlockingQueue<E> this, E e, long timeout, T
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {        final AtomicInteger count = this.count;
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
+        final AtomicInteger count = this.count;
         if (count.get() == 0)
             return null;
         final E x;
@@ -568,7 +573,8 @@ void unlink(Node<E> p, Node<E> pred) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o == null) return false;
+    public boolean remove(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o == null) return false;
         fullyLock();
         try {
             for (Node<E> pred = head, p = pred.next;
@@ -702,7 +708,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {        fullyLock();
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this) {
+        fullyLock();
         try {
             for (Node<E> p, h = head; (p = h.next) != null; h = p) {
                 h.next = h;
@@ -725,7 +732,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {        return drainTo(c, Integer.MAX_VALUE);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c) {
+        return drainTo(c, Integer.MAX_VALUE);
     }
 
     /**
@@ -736,7 +744,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         if (maxElements <= 0)
@@ -1067,7 +1076,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1076,7 +1086,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1085,7 +1096,8 @@ void forEachFrom(Consumer<? super E> action, Node<E> p) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index b3ab3732b04e..392bdb73c7a7 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -1219,7 +1219,8 @@ else if (s == n)    // stale
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable LinkedTransferQueue<E> this, E e) {        xfer(e, true, ASYNC, 0L);
+    public void put(@Growable LinkedTransferQueue<E> this, E e) {
+        xfer(e, true, ASYNC, 0L);
     }
 
     /**
@@ -1233,7 +1234,8 @@ else if (s == n)    // stale
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit) {        xfer(e, true, ASYNC, 0L);
+    public boolean offer(@Growable LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit) {
+        xfer(e, true, ASYNC, 0L);
         return true;
     }
 
@@ -1246,7 +1248,8 @@ else if (s == n)    // stale
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable LinkedTransferQueue<E> this, E e) {        xfer(e, true, ASYNC, 0L);
+    public boolean offer(@Growable LinkedTransferQueue<E> this, E e) {
+        xfer(e, true, ASYNC, 0L);
         return true;
     }
 
@@ -1261,7 +1264,8 @@ else if (s == n)    // stale
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable LinkedTransferQueue<E> this, E e) {        xfer(e, true, ASYNC, 0L);
+    public boolean add(@Growable LinkedTransferQueue<E> this, E e) {
+        xfer(e, true, ASYNC, 0L);
         return true;
     }
 
@@ -1277,7 +1281,8 @@ else if (s == n)    // stale
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {        return xfer(e, true, NOW, 0L) == null;
+    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {
+        return xfer(e, true, NOW, 0L) == null;
     }
 
     /**
@@ -1293,7 +1298,8 @@ else if (s == n)    // stale
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {        if (xfer(e, true, SYNC, 0L) != null) {
+    public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
+        if (xfer(e, true, SYNC, 0L) != null) {
             Thread.interrupted(); // failure possible only due to interrupt
             throw new InterruptedException();
         }
@@ -1325,7 +1331,8 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {        E e = xfer(null, false, SYNC, 0L);
+    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
+        E e = xfer(null, false, SYNC, 0L);
         if (e != null)
             return e;
         Thread.interrupted();
@@ -1334,7 +1341,8 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        E e = xfer(null, false, TIMED, unit.toNanos(timeout));
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        E e = xfer(null, false, TIMED, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;
         throw new InterruptedException();
@@ -1342,7 +1350,8 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {        return xfer(null, false, NOW, 0L);
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+        return xfer(null, false, NOW, 0L);
     }
 
     /**
@@ -1351,7 +1360,8 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         int n = 0;
@@ -1366,7 +1376,8 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         int n = 0;
@@ -1471,7 +1482,8 @@ public int getWaitingConsumerCount() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink LinkedTransferQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        if (o == null) return false;
+    public boolean remove(@Shrinkable @CanShrink LinkedTransferQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        if (o == null) return false;
         restartFromHead: for (;;) {
             for (Node p = head, pred = null; p != null; ) {
                 Node q = p.next;
@@ -1592,7 +1604,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1601,7 +1614,8 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1610,13 +1624,15 @@ private void readObject(java.io.ObjectInputStream s)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {        bulkRemove(e -> true);
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+        bulkRemove(e -> true);
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index dded68bae25b..98511f50070d 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -473,7 +473,8 @@ private void heapify() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable PriorityBlockingQueue<E> this, E e) {        return offer(e);
+    public boolean add(@Growable PriorityBlockingQueue<E> this, E e) {
+        return offer(e);
     }
 
     /**
@@ -489,7 +490,8 @@ private void heapify() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {        if (e == null)
+    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {
+        if (e == null)
             throw new NullPointerException();
         final ReentrantLock lock = this.lock;
         lock.lock();
@@ -523,7 +525,8 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {        if (
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable PriorityBlockingQueue<E> this, E e) {        offer(e); // never need to block
+    public void put(@Growable PriorityBlockingQueue<E> this, E e) {
+        offer(e); // never need to block
     }
 
     /**
@@ -543,12 +546,14 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {        if (
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e, long timeout, TimeUnit unit) {        return offer(e); // never need to block
+    public boolean offer(@Growable PriorityBlockingQueue<E> this, E e, long timeout, TimeUnit unit) {
+        return offer(e); // never need to block
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             return dequeue();
@@ -559,7 +564,8 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {        if (
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws InterruptedException {        final ReentrantLock lock = this.lock;
+    public E take(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) throws InterruptedException {
+        final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         E result;
         try {
@@ -573,7 +579,8 @@ public boolean offer(@Growable PriorityBlockingQueue<E> this, E e) {        if (
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        long nanos = unit.toNanos(timeout);
+    public @Nullable E poll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        long nanos = unit.toNanos(timeout);
         final ReentrantLock lock = this.lock;
         lock.lockInterruptibly();
         E result;
@@ -681,7 +688,8 @@ private void removeAt(int i) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, @Nullable @UnknownSignedness Object o) {        final ReentrantLock lock = this.lock;
+    public boolean remove(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, @Nullable @UnknownSignedness Object o) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             int i = indexOf(o);
@@ -748,7 +756,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {        return drainTo(c, Integer.MAX_VALUE);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c) {
+        return drainTo(c, Integer.MAX_VALUE);
     }
 
     /**
@@ -759,7 +768,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         if (maxElements <= 0)
@@ -784,7 +794,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {        final ReentrantLock lock = this.lock;
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this) {
+        final ReentrantLock lock = this.lock;
         lock.lock();
         try {
             final Object[] es = queue;
@@ -1062,7 +1073,8 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1071,7 +1083,8 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -1080,7 +1093,8 @@ public Spliterator<E> spliterator() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink PriorityBlockingQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index 5926699cda9b..c9871800c108 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -856,7 +856,8 @@ void clean(QNode pred, QNode s) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedException {        if (e == null) throw new NullPointerException();
+    public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedException {
+        if (e == null) throw new NullPointerException();
         if (transferer.transfer(e, false, 0) == null) {
             Thread.interrupted();
             throw new InterruptedException();
@@ -894,7 +895,8 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, Time
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable SynchronousQueue<E> this, E e) {        if (e == null) throw new NullPointerException();
+    public boolean offer(@Growable SynchronousQueue<E> this, E e) {
+        if (e == null) throw new NullPointerException();
         return transferer.transfer(e, true, 0) != null;
     }
 
@@ -907,7 +909,8 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, Time
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {        E e = transferer.transfer(null, false, 0);
+    public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {
+        E e = transferer.transfer(null, false, 0);
         if (e != null)
             return e;
         Thread.interrupted();
@@ -925,7 +928,8 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, Time
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {        E e = transferer.transfer(null, true, unit.toNanos(timeout));
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+        E e = transferer.transfer(null, true, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;
         throw new InterruptedException();
@@ -940,7 +944,8 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, Time
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {        return transferer.transfer(null, true, 0);
+    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+        return transferer.transfer(null, true, 0);
     }
 
     /**
@@ -982,7 +987,8 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {    }
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+    }
 
     /**
      * Always returns {@code false}.
@@ -1006,7 +1012,8 @@ public boolean contains(@GuardSatisfied @Nullable @UnknownSignedness Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink SynchronousQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        return false;
+    public boolean remove(@Shrinkable @CanShrink SynchronousQueue<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        return false;
     }
 
     /**
@@ -1030,7 +1037,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {        return false;
+    public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        return false;
     }
 
     /**
@@ -1042,7 +1050,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {        return false;
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        return false;
     }
 
     /**
@@ -1120,7 +1129,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         int n = 0;
@@ -1137,7 +1147,8 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {        Objects.requireNonNull(c);
+    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+        Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
         int n = 0;

From dcae35fb978ea4d04b935d314418dad9c384a188 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 23 May 2026 21:07:23 -0700
Subject: [PATCH 085/119] Rename modifiability qualifiers

---
 README.md                                     |   3 ++-
 checker-qual.jar                              | Bin 290947 -> 291739 bytes
 .../checker/index/qual/BottomGrowShrink.java  |   2 +-
 .../checker/index/qual/PolyGrowShrink.java    |   2 +-
 .../{BottomGrow.java => BottomGrowable.java}  |   2 +-
 ...tomReplace.java => BottomReplaceable.java} |   2 +-
 ...ottomShrink.java => BottomShrinkable.java} |   2 +-
 .../checker/modifiability/qual/Growable.java  |   2 +-
 .../{MaybeGrow.java => MaybeGrowable.java}    |   2 +-
 .../modifiability/qual/MaybeModifiable.java   |   4 +--
 ...aybeReplace.java => MaybeReplaceable.java} |   2 +-
 ...{MaybeShrink.java => MaybeShrinkable.java} |   2 +-
 .../modifiability/qual/Modifiable.java        |   2 +-
 .../qual/{PolyGrow.java => PolyGrowable.java} |   6 ++---
 .../modifiability/qual/PolyModifiable.java    |   2 +-
 ...{PolyReplace.java => PolyReplaceable.java} |   6 ++---
 .../{PolyShrink.java => PolyShrinkable.java}  |   4 +--
 .../modifiability/qual/Replaceable.java       |   2 +-
 .../modifiability/qual/Shrinkable.java        |   2 +-
 .../modifiability/qual/Ungrowable.java        |   2 +-
 .../modifiability/qual/UnmodParam.java        |  23 ++++++++++++++++++
 .../modifiability/qual/Unmodifiable.java      |   2 +-
 .../modifiability/qual/Unreplaceable.java     |   2 +-
 .../modifiability/qual/Unshrinkable.java      |   2 +-
 24 files changed, 52 insertions(+), 28 deletions(-)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{BottomGrow.java => BottomGrowable.java} (94%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{BottomReplace.java => BottomReplaceable.java} (94%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{BottomShrink.java => BottomShrinkable.java} (94%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{MaybeGrow.java => MaybeGrowable.java} (96%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{MaybeReplace.java => MaybeReplaceable.java} (96%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{MaybeShrink.java => MaybeShrinkable.java} (96%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{PolyGrow.java => PolyGrowable.java} (83%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{PolyReplace.java => PolyReplaceable.java} (88%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{PolyShrink.java => PolyShrinkable.java} (90%)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java

diff --git a/README.md b/README.md
index b0e385af83d6..0693ee126f37 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,8 @@ To update that copy, run the command below from this directory:
 rm -f checker-qual.jar && \
 cp -p $CHECKERFRAMEWORK/checker-qual/build/libs/checker-qual-*-sources.jar checker-qual.jar && \
 (cd src/java.base/share/classes && rm -rf org/checkerframework && \
-  unzip ../../../../checker-qual.jar -x 'META-INF*' -x module-info.java && \
+  touch META-INF && \
+  unzip ../../../../checker-qual.jar -x module-info.java -x 'META-INF*' && \
   rm -f org/checkerframework/checker/signedness/SignednessUtilExtra.java && \
   chmod -R u+w org/checkerframework) && \
 jar tf checker-qual.jar | grep '\.java$' | sed 's/\/[^/]*\.java/;/' | sed 's/\//./g' | sed 's/^/    exports /' | sort -u
diff --git a/checker-qual.jar b/checker-qual.jar
index 83bc90c1e12ece18cb4d55b108cd9c11b33fe8ed..1d92bd752d579b6ac33721ace7c901bb49fb78d6 100644
GIT binary patch
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diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
index 2b3596199228..2c2dc9cc7349 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
@@ -18,4 +18,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({GrowOnly.class, UncheckedCanShrink.class})
-public @interface BottomGrowShrink {}
+public @interface BottomGrowableShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
index 6bb99e1af4fc..a6786d44a216 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
@@ -19,4 +19,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @PolymorphicQualifier(UnshrinkableRef.class)
-public @interface PolyGrowShrink {}
+public @interface PolyGrowableShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrowable.java
similarity index 94%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrowable.java
index a01b989a8664..74583859f068 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomGrowable.java
@@ -18,4 +18,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({Growable.class, Ungrowable.class})
-public @interface BottomGrow {}
+public @interface BottomGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplaceable.java
similarity index 94%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplaceable.java
index a2609e3558de..13bcf09aa392 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomReplaceable.java
@@ -18,4 +18,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({Replaceable.class, Unreplaceable.class})
-public @interface BottomReplace {}
+public @interface BottomReplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrinkable.java
similarity index 94%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrinkable.java
index 3cf5d6902f6e..b27c14d30ad7 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomShrinkable.java
@@ -18,4 +18,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({Shrinkable.class, Unshrinkable.class})
-public @interface BottomShrink {}
+public @interface BottomShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
index 2c8041469c75..4167df7d64b9 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeGrow.class)
+@SubtypeOf(MaybeGrowable.class)
 public @interface Growable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
index 92789632cc75..628c95dc13c7 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface MaybeGrow {}
+public @interface MaybeGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
index 5a9a53e8f45c..a36b2a03aa74 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
@@ -7,12 +7,12 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @MaybeGrow @MaybeShrink @MaybeReplace}. Represents an unknown or
+ * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. Represents an unknown or
  * arbitrary modifiability capability; the checker cannot determine whether the collection is
  * growable, shrinkable, or replaceable.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @MaybeGrow @MaybeShrink @MaybeReplace} on each annotated type.
+ * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
index 70fbbb939007..641d51b83b56 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
@@ -22,4 +22,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface MaybeReplace {}
+public @interface MaybeReplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
similarity index 96%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
index d5edc2ccf523..b6889579408b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
@@ -22,4 +22,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface MaybeShrink {}
+public @interface MaybeShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index 2d5f571deb64..f02de1c0592c 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -13,7 +13,7 @@
  *
  * <p>As an exception, {@code @Modifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Modifiable Iterator} means
- * {@code @MaybeGrow @Shrinkable @MaybeReplace Iterator}.
+ * {@code @MaybeGrowable @Shrinkable @MaybeReplaceable Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrowable.java
similarity index 83%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrowable.java
index ef00276e8d64..fe6467671535 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrow.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyGrowable.java
@@ -11,7 +11,7 @@
  * A polymorphic qualifier for the Grow hierarchy.
  *
  * <p>When used on a method, the Grow capability of the return type matches the Grow capability of
- * the argument or receiver annotated with {@code @PolyGrow}.
+ * the argument or receiver annotated with {@code @PolyGrowable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(MaybeGrow.class)
-public @interface PolyGrow {}
+@PolymorphicQualifier(MaybeGrowable.class)
+public @interface PolyGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 87345ae94317..3e8ff27cdef4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -4,7 +4,7 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @PolyGrow @PolyReplace @PolyShrink}. A polymorphic qualifier for
+ * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkable}. A polymorphic qualifier for
  * all three modifiability hierarchies.
  *
  * <p>You should write {@code @PolyModifiable} on methods that preserve or transfer modifiability,
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplaceable.java
similarity index 88%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplaceable.java
index f8664f330bca..b9f7b0fa5815 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplace.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyReplaceable.java
@@ -11,7 +11,7 @@
  * A polymorphic qualifier for the Replace hierarchy.
  *
  * <p>When used on a method, the Replace capability of the return type matches the Replace
- * capability of the argument or receiver annotated with {@code @PolyReplace}.
+ * capability of the argument or receiver annotated with {@code @PolyReplaceable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(MaybeReplace.class)
-public @interface PolyReplace {}
+@PolymorphicQualifier(MaybeReplaceable.class)
+public @interface PolyReplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
similarity index 90%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
index f35eece7403b..9ed1fef83e6b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@PolymorphicQualifier(MaybeShrink.class)
-public @interface PolyShrink {}
+@PolymorphicQualifier(MaybeShrinkable.class)
+public @interface PolyShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
index 2d7c2e7c6926..9759df8a08b4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeReplace.class)
+@SubtypeOf(MaybeReplaceable.class)
 public @interface Replaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
index 1d7fddbeea03..10af526c558c 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeShrink.class)
+@SubtypeOf(MaybeShrinkable.class)
 public @interface Shrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
index d160c345b0e4..fba98d025e2f 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Ungrowable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeGrow.class)
+@SubtypeOf(MaybeGrowable.class)
 public @interface Ungrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java
new file mode 100644
index 000000000000..7342219e5daf
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. This is a syntactic
+ * sugar for {@link MaybeModifiable}. It is intended to be used on parameters of methods that are
+ * not designed to change the parameter. This annotation is only allowed to be written within method
+ * or constructor parameter types, or explicit receiver parameter types.
+ *
+ * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
+ * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+public @interface UnmodParam {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index 53ea1e4066ff..2e233b798c11 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -13,7 +13,7 @@
  *
  * <p>As an exception, {@code @Unmodifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Unmodifiable Iterator} means
- * {@code @MaybeGrow @Unshrinkable @MaybeReplace Iterator}.
+ * {@code @MaybeGrowable @Unshrinkable @MaybeReplaceable Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
index 32dc1f2e6a47..eec0205d2c50 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unreplaceable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeReplace.class)
+@SubtypeOf(MaybeReplaceable.class)
 public @interface Unreplaceable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
index 347db2a2b656..c52ce9679d8a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
@@ -18,5 +18,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeShrink.class)
+@SubtypeOf(MaybeShrinkable.class)
 public @interface Unshrinkable {}

From 7ff341710f4f250963ba0329f0cf463ce6ec559d Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sat, 23 May 2026 21:17:47 -0700
Subject: [PATCH 086/119] Formatting fixes

---
 .../classes/java/util/AbstractCollection.java | 19 ++++---
 .../share/classes/java/util/AbstractList.java | 21 +++++---
 .../share/classes/java/util/AbstractMap.java  | 20 ++++---
 .../classes/java/util/AbstractQueue.java      | 12 +++--
 .../share/classes/java/util/AbstractSet.java  |  3 +-
 .../share/classes/java/util/Collection.java   |  3 +-
 .../share/classes/java/util/Collections.java  | 26 ++++-----
 .../share/classes/java/util/EnumMap.java      |  8 +--
 .../share/classes/java/util/HashMap.java      |  8 +--
 .../share/classes/java/util/Hashtable.java    | 32 ++++++-----
 .../classes/java/util/IdentityHashMap.java    | 20 ++++---
 .../share/classes/java/util/Iterator.java     |  3 +-
 .../classes/java/util/LinkedHashMap.java      | 20 +++----
 .../share/classes/java/util/Map.java          | 20 ++++---
 .../share/classes/java/util/NavigableMap.java |  6 +--
 .../share/classes/java/util/Properties.java   |  8 +--
 .../java/util/ReverseOrderSortedMapView.java  | 10 ++--
 .../java/util/SequencedCollection.java        | 12 +++--
 .../share/classes/java/util/SequencedMap.java | 23 +++++---
 .../share/classes/java/util/SortedMap.java    |  8 +--
 .../share/classes/java/util/Stack.java        |  6 ++-
 .../share/classes/java/util/TreeMap.java      | 22 ++++----
 .../share/classes/java/util/WeakHashMap.java  | 20 ++++---
 .../util/concurrent/ConcurrentHashMap.java    |  8 +--
 .../concurrent/ConcurrentNavigableMap.java    |  8 +--
 .../concurrent/ConcurrentSkipListMap.java     | 20 +++----
 .../util/concurrent/CopyOnWriteArrayList.java | 54 ++++++++++++-------
 .../modifiability/qual/PolyModifiable.java    |  2 +-
 .../modifiability/qual/PolyShrinkable.java    |  2 +-
 29 files changed, 250 insertions(+), 174 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 0d56b52d7d67..5d38e71d5ab5 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -105,6 +105,7 @@ protected AbstractCollection() {
      */
     @SideEffectFree
     public abstract @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
+
     @Pure
     public abstract @NonNegative int size(@GuardSatisfied AbstractCollection<E> this);
 
@@ -283,7 +284,8 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -305,7 +307,8 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {        Iterator<E> it = iterator();
+    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
                 if (it.next()==null) {
@@ -369,7 +372,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {        boolean modified = false;
+    public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
+        boolean modified = false;
         for (E e : c)
             if (add(e))
                 modified = true;
@@ -400,7 +404,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
         while (it.hasNext()) {
@@ -436,7 +441,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
         while (it.hasNext()) {
@@ -466,7 +472,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {        Iterator<E> it = iterator();
+    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+        Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
             it.remove();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index 058756423853..ee3a2f87e659 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -142,7 +142,8 @@ protected AbstractList() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {        add(size(), e);
+    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
+        add(size(), e);
         return true;
     }
 
@@ -169,7 +170,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {        throw new UnsupportedOperationException();
+    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -187,7 +189,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {        throw new UnsupportedOperationException();
+    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -202,7 +205,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {        throw new UnsupportedOperationException();
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
+        throw new UnsupportedOperationException();
     }
 
 
@@ -283,7 +287,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {        removeRange(0, size());
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
+        removeRange(0, size());
     }
 
     /**
@@ -308,7 +313,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {        rangeCheckForAdd(index);
+    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
+        rangeCheckForAdd(index);
         boolean modified = false;
         for (E e : c) {
             add(index++, e);
@@ -654,7 +660,8 @@ public int hashCode(@GuardSatisfied AbstractList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {        ListIterator<E> it = listIterator(fromIndex);
+    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+        ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
             it.remove();
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 2427bba6be06..2e3a34a369b2 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -250,7 +250,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {        throw new UnsupportedOperationException();
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -277,7 +278,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {        Iterator<Entry<K,V>> i = entrySet().iterator();
+    public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        Iterator<Entry<K,V>> i = entrySet().iterator();
         Entry<K,V> correctEntry = null;
         if (key==null) {
             while (correctEntry==null && i.hasNext()) {
@@ -323,7 +325,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {        for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
+    public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
+        for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
     }
 
@@ -341,7 +344,8 @@ public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {        entrySet().clear();
+    public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
+        entrySet().clear();
     }
 
 
@@ -391,7 +395,7 @@ public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this
      * method will not all return the same set.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -465,7 +469,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -523,7 +527,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    public abstract @IteratorPolyMod @PolyShrink @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
+    public abstract @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index 67de85968221..518de35e56bd 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -107,7 +107,8 @@ public abstract class AbstractQueue<E>
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {        if (offer(e))
+    public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
+        if (offer(e))
             return true;
         else
             throw new IllegalStateException("Queue full");
@@ -126,7 +127,8 @@ public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {        E x = poll();
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {
+        E x = poll();
         if (x != null)
             return x;
         else
@@ -162,7 +164,8 @@ public E element(@GuardSatisfied @NonEmpty AbstractQueue<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {        while (poll() != null)
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {
+        while (poll() != null)
             ;
     }
 
@@ -197,7 +200,8 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {        if (c == null)
+    public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {
+        if (c == null)
             throw new NullPointerException();
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index d6a689363555..bc52ec9e9f9e 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -179,7 +179,8 @@ public int hashCode(@GuardSatisfied AbstractSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
 
         if (size() > c.size()) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index cf08a7d6292a..aee783f15f80 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -624,7 +624,8 @@ default <T> T[] toArray(Collection<E> this, IntFunction<T[]> generator) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
         while (each.hasNext()) {
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 69e447153637..3e21cc2578b1 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -33,7 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
@@ -3218,7 +3218,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (keySet==null)
                     keySet = new SynchronizedSet<>(m.keySet(), mutex);
@@ -3227,7 +3227,7 @@ public void clear() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (entrySet==null)
                     entrySet = new SynchronizedSet<>(m.entrySet(), mutex);
@@ -3235,7 +3235,7 @@ public void clear() {
             }
         }
 
-        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (values==null)
                     values = new SynchronizedCollection<>(m.values(), mutex);
@@ -3544,19 +3544,19 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
             }
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
             }
@@ -4385,8 +4385,8 @@ private String badValueMsg(Object value) {
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
         public void clear()                    { m.clear(); }
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink CheckedMap<K,V> this)                 { return m.keySet(); }
-        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink CheckedMap<K,V> this)          { return m.values(); }
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable CheckedMap<K,V> this)                 { return m.keySet(); }
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable CheckedMap<K,V> this)          { return m.values(); }
         @Pure
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         @Pure
@@ -4427,7 +4427,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
             return entrySet;
@@ -4957,17 +4957,17 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
 
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index a257ac644259..93bcc3f6da52 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -426,7 +426,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      * @return a set view of the keys contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -474,7 +474,7 @@ public void clear(@Shrinkable KeySet this) {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -528,7 +528,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 3c8f01e98d41..6226d56444b9 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -962,7 +962,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1102,7 +1102,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1169,7 +1169,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 74b64b742139..04007f5d5075 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -514,7 +514,8 @@ private void addEntry(int hash, K key, V value, int index) {
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @Nullable V put(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, K key, V value) {        // Make sure the value is not null
+    public synchronized @Nullable V put(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, K key, V value) {
+        // Make sure the value is not null
         if (value == null) {
             throw new NullPointerException();
         }
@@ -548,7 +549,8 @@ private void addEntry(int hash, K key, V value, int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {        Entry<?,?> tab[] = table;
+    public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        Entry<?,?> tab[] = table;
         int hash = key.hashCode();
         int index = (hash & 0x7FFFFFFF) % tab.length;
         @SuppressWarnings("unchecked")
@@ -581,7 +583,8 @@ private void addEntry(int hash, K key, V value, int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {        for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
+    public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {
+        for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
             put(e.getKey(), e.getValue());
     }
 
@@ -590,7 +593,8 @@ public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {        Entry<?,?> tab[] = table;
+    public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {
+        Entry<?,?> tab[] = table;
         for (int index = tab.length; --index >= 0; )
             tab[index] = null;
         modCount++;
@@ -707,7 +711,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -756,7 +760,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -847,7 +851,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
@@ -1006,7 +1010,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {        Objects.requireNonNull(value);
+    public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {
+        Objects.requireNonNull(value);
 
         // Makes sure the key is not already in the hashtable.
         Entry<?,?> tab[] = table;
@@ -1031,7 +1036,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        Objects.requireNonNull(value);
+    public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        Objects.requireNonNull(value);
 
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -1057,7 +1063,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {        Objects.requireNonNull(oldValue);
+    public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {
+        Objects.requireNonNull(oldValue);
         Objects.requireNonNull(newValue);
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -1080,7 +1087,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {        Objects.requireNonNull(value);
+    public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {
+        Objects.requireNonNull(value);
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
         int index = (hash & 0x7FFFFFFF) % tab.length;
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 193d30e3e48e..049baa1d37ad 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -469,7 +469,8 @@ private boolean containsMapping(@UnknownSignedness @GuardSatisfied @Nullable Obj
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {        final Object k = maskNull(key);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {
+        final Object k = maskNull(key);
 
         retryAfterResize: for (;;) {
             final Object[] tab = table;
@@ -551,7 +552,8 @@ private boolean resize(int newCapacity) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {        int n = m.size();
+    public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+        int n = m.size();
         if (n == 0)
             return;
         if (n > size)
@@ -574,7 +576,8 @@ private boolean resize(int newCapacity) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        Object k = maskNull(key);
+    public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        Object k = maskNull(key);
         Object[] tab = table;
         int len = tab.length;
         int i = hash(k, len);
@@ -671,7 +674,8 @@ private void closeDeletion(int d) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {        modCount++;
+    public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+        modCount++;
         Object[] tab = table;
         for (int i = 0; i < tab.length; i++)
             tab[i] = null;
@@ -1046,7 +1050,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1166,7 +1170,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1284,7 +1288,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index 798b8538efee..c1dd90bf6868 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -122,7 +122,8 @@ public interface Iterator<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {        throw new UnsupportedOperationException("remove");
+    default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {
+        throw new UnsupportedOperationException("remove");
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index a408dd0b707c..d994b2180f4a 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -662,7 +662,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -675,7 +675,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrinkable @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrinkable LinkedHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             SequencedSet<K> sks = new LinkedKeySet(false);
@@ -829,7 +829,7 @@ public SequencedSet<K> reversed() {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -842,7 +842,7 @@ public SequencedSet<K> reversed() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink LinkedHashMap<K, V> this) {
+    public @PolyShrinkable @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrinkable LinkedHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             SequencedCollection<V> svs = new LinkedValues(false);
@@ -950,7 +950,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -963,7 +963,7 @@ public SequencedCollection<V> reversed() {
      * @return {@inheritDoc}
      * @since 21
      */
-    public @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable LinkedHashMap<K, V> this) {
+    public @PolyShrinkable @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable LinkedHashMap<K, V> this) {
         Set<Map.Entry<K, V>> es = entrySet;
         if (es == null) {
             SequencedSet<Map.Entry<K, V>> ses = new LinkedEntrySet(false);
@@ -1269,17 +1269,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedKeySet().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedValues().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedEntrySet().reversed();
         }
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 90114282fb60..591c8478294b 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -403,7 +403,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -421,7 +421,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrink @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -440,7 +440,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
@@ -908,7 +908,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {        V v = get(key);
+    default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {
+        V v = get(key);
         if (v == null) {
             v = put(key, value);
         }
@@ -953,7 +954,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
     @CFComment("nullness: key and value are not @Nullable because this map might not permit null values")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        Object curValue = get(key);
+    default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        Object curValue = get(key);
         if (!Objects.equals(curValue, value) ||
             (curValue == null && !containsKey(key))) {
             return false;
@@ -1004,7 +1006,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {        Object curValue = get(key);
+    default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {
+        Object curValue = get(key);
         if (!Objects.equals(curValue, oldValue) ||
             (curValue == null && !containsKey(key))) {
             return false;
@@ -1053,7 +1056,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {        V curValue;
+    default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {
+        V curValue;
         if (((curValue = get(key)) != null) || containsKey(key)) {
             curValue = put(key, value);
         }
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 35c90af29958..51d379b92838 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -330,7 +330,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index a8f088627ccb..0d4b048197c7 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -1412,19 +1412,19 @@ public synchronized String toString() {
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrink Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrinkable Properties this) {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<Object> values(@PolyShrink Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<Object> values(@PolyShrinkable Properties this) {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
 
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index bda33771dfa0..c7cf58a7393f 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -115,7 +115,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -130,7 +130,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -145,7 +145,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -438,7 +438,7 @@ public String toString() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
             return new AbstractSet<>() {
                 @SideEffectFree
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index c1f051acea37..8df7e5539589 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -113,7 +113,8 @@ public interface SequencedCollection<E> extends Collection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addFirst(@Growable SequencedCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    default void addFirst(@Growable SequencedCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -132,7 +133,8 @@ public interface SequencedCollection<E> extends Collection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addLast(@Growable SequencedCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    default void addLast(@Growable SequencedCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -186,7 +188,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {        var it = this.iterator();
+    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+        var it = this.iterator();
         E e = it.next();
         it.remove();
         return e;
@@ -209,7 +212,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {        var it = this.reversed().iterator();
+    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+        var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
         return e;
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index a7f861d733f7..a584cc370b09 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -27,7 +27,7 @@
 
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -200,7 +200,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {        var it = entrySet().iterator();
+    default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {
+        var it = entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
             it.remove();
@@ -226,7 +227,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {        var it = reversed().entrySet().iterator();
+    default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
+        var it = reversed().entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
             it.remove();
@@ -253,7 +255,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {        throw new UnsupportedOperationException();
+    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -273,7 +276,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {        throw new UnsupportedOperationException();
+    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -292,7 +296,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {        class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
+    default @PolyShrinkable @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrinkable SequencedMap<K,V> this) {
+        class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
             Collection<K> view() {
                 return SequencedMap.this.keySet();
             }
@@ -328,7 +333,8 @@ public int hashCode() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {        class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
+    default @PolyShrinkable @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrinkable SequencedMap<K,V> this) {
+        class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
             Collection<V> view() {
                 return SequencedMap.this.values();
             }
@@ -355,7 +361,8 @@ public SequencedCollection<V> reversed() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {        class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
+    default @PolyShrinkable @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
+        class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
                 implements SequencedSet<Map.Entry<K, V>> {
             Collection<Map.Entry<K, V>> view() {
                 return SequencedMap.this.entrySet();
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 8c01a694261f..5a7c0460749d 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -286,7 +286,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -307,7 +307,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 301b50ae5a0d..ab8c4b91a1da 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -82,7 +82,8 @@ public class Stack<E> extends Vector<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E push(@Growable @GuardSatisfied Stack<E> this, E item) {        addElement(item);
+    public E push(@Growable @GuardSatisfied Stack<E> this, E item) {
+        addElement(item);
 
         return item;
     }
@@ -97,7 +98,8 @@ public class Stack<E> extends Vector<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {        E       obj;
+    public synchronized E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {
+        E       obj;
         int     len = size();
 
         obj = peek();
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 0a63820cadd0..299209736763 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
@@ -1200,7 +1200,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1208,7 +1208,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1217,7 +1217,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1243,7 +1243,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1275,7 +1275,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
@@ -2110,19 +2110,19 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        public final @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink NavigableSubMap<K,V> this) {
+        public final @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
         @SideEffectFree
-        public final @IteratorPolyMod @PolyShrink @Ungrowable Set<K> keySet(@PolyShrink NavigableSubMap<K,V> this) {
+        public final @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink NavigableSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return descendingMap().navigableKeySet();
         }
 
@@ -2467,7 +2467,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
         }
@@ -2561,7 +2561,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
         }
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 8ad6b1cf77aa..61ce125e513e 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -494,7 +494,8 @@ Entry<K,V> getEntry(Object key) {
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {        Object k = maskNull(key);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {
+        Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
         int i = indexFor(h, tab.length);
@@ -587,7 +588,8 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {        int numKeysToBeAdded = m.size();
+    public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+        int numKeysToBeAdded = m.size();
         if (numKeysToBeAdded == 0)
             return;
 
@@ -637,7 +639,8 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        Object k = maskNull(key);
+    public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
         int i = indexFor(h, tab.length);
@@ -697,7 +700,8 @@ boolean removeMapping(Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {        // clear out ref queue. We don't need to expunge entries
+    public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+        // clear out ref queue. We don't need to expunge entries
         // since table is getting cleared.
         while (queue.poll() != null)
             ;
@@ -932,7 +936,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -995,7 +999,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1048,7 +1052,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 2d7d2a4eb368..549a557f883b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -40,7 +40,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -1287,7 +1287,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySetView<K,V>(this, null);
@@ -1312,7 +1312,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1336,7 +1336,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrink ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index b6fe3704d308..88089e87c66f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -187,5 +187,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 2932967cdcb6..a8674395be54 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -40,7 +40,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
-import org.checkerframework.checker.modifiability.qual.PolyShrink;
+import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
@@ -1656,14 +1656,14 @@ else if (doRemove(key, v) != null)
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1689,7 +1689,7 @@ else if (doRemove(key, v) != null)
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1723,7 +1723,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1738,7 +1738,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrink ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -3068,28 +3068,28 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
         /* ---------------- Submap Views -------------- */
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> keySet(@PolyShrink SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrink SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Collection<V> values(@PolyShrink SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SubMap<K,V> this) {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
             return valuesView = new Values<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrink @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrink SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable SubMap<K,V> this) {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
             return entrySetView = new EntrySet<K,V>(this);
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index 79b0c90ebf95..0679f8f9ad49 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -485,7 +485,8 @@ public E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {        synchronized (lock) {
+    public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
+        synchronized (lock) {
             Object[] es = getArray();
             E oldValue = elementAt(es, index);
 
@@ -508,7 +509,8 @@ public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {        synchronized (lock) {
+    public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             es = Arrays.copyOf(es, len + 1);
@@ -527,7 +529,8 @@ public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {        synchro
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {        synchronized (lock) {
+    public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             if (index > len || index < 0)
@@ -554,7 +557,8 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {        add(0, e);
+    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
+        add(0, e);
     }
 
     /**
@@ -564,7 +568,8 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {        synchronized (lock) {
+    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
+        synchronized (lock) {
             add(getArray().length, e);
         }
     }
@@ -578,7 +583,8 @@ public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {        synchr
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {        synchronized (lock) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             E oldValue = elementAt(es, index);
@@ -605,7 +611,8 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             if (getArray().length == 0)
                 throw new NoSuchElementException();
             else
@@ -621,7 +628,8 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrit
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             int size = getArray().length;
             if (size == 0)
                 throw new NoSuchElementException();
@@ -644,7 +652,8 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrite
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        Object[] snapshot = getArray();
+    public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        Object[] snapshot = getArray();
         int index = indexOfRange(o, snapshot, 0, snapshot.length);
         return index >= 0 && remove(o, snapshot, index);
     }
@@ -725,7 +734,8 @@ void removeRange(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int fr
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {        Object[] snapshot = getArray();
+    public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {
+        Object[] snapshot = getArray();
         return indexOfRange(e, snapshot, 0, snapshot.length) < 0
             && addIfAbsent(e, snapshot);
     }
@@ -794,7 +804,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -816,7 +827,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
@@ -833,7 +845,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {        Object[] cs = c.toArray();
+    public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
+        Object[] cs = c.toArray();
         if (c.getClass() != ArrayList.class) {
             cs = cs.clone();
         }
@@ -865,7 +878,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             setArray(new Object[0]);
         }
     }
@@ -882,7 +896,8 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {        Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
+        Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
             ((CopyOnWriteArrayList<?>)c).getArray() : c.toArray();
         if (cs.length == 0)
             return false;
@@ -920,7 +935,8 @@ public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? exten
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {        Object[] cs = c.toArray();
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {
+        Object[] cs = c.toArray();
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -961,7 +977,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1035,7 +1052,8 @@ void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {        synchronized (lock) {
+    public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {
+        synchronized (lock) {
             sortRange(c, 0, getArray().length);
         }
     }
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 3e8ff27cdef4..93c85ea6db3d 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -4,7 +4,7 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkable}. A polymorphic qualifier for
+ * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkableable}. A polymorphic qualifier for
  * all three modifiability hierarchies.
  *
  * <p>You should write {@code @PolyModifiable} on methods that preserve or transfer modifiability,
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
index 9ed1fef83e6b..252d128e9ed7 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
@@ -19,4 +19,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @PolymorphicQualifier(MaybeShrinkable.class)
-public @interface PolyShrinkable {}
+public @interface PolyShrinkableable {}

From b62a2abd98c61a922944ca1dd9a94f84aabf2509 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 24 May 2026 20:09:43 -0700
Subject: [PATCH 087/119] Use `ci-org-and-branch` instead of `ci-info`

---
 .azure/azure-pipelines.yml    | 4 ++--
 .azure/azure-pipelines.yml.m4 | 4 ++--
 .github/workflows/ci.yml      | 6 +++---
 .github/workflows/ci.yml.m4   | 6 +++---
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
index d0a6278a2556..6c1a142eb0ed 100644
--- a/.azure/azure-pipelines.yml
+++ b/.azure/azure-pipelines.yml
@@ -79,7 +79,7 @@ jobs:
       - bash: |
           git config --global --add safe.directory $(cd ../jdk21u && pwd)
           cd ../jdk21u && git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           set
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
         displayName: git merge plan
@@ -92,7 +92,7 @@ jobs:
           git config --global core.longpaths true
           git config --global core.protectNTFS false
           cd ../jdk21u && git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           set
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
           cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
diff --git a/.azure/azure-pipelines.yml.m4 b/.azure/azure-pipelines.yml.m4
index 5e1d4c8e38af..fb878ceafc54 100644
--- a/.azure/azure-pipelines.yml.m4
+++ b/.azure/azure-pipelines.yml.m4
@@ -82,7 +82,7 @@ jobs:
       - bash: |
           git config --global --add safe.directory $(cd ../jdk21u && pwd)
           cd ../jdk21u && git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           set
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
         displayName: git merge plan
@@ -95,7 +95,7 @@ jobs:
           git config --global core.longpaths true
           git config --global core.protectNTFS false
           cd ../jdk21u && git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           set
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
           cd ../jdk21u && git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME} || (git --version && git show | head -100 && git status && git diff | head -1000 && echo "Merge failed; see 'Pull request merge conflicts' at https://github.com/typetools/jdk/blob/master/README.md " && false)
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57d44cb35f57..e35be06b0643 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -96,8 +96,8 @@ jobs:
         # Run `git-clone-related` without a limit on depth, because if the depth is
         # too small, the merge will fail.  Don't use "--filter=blob:none" because that
         # leads to "fatal: remote error:  filter 'combine' not supported".
-      - name: ci-info
-        run: /tmp/$USER/plume-scripts/ci-info --debug
+      - name: ci-org-and-branch
+        run: /tmp/$USER/plume-scripts/ci-org-and-branch --debug
       - name: clone-related-jdk21u
         run: |
           set -ex
@@ -116,7 +116,7 @@ jobs:
           set -ex
           cd ../jdk21u
           git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
           if ! git pull --no-edit "https://github.com/${CI_ORGANIZATION}/jdk" "${CI_BRANCH_NAME}"; then
             git --version
diff --git a/.github/workflows/ci.yml.m4 b/.github/workflows/ci.yml.m4
index 50210af2491f..1f2bd7ff238e 100644
--- a/.github/workflows/ci.yml.m4
+++ b/.github/workflows/ci.yml.m4
@@ -100,8 +100,8 @@ jobs:
         # Run `git-clone-related` without a limit on depth, because if the depth is
         # too small, the merge will fail.  Don't use "--filter=blob:none" because that
         # leads to "fatal: remote error:  filter 'combine' not supported".
-      - name: ci-info
-        run: /tmp/$USER/plume-scripts/ci-info --debug
+      - name: ci-org-and-branch
+        run: /tmp/$USER/plume-scripts/ci-org-and-branch --debug
       - name: clone-related-jdk21u
         run: |
           set -ex
@@ -120,7 +120,7 @@ jobs:
           set -ex
           cd ../jdk21u
           git status
-          eval $(/tmp/$USER/plume-scripts/ci-info typetools)
+          eval $(/tmp/$USER/plume-scripts/ci-org-and-branch typetools)
           echo "About to run: git pull --no-edit https://github.com/${CI_ORGANIZATION}/jdk ${CI_BRANCH_NAME}"
           if ! git pull --no-edit "https://github.com/${CI_ORGANIZATION}/jdk" "${CI_BRANCH_NAME}"; then
             git --version

From 147db198ec6a5016d50c4659d9cbd40b6888e84d Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Mon, 25 May 2026 12:15:26 -0700
Subject: [PATCH 088/119] Remove nearly-empty file

---
 README-merging.el | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 README-merging.el

diff --git a/README-merging.el b/README-merging.el
deleted file mode 100644
index 5b657bd00aaf..000000000000
--- a/README-merging.el
+++ /dev/null
@@ -1 +0,0 @@
-;; See file diff-resolve.el

From 723083f872e4c11359fdd18510b2f217be7e830b Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Tue, 26 May 2026 08:53:06 -0700
Subject: [PATCH 089/119] Update qualifiers

---
 checker-qual.jar                              | Bin 291739 -> 291748 bytes
 src/java.base/share/classes/module-info.java  |   2 +-
 .../checker/index/qual/BottomGrowShrink.java  |   2 +-
 .../checker/index/qual/PolyGrowShrink.java    |   2 +-
 .../modifiability/qual/MaybeModifiable.java   |   6 +++---
 .../modifiability/qual/PolyModifiable.java    |   4 ++--
 .../modifiability/qual/PolyShrinkable.java    |   2 +-
 ...UnmodParam.java => UnmodifiableParam.java} |  10 +++++-----
 8 files changed, 14 insertions(+), 14 deletions(-)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{UnmodParam.java => UnmodifiableParam.java} (66%)

diff --git a/checker-qual.jar b/checker-qual.jar
index 1d92bd752d579b6ac33721ace7c901bb49fb78d6..92ec2c9758ac4af63571c4096a6db5ad6ebef102 100644
GIT binary patch
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diff --git a/src/java.base/share/classes/module-info.java b/src/java.base/share/classes/module-info.java
index 17659d96aa63..275a19414e0b 100644
--- a/src/java.base/share/classes/module-info.java
+++ b/src/java.base/share/classes/module-info.java
@@ -82,8 +82,8 @@
     exports org.checkerframework.checker.fenum.qual;
     exports org.checkerframework.checker.formatter.qual;
     exports org.checkerframework.checker.guieffect.qual;
-    exports org.checkerframework.checker.i18n.qual;
     exports org.checkerframework.checker.i18nformatter.qual;
+    exports org.checkerframework.checker.i18n.qual;
     exports org.checkerframework.checker.index.qual;
     exports org.checkerframework.checker.initialization.qual;
     exports org.checkerframework.checker.interning.qual;
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
index 2c2dc9cc7349..2b3596199228 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/BottomGrowShrink.java
@@ -18,4 +18,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({GrowOnly.class, UncheckedCanShrink.class})
-public @interface BottomGrowableShrink {}
+public @interface BottomGrowShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java b/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
index a6786d44a216..6bb99e1af4fc 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/index/qual/PolyGrowShrink.java
@@ -19,4 +19,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @PolymorphicQualifier(UnshrinkableRef.class)
-public @interface PolyGrowableShrink {}
+public @interface PolyGrowShrink {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
index a36b2a03aa74..c4b7e274efda 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
@@ -7,9 +7,9 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. Represents an unknown or
- * arbitrary modifiability capability; the checker cannot determine whether the collection is
- * growable, shrinkable, or replaceable.
+ * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. Represents
+ * an unknown or arbitrary modifiability capability; the checker cannot determine whether the
+ * collection is growable, shrinkable, or replaceable.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
  * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 93c85ea6db3d..517762db7857 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -4,8 +4,8 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkableable}. A polymorphic qualifier for
- * all three modifiability hierarchies.
+ * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkable}. A polymorphic
+ * qualifier for all three modifiability hierarchies.
  *
  * <p>You should write {@code @PolyModifiable} on methods that preserve or transfer modifiability,
  * such as {@code List.subList()}, {@code iterator()}, and {@code stream()}.
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
index 252d128e9ed7..9ed1fef83e6b 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyShrinkable.java
@@ -19,4 +19,4 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @PolymorphicQualifier(MaybeShrinkable.class)
-public @interface PolyShrinkableable {}
+public @interface PolyShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
similarity index 66%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
index 7342219e5daf..3f3662d5a767 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodParam.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
@@ -7,10 +7,10 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. This is a syntactic
- * sugar for {@link MaybeModifiable}. It is intended to be used on parameters of methods that are
- * not designed to change the parameter. This annotation is only allowed to be written within method
- * or constructor parameter types, or explicit receiver parameter types.
+ * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. This is a
+ * syntactic sugar for {@link MaybeModifiable}. It is intended to be used on parameters of methods
+ * that are not designed to change the parameter. This annotation is only allowed to be written
+ * within method or constructor parameter types, or explicit receiver parameter types.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
  * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
@@ -20,4 +20,4 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-public @interface UnmodParam {}
+public @interface UnmodifiableParam {}

From 2e20f49d7054f91c92201952709c3d04c5a8b3ae Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Tue, 26 May 2026 09:18:10 -0700
Subject: [PATCH 090/119] Fix broken merge

---
 .../classes/java/util/AbstractCollection.java | 18 ++++---
 .../share/classes/java/util/AbstractList.java | 21 +++++---
 .../share/classes/java/util/AbstractMap.java  | 12 +++--
 .../classes/java/util/AbstractQueue.java      | 12 +++--
 .../share/classes/java/util/AbstractSet.java  |  3 +-
 .../share/classes/java/util/Collection.java   |  3 +-
 .../share/classes/java/util/Hashtable.java    | 21 +++++---
 .../classes/java/util/IdentityHashMap.java    | 12 +++--
 .../share/classes/java/util/Iterator.java     |  3 +-
 .../share/classes/java/util/Map.java          | 12 +++--
 .../java/util/SequencedCollection.java        | 12 +++--
 .../share/classes/java/util/SequencedMap.java | 21 +++++---
 .../share/classes/java/util/Stack.java        |  6 ++-
 .../share/classes/java/util/WeakHashMap.java  | 12 +++--
 .../util/concurrent/CopyOnWriteArrayList.java | 54 ++++++++++++-------
 15 files changed, 148 insertions(+), 74 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 0d56b52d7d67..caea9e1bc2fa 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -283,7 +283,8 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -305,7 +306,8 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {        Iterator<E> it = iterator();
+    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+        Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
                 if (it.next()==null) {
@@ -369,7 +371,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {        boolean modified = false;
+    public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Collection<? extends E> c) {
+        boolean modified = false;
         for (E e : c)
             if (add(e))
                 modified = true;
@@ -400,7 +403,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
         while (it.hasNext()) {
@@ -436,7 +440,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
         while (it.hasNext()) {
@@ -466,7 +471,8 @@ public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSat
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {        Iterator<E> it = iterator();
+    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+        Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
             it.remove();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index 058756423853..ee3a2f87e659 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -142,7 +142,8 @@ protected AbstractList() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {        add(size(), e);
+    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
+        add(size(), e);
         return true;
     }
 
@@ -169,7 +170,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {        throw new UnsupportedOperationException();
+    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -187,7 +189,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {        throw new UnsupportedOperationException();
+    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -202,7 +205,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {        throw new UnsupportedOperationException();
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
+        throw new UnsupportedOperationException();
     }
 
 
@@ -283,7 +287,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {        removeRange(0, size());
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
+        removeRange(0, size());
     }
 
     /**
@@ -308,7 +313,8 @@ protected AbstractList() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {        rangeCheckForAdd(index);
+    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
+        rangeCheckForAdd(index);
         boolean modified = false;
         for (E e : c) {
             add(index++, e);
@@ -654,7 +660,8 @@ public int hashCode(@GuardSatisfied AbstractList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {        ListIterator<E> it = listIterator(fromIndex);
+    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+        ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
             it.remove();
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 2427bba6be06..d8e24ae0a32c 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -250,7 +250,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {        throw new UnsupportedOperationException();
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, K key, V value) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -277,7 +278,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {        Iterator<Entry<K,V>> i = entrySet().iterator();
+    public @Nullable V remove(@Shrinkable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        Iterator<Entry<K,V>> i = entrySet().iterator();
         Entry<K,V> correctEntry = null;
         if (key==null) {
             while (correctEntry==null && i.hasNext()) {
@@ -323,7 +325,8 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {        for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
+    public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this, Map<? extends K, ? extends V> m) {
+        for (Map.Entry<? extends K, ? extends V> e : m.entrySet())
             put(e.getKey(), e.getValue());
     }
 
@@ -341,7 +344,8 @@ public void putAll(@Growable @Replaceable @GuardSatisfied AbstractMap<K, V> this
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {        entrySet().clear();
+    public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
+        entrySet().clear();
     }
 
 
diff --git a/src/java.base/share/classes/java/util/AbstractQueue.java b/src/java.base/share/classes/java/util/AbstractQueue.java
index 67de85968221..518de35e56bd 100644
--- a/src/java.base/share/classes/java/util/AbstractQueue.java
+++ b/src/java.base/share/classes/java/util/AbstractQueue.java
@@ -107,7 +107,8 @@ public abstract class AbstractQueue<E>
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {        if (offer(e))
+    public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
+        if (offer(e))
             return true;
         else
             throw new IllegalStateException("Queue full");
@@ -126,7 +127,8 @@ public boolean add(@Growable @GuardSatisfied AbstractQueue<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {        E x = poll();
+    public E remove(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink AbstractQueue<E> this) {
+        E x = poll();
         if (x != null)
             return x;
         else
@@ -162,7 +164,8 @@ public E element(@GuardSatisfied @NonEmpty AbstractQueue<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {        while (poll() != null)
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this) {
+        while (poll() != null)
             ;
     }
 
@@ -197,7 +200,8 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractQueue<E> this)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {        if (c == null)
+    public boolean addAll(@Growable @GuardSatisfied AbstractQueue<E> this, Collection<? extends E> c) {
+        if (c == null)
             throw new NullPointerException();
         if (c == this)
             throw new IllegalArgumentException();
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index d6a689363555..bc52ec9e9f9e 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -179,7 +179,8 @@ public int hashCode(@GuardSatisfied AbstractSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         boolean modified = false;
 
         if (size() > c.size()) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index cf08a7d6292a..aee783f15f80 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -624,7 +624,8 @@ default <T> T[] toArray(Collection<E> this, IntFunction<T[]> generator) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
         while (each.hasNext()) {
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 74b64b742139..5a611bc50287 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -548,7 +548,8 @@ private void addEntry(int hash, K key, V value, int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {        Entry<?,?> tab[] = table;
+    public synchronized @Nullable V remove(@Shrinkable @GuardSatisfied Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+        Entry<?,?> tab[] = table;
         int hash = key.hashCode();
         int index = (hash & 0x7FFFFFFF) % tab.length;
         @SuppressWarnings("unchecked")
@@ -581,7 +582,8 @@ private void addEntry(int hash, K key, V value, int index) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {        for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
+    public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable<K, V> this, Map<? extends K, ? extends V> t) {
+        for (Map.Entry<? extends K, ? extends V> e : t.entrySet())
             put(e.getKey(), e.getValue());
     }
 
@@ -590,7 +592,8 @@ public synchronized void putAll(@Growable @Replaceable @GuardSatisfied Hashtable
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {        Entry<?,?> tab[] = table;
+    public synchronized void clear(@Shrinkable @GuardSatisfied Hashtable<K, V> this) {
+        Entry<?,?> tab[] = table;
         for (int index = tab.length; --index >= 0; )
             tab[index] = null;
         modCount++;
@@ -1006,7 +1009,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {        Objects.requireNonNull(value);
+    public synchronized V putIfAbsent(@Growable Hashtable<K, V> this, K key, V value) {
+        Objects.requireNonNull(value);
 
         // Makes sure the key is not already in the hashtable.
         Entry<?,?> tab[] = table;
@@ -1031,7 +1035,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        Objects.requireNonNull(value);
+    public synchronized boolean remove(@Shrinkable Hashtable<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        Objects.requireNonNull(value);
 
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -1057,7 +1062,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {        Objects.requireNonNull(oldValue);
+    public synchronized boolean replace(@Replaceable Hashtable<K, V> this, K key, V oldValue, V newValue) {
+        Objects.requireNonNull(oldValue);
         Objects.requireNonNull(newValue);
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
@@ -1080,7 +1086,8 @@ public synchronized void replaceAll(@Replaceable Hashtable<K, V> this, BiFunctio
     @Override
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {        Objects.requireNonNull(value);
+    public synchronized V replace(@Replaceable Hashtable<K, V> this, K key, V value) {
+        Objects.requireNonNull(value);
         Entry<?,?> tab[] = table;
         int hash = key.hashCode();
         int index = (hash & 0x7FFFFFFF) % tab.length;
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 193d30e3e48e..aca3dfd6ab7a 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -469,7 +469,8 @@ private boolean containsMapping(@UnknownSignedness @GuardSatisfied @Nullable Obj
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {        final Object k = maskNull(key);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, K key, V value) {
+        final Object k = maskNull(key);
 
         retryAfterResize: for (;;) {
             final Object[] tab = table;
@@ -551,7 +552,8 @@ private boolean resize(int newCapacity) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {        int n = m.size();
+    public void putAll(@Growable @Replaceable @GuardSatisfied IdentityHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+        int n = m.size();
         if (n == 0)
             return;
         if (n > size)
@@ -574,7 +576,8 @@ private boolean resize(int newCapacity) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        Object k = maskNull(key);
+    public @Nullable V remove(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        Object k = maskNull(key);
         Object[] tab = table;
         int len = tab.length;
         int i = hash(k, len);
@@ -671,7 +674,8 @@ private void closeDeletion(int d) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {        modCount++;
+    public void clear(@Shrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+        modCount++;
         Object[] tab = table;
         for (int i = 0; i < tab.length; i++)
             tab[i] = null;
diff --git a/src/java.base/share/classes/java/util/Iterator.java b/src/java.base/share/classes/java/util/Iterator.java
index 798b8538efee..c1dd90bf6868 100644
--- a/src/java.base/share/classes/java/util/Iterator.java
+++ b/src/java.base/share/classes/java/util/Iterator.java
@@ -122,7 +122,8 @@ public interface Iterator<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {        throw new UnsupportedOperationException("remove");
+    default void remove(@Shrinkable @GuardSatisfied @CanShrink Iterator<E> this) {
+        throw new UnsupportedOperationException("remove");
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 90114282fb60..df217822e820 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -908,7 +908,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {        V v = get(key);
+    default @Nullable V putIfAbsent(@Growable Map<K, V> this, K key, V value) {
+        V v = get(key);
         if (v == null) {
             v = put(key, value);
         }
@@ -953,7 +954,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
     @CFComment("nullness: key and value are not @Nullable because this map might not permit null values")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {        Object curValue = get(key);
+    default boolean remove(@Shrinkable Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, @GuardSatisfied @UnknownSignedness Object value) {
+        Object curValue = get(key);
         if (!Objects.equals(curValue, value) ||
             (curValue == null && !containsKey(key))) {
             return false;
@@ -1004,7 +1006,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {        Object curValue = get(key);
+    default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newValue) {
+        Object curValue = get(key);
         if (!Objects.equals(curValue, oldValue) ||
             (curValue == null && !containsKey(key))) {
             return false;
@@ -1053,7 +1056,8 @@ default void replaceAll(@Replaceable Map<K, V> this, BiFunction<? super K, ? sup
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {        V curValue;
+    default @Nullable V replace(@Replaceable Map<K, V> this, K key, V value) {
+        V curValue;
         if (((curValue = get(key)) != null) || containsKey(key)) {
             curValue = put(key, value);
         }
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index c1f051acea37..8df7e5539589 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -113,7 +113,8 @@ public interface SequencedCollection<E> extends Collection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addFirst(@Growable SequencedCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    default void addFirst(@Growable SequencedCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -132,7 +133,8 @@ public interface SequencedCollection<E> extends Collection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addLast(@Growable SequencedCollection<E> this, E e) {        throw new UnsupportedOperationException();
+    default void addLast(@Growable SequencedCollection<E> this, E e) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -186,7 +188,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {        var it = this.iterator();
+    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+        var it = this.iterator();
         E e = it.next();
         it.remove();
         return e;
@@ -209,7 +212,8 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {        var it = this.reversed().iterator();
+    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+        var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
         return e;
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index a7f861d733f7..3f69c702610f 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -200,7 +200,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {        var it = entrySet().iterator();
+    default Map.Entry<K,V> pollFirstEntry(@Shrinkable SequencedMap<K,V> this) {
+        var it = entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
             it.remove();
@@ -226,7 +227,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {        var it = reversed().entrySet().iterator();
+    default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
+        var it = reversed().entrySet().iterator();
         if (it.hasNext()) {
             var entry = new NullableKeyValueHolder<>(it.next());
             it.remove();
@@ -253,7 +255,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {        throw new UnsupportedOperationException();
+    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -273,7 +276,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {        throw new UnsupportedOperationException();
+    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+        throw new UnsupportedOperationException();
     }
 
     /**
@@ -292,7 +296,8 @@ default Map.Entry<K,V> lastEntry() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {        class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
+    default @PolyShrink @Ungrowable SequencedSet<K> sequencedKeySet(@PolyShrink SequencedMap<K,V> this) {
+        class SeqKeySet extends AbstractMap.ViewCollection<K> implements SequencedSet<K> {
             Collection<K> view() {
                 return SequencedMap.this.keySet();
             }
@@ -328,7 +333,8 @@ public int hashCode() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {        class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
+    default @PolyShrink @Ungrowable SequencedCollection<V> sequencedValues(@PolyShrink SequencedMap<K,V> this) {
+        class SeqValues extends AbstractMap.ViewCollection<V> implements SequencedCollection<V> {
             Collection<V> view() {
                 return SequencedMap.this.values();
             }
@@ -355,7 +361,8 @@ public SequencedCollection<V> reversed() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {        class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
+    default @PolyShrink @Ungrowable SequencedSet<Map.@PolyModifiable Entry<K, V>> sequencedEntrySet(@PolyModifiable SequencedMap<K,V> this) {
+        class SeqEntrySet extends AbstractMap.ViewCollection<Map.Entry<K, V>>
                 implements SequencedSet<Map.Entry<K, V>> {
             Collection<Map.Entry<K, V>> view() {
                 return SequencedMap.this.entrySet();
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index 301b50ae5a0d..ab8c4b91a1da 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -82,7 +82,8 @@ public class Stack<E> extends Vector<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E push(@Growable @GuardSatisfied Stack<E> this, E item) {        addElement(item);
+    public E push(@Growable @GuardSatisfied Stack<E> this, E item) {
+        addElement(item);
 
         return item;
     }
@@ -97,7 +98,8 @@ public class Stack<E> extends Vector<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public synchronized E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {        E       obj;
+    public synchronized E pop(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink Stack<E> this) {
+        E       obj;
         int     len = size();
 
         obj = peek();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 8ad6b1cf77aa..462fbe1d3325 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -494,7 +494,8 @@ Entry<K,V> getEntry(Object key) {
     @EnsuresKeyFor(value={"#1"}, map={"this"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {        Object k = maskNull(key);
+    public @Nullable V put(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, K key, V value) {
+        Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
         int i = indexFor(h, tab.length);
@@ -587,7 +588,8 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {        int numKeysToBeAdded = m.size();
+    public void putAll(@Growable @Replaceable @GuardSatisfied WeakHashMap<K, V> this, Map<? extends K, ? extends V> m) {
+        int numKeysToBeAdded = m.size();
         if (numKeysToBeAdded == 0)
             return;
 
@@ -637,7 +639,8 @@ private void transfer(Entry<K,V>[] src, Entry<K,V>[] dest) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {        Object k = maskNull(key);
+    public @Nullable V remove(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key) {
+        Object k = maskNull(key);
         int h = hash(k);
         Entry<K,V>[] tab = getTable();
         int i = indexFor(h, tab.length);
@@ -697,7 +700,8 @@ boolean removeMapping(Object o) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {        // clear out ref queue. We don't need to expunge entries
+    public void clear(@Shrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+        // clear out ref queue. We don't need to expunge entries
         // since table is getting cleared.
         while (queue.poll() != null)
             ;
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index 79b0c90ebf95..0679f8f9ad49 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -485,7 +485,8 @@ public E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {        synchronized (lock) {
+    public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
+        synchronized (lock) {
             Object[] es = getArray();
             E oldValue = elementAt(es, index);
 
@@ -508,7 +509,8 @@ public E set(@Replaceable CopyOnWriteArrayList<E> this, int index, E element) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {        synchronized (lock) {
+    public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             es = Arrays.copyOf(es, len + 1);
@@ -527,7 +529,8 @@ public boolean add(@Growable CopyOnWriteArrayList<E> this, E e) {        synchro
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {        synchronized (lock) {
+    public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             if (index > len || index < 0)
@@ -554,7 +557,8 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {        add(0, e);
+    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
+        add(0, e);
     }
 
     /**
@@ -564,7 +568,8 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {        synchronized (lock) {
+    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
+        synchronized (lock) {
             add(getArray().length, e);
         }
     }
@@ -578,7 +583,8 @@ public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {        synchr
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {        synchronized (lock) {
+    public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int index) {
+        synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
             E oldValue = elementAt(es, index);
@@ -605,7 +611,8 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             if (getArray().length == 0)
                 throw new NoSuchElementException();
             else
@@ -621,7 +628,8 @@ public E removeFirst(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrit
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             int size = getArray().length;
             if (size == 0)
                 throw new NoSuchElementException();
@@ -644,7 +652,8 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink CopyOnWrite
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {        Object[] snapshot = getArray();
+    public boolean remove(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o) {
+        Object[] snapshot = getArray();
         int index = indexOfRange(o, snapshot, 0, snapshot.length);
         return index >= 0 && remove(o, snapshot, index);
     }
@@ -725,7 +734,8 @@ void removeRange(@GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, int fr
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {        Object[] snapshot = getArray();
+    public boolean addIfAbsent(@Growable CopyOnWriteArrayList<E> this, E e) {
+        Object[] snapshot = getArray();
         return indexOfRange(e, snapshot, 0, snapshot.length) < 0
             && addIfAbsent(e, snapshot);
     }
@@ -794,7 +804,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean removeAll(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> c.contains(e));
     }
 
@@ -816,7 +827,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {        Objects.requireNonNull(c);
+    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+        Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
@@ -833,7 +845,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {        Object[] cs = c.toArray();
+    public int addAllAbsent(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
+        Object[] cs = c.toArray();
         if (c.getClass() != ArrayList.class) {
             cs = cs.clone();
         }
@@ -865,7 +878,8 @@ public boolean containsAll(Collection<? extends @UnknownSignedness Object> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {        synchronized (lock) {
+    public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E> this) {
+        synchronized (lock) {
             setArray(new Object[0]);
         }
     }
@@ -882,7 +896,8 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink CopyOnWriteArrayList<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {        Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? extends E> c) {
+        Object[] cs = (c.getClass() == CopyOnWriteArrayList.class) ?
             ((CopyOnWriteArrayList<?>)c).getArray() : c.toArray();
         if (cs.length == 0)
             return false;
@@ -920,7 +935,8 @@ public boolean addAll(@Growable CopyOnWriteArrayList<E> this, Collection<? exten
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {        Object[] cs = c.toArray();
+    public boolean addAll(@Growable CopyOnWriteArrayList<E> this, int index, Collection<? extends E> c) {
+        Object[] cs = c.toArray();
         synchronized (lock) {
             Object[] es = getArray();
             int len = es.length;
@@ -961,7 +977,8 @@ public void forEach(Consumer<? super E> action) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {        Objects.requireNonNull(filter);
+    public boolean removeIf(@Shrinkable @CanShrink CopyOnWriteArrayList<E> this, Predicate<? super E> filter) {
+        Objects.requireNonNull(filter);
         return bulkRemove(filter);
     }
 
@@ -1035,7 +1052,8 @@ void replaceAllRange(UnaryOperator<E> operator, int i, int end) {
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {        synchronized (lock) {
+    public void sort(@Replaceable CopyOnWriteArrayList<E> this, Comparator<? super E> c) {
+        synchronized (lock) {
             sortRange(c, 0, getArray().length);
         }
     }

From f00d52b4df7254fe3a331c132b1d522bea2fd4e9 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Tue, 26 May 2026 15:44:30 -0700
Subject: [PATCH 091/119] add iteratorPolyMod to Collections.

---
 src/java.base/share/classes/java/util/Collections.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 3e21cc2578b1..7a710a5d93b2 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -1090,7 +1090,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1334,7 +1334,7 @@ public E removeLast() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@PolyNonEmpty Set<? extends T> s) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;

From a741392ca01a0354f82dc7a700483349b6b1d3df Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Tue, 26 May 2026 18:18:40 -0700
Subject: [PATCH 092/119] Better diagnostics

---
 .azure/azure-pipelines.yml    |  2 ++
 .azure/azure-pipelines.yml.m4 |  2 ++
 .github/workflows/ci.yml      | 10 ++--------
 .github/workflows/ci.yml.m4   | 10 ++--------
 4 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/.azure/azure-pipelines.yml b/.azure/azure-pipelines.yml
index b8c08d344110..4f935f4e0925 100644
--- a/.azure/azure-pipelines.yml
+++ b/.azure/azure-pipelines.yml
@@ -16,6 +16,7 @@ jobs:
           pwd
           ls -al
           env | sort
+          set
         displayName: show environment
       - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
         displayName: configure
@@ -41,6 +42,7 @@ jobs:
           pwd
           ls -al
           env | sort
+          set
         displayName: show environment
       - bash: |
           set -ex
diff --git a/.azure/azure-pipelines.yml.m4 b/.azure/azure-pipelines.yml.m4
index 1dc0ed8481b9..4ad527e5a876 100644
--- a/.azure/azure-pipelines.yml.m4
+++ b/.azure/azure-pipelines.yml.m4
@@ -19,6 +19,7 @@ jobs:
           pwd
           ls -al
           env | sort
+          set
         displayName: show environment
       - bash: pwd && ls && bash ./configure --with-jtreg=/usr/share/jtreg --disable-warnings-as-errors
         displayName: configure
@@ -44,6 +45,7 @@ jobs:
           pwd
           ls -al
           env | sort
+          set
         displayName: show environment
       - bash: |
           set -ex
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5f2599aa288d..6d7f8d909952 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,10 +38,7 @@ jobs:
           git config --get remote.origin.url || true
           pwd
           ls -al
-          echo "HOME=${HOME}"
-          echo "USER=${USER}"
-          echo "SHELL=${SHELL}"
-          echo "GITHUB_WORKSPACE=${GITHUB_WORKSPACE}"
+          set
       - name: configure
         run: |
           pwd
@@ -65,10 +62,7 @@ jobs:
           git config --get remote.origin.url || true
           pwd
           ls -al
-          echo "HOME=${HOME}"
-          echo "USER=${USER}"
-          echo "SHELL=${SHELL}"
-          echo "GITHUB_WORKSPACE=${GITHUB_WORKSPACE}"
+          set
       - name: clone git-scripts
         run: |
           set -ex
diff --git a/.github/workflows/ci.yml.m4 b/.github/workflows/ci.yml.m4
index ed479aee7960..c61b6642a429 100644
--- a/.github/workflows/ci.yml.m4
+++ b/.github/workflows/ci.yml.m4
@@ -42,10 +42,7 @@ jobs:
           git config --get remote.origin.url || true
           pwd
           ls -al
-          echo "HOME=${HOME}"
-          echo "USER=${USER}"
-          echo "SHELL=${SHELL}"
-          echo "GITHUB_WORKSPACE=${GITHUB_WORKSPACE}"
+          set
       - name: configure
         run: |
           pwd
@@ -69,10 +66,7 @@ jobs:
           git config --get remote.origin.url || true
           pwd
           ls -al
-          echo "HOME=${HOME}"
-          echo "USER=${USER}"
-          echo "SHELL=${SHELL}"
-          echo "GITHUB_WORKSPACE=${GITHUB_WORKSPACE}"
+          set
       - name: clone git-scripts
         run: |
           set -ex

From 6fcedc69d38405bdb145d756f8aee4ef787fd20a Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Wed, 27 May 2026 07:37:34 -0700
Subject: [PATCH 093/119] Fix bad merge

---
 .../share/classes/java/lang/Iterable.java     |  3 +-
 .../classes/java/util/AbstractCollection.java | 17 +++----
 .../share/classes/java/util/AbstractList.java | 17 +++----
 .../share/classes/java/util/AbstractMap.java  | 17 +++----
 .../java/util/AbstractSequentialList.java     |  7 +--
 .../share/classes/java/util/AbstractSet.java  |  5 +-
 .../share/classes/java/util/Collection.java   | 28 ++++++-----
 .../share/classes/java/util/Collections.java  | 47 ++++++++++---------
 .../share/classes/java/util/HashMap.java      |  1 +
 .../share/classes/java/util/HashSet.java      |  1 +
 .../classes/java/util/LinkedHashSet.java      |  1 +
 .../share/classes/java/util/List.java         | 32 +++++++------
 .../share/classes/java/util/Map.java          | 28 +++++------
 .../share/classes/java/util/Set.java          | 24 +++++-----
 .../util/concurrent/ConcurrentHashMap.java    |  6 ++-
 .../java/util/concurrent/ConcurrentMap.java   |  5 +-
 .../util/concurrent/LinkedTransferQueue.java  | 17 +++----
 .../util/concurrent/SynchronousQueue.java     | 17 +++----
 18 files changed, 148 insertions(+), 125 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/Iterable.java b/src/java.base/share/classes/java/lang/Iterable.java
index 2b0cacbbfbc6..8a6b8658e80e 100644
--- a/src/java.base/share/classes/java/lang/Iterable.java
+++ b/src/java.base/share/classes/java/lang/Iterable.java
@@ -25,6 +25,7 @@
 package java.lang;
 
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.common.aliasing.qual.NonLeaked;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -51,7 +52,7 @@ public interface Iterable<T> {
      *
      * @return an Iterator.
      */
-    @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@PolyGrowShrink @PolyNonEmpty Iterable<T> this);
+    @MaybeModifiable @PolyGrowShrink @PolyNonEmpty Iterator<T> iterator(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Iterable<T> this);
 
     /**
      * Performs the given action for each element of the {@code Iterable}
diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 7e78d94dffc5..68cc5df6677b 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -105,10 +106,10 @@ protected AbstractCollection() {
      * @return an iterator over the elements contained in this collection
      */
     @SideEffectFree
-    public abstract @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
+    public abstract @MaybeModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty AbstractCollection<E> this);
 
     @Pure
-    public abstract @NonNegative int size(@GuardSatisfied AbstractCollection<E> this);
+    public abstract @NonNegative int size(@MaybeModifiable @GuardSatisfied AbstractCollection<E> this);
 
     /**
      * {@inheritDoc}
@@ -118,7 +119,7 @@ protected AbstractCollection() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@GuardSatisfied AbstractCollection<E> this) {
+    public boolean isEmpty(@MaybeModifiable @GuardSatisfied AbstractCollection<E> this) {
         return size() == 0;
     }
 
@@ -134,7 +135,7 @@ public boolean isEmpty(@GuardSatisfied AbstractCollection<E> this) {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean contains(@MaybeModifiable @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext())
@@ -172,7 +173,7 @@ public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisf
      * }</pre>
      */
     @SideEffectFree
-    public @PolyNull @PolySigned Object[] toArray(AbstractCollection<@PolyNull @PolySigned E> this) {
+    public @PolyNull @PolySigned Object[] toArray(@MaybeModifiable AbstractCollection<@PolyNull @PolySigned E> this) {
         // Estimate size of array; be prepared to see more or fewer elements
         Object[] r = new Object[size()];
         Iterator<E> it = iterator();
@@ -213,7 +214,7 @@ public boolean contains(@GuardSatisfied AbstractCollection<E> this, @GuardSatisf
      * @throws NullPointerException {@inheritDoc}
      */
     @SuppressWarnings("unchecked")
-    public <T> @Nullable T [] toArray(@PolyNull T [] a) {
+    public <T> @Nullable T [] toArray(@MaybeModifiable @PolyNull T [] a) {
         // Estimate size of array; be prepared to see more or fewer elements
         int size = size();
         T[] r = a.length >= size ? a :
@@ -346,7 +347,7 @@ public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Ab
      * @see #contains(Object)
      */
     @Pure
-    public boolean containsAll(@GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
+    public boolean containsAll(@MaybeModifiable @GuardSatisfied AbstractCollection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c) {
         for (Object e : c)
             if (!contains(e))
                 return false;
@@ -496,7 +497,7 @@ public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Abstra
      * @return a string representation of this collection
      */
     @SideEffectFree
-    public String toString(@GuardSatisfied AbstractCollection<E> this) {
+    public String toString(@MaybeModifiable @GuardSatisfied AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         if (! it.hasNext())
             return "[]";
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index db68cad822a3..ddcb01da7045 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -152,7 +153,7 @@ public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public abstract E get(@GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
+    public abstract E get(@MaybeModifiable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index);
 
     /**
      * {@inheritDoc}
@@ -226,7 +227,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      */
     @Pure
     @StaticallyExecutable
-    public @GTENegativeOne int indexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int indexOf(@MaybeModifiable @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator();
         if (o==null) {
             while (it.hasNext())
@@ -254,7 +255,7 @@ public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @In
      */
     @Pure
     @StaticallyExecutable
-    public @GTENegativeOne int lastIndexOf(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public @GTENegativeOne int lastIndexOf(@MaybeModifiable @GuardSatisfied AbstractList<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         ListIterator<E> it = listIterator(size());
         if (o==null) {
             while (it.hasPrevious())
@@ -347,7 +348,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
         return new Itr();
     }
 
@@ -359,7 +360,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
         return listIterator(0);
     }
 
@@ -386,7 +387,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
@@ -602,7 +603,7 @@ static void subListRangeCheck(int fromIndex, int toIndex, int size) {
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@MaybeModifiable @GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
         if (!(o instanceof List))
@@ -630,7 +631,7 @@ public boolean equals(@GuardSatisfied AbstractList<E> this, @GuardSatisfied @Nul
      * @return the hash code value for this list
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractList<E> this) {
+    public int hashCode(@MaybeModifiable @GuardSatisfied AbstractList<E> this) {
         int hashCode = 1;
         for (E e : this)
             hashCode = 31*hashCode + (e==null ? 0 : e.hashCode());
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 573b3c582d56..8751957d9967 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -115,7 +116,7 @@ protected AbstractMap() {
      * This implementation returns {@code entrySet().size()}.
      */
     @Pure
-    public @NonNegative int size(@GuardSatisfied AbstractMap<K, V> this) {
+    public @NonNegative int size(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this) {
         return entrySet().size();
     }
 
@@ -127,7 +128,7 @@ protected AbstractMap() {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    public boolean isEmpty(@GuardSatisfied AbstractMap<K, V> this) {
+    public boolean isEmpty(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this) {
         return size() == 0;
     }
 
@@ -145,7 +146,7 @@ public boolean isEmpty(@GuardSatisfied AbstractMap<K, V> this) {
      * @throws NullPointerException {@inheritDoc}
      */
     @Pure
-    public boolean containsValue(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
+    public boolean containsValue(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object value) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (value==null) {
             while (i.hasNext()) {
@@ -179,7 +180,7 @@ public boolean containsValue(@GuardSatisfied AbstractMap<K, V> this, @GuardSatis
      */
     @Pure
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
-    public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
+    public boolean containsKey(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @UnknownSignedness Object key) {
         Iterator<Map.Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -212,7 +213,7 @@ public boolean containsKey(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfi
      * @throws NullPointerException          {@inheritDoc}
      */
     @Pure
-    public @Nullable V get(@GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
+    public @Nullable V get(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this, @UnknownSignedness @GuardSatisfied Object key) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (key==null) {
             while (i.hasNext()) {
@@ -554,7 +555,7 @@ public boolean contains(@UnknownSignedness Object v) {
      * @return {@code true} if the specified object is equal to this map
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -601,7 +602,7 @@ public boolean equals(@GuardSatisfied AbstractMap<K, V> this, @GuardSatisfied @N
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractMap<K, V> this) {
+    public int hashCode(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this) {
         int h = 0;
         for (Entry<K, V> entry : entrySet())
             h += entry.hashCode();
@@ -621,7 +622,7 @@ public int hashCode(@GuardSatisfied AbstractMap<K, V> this) {
      * @return a string representation of this map
      */
     @SideEffectFree
-    public String toString(@GuardSatisfied AbstractMap<K, V> this) {
+    public String toString(@MaybeModifiable @GuardSatisfied AbstractMap<K, V> this) {
         Iterator<Entry<K,V>> i = entrySet().iterator();
         if (! i.hasNext())
             return "{}";
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 17fd69a3b152..5dd09a930be1 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -105,7 +106,7 @@ protected AbstractSequentialList() {
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
     @Pure
-    public E get(@GuardSatisfied AbstractSequentialList<E> this, int index) {
+    public E get(@MaybeModifiable @GuardSatisfied AbstractSequentialList<E> this, int index) {
         try {
             return listIterator(index).next();
         } catch (NoSuchElementException exc) {
@@ -267,7 +268,7 @@ public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequent
      * @return an iterator over the elements in this list (in proper sequence)
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractSequentialList<E> this) {
         return listIterator();
     }
 
@@ -281,5 +282,5 @@ public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequent
      *         sequence)
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public abstract @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractSequentialList<E> this, int index);
+    public abstract @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractSequentialList<E> this, int index);
 }
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index bc52ec9e9f9e..fa3f8e9e2d48 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.signedness.qual.UnknownSignedness;
@@ -95,7 +96,7 @@ protected AbstractSet() {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    public boolean equals(@GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
+    public boolean equals(@MaybeModifiable @GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Nullable Object o) {
         if (o == this)
             return true;
 
@@ -129,7 +130,7 @@ public boolean equals(@GuardSatisfied AbstractSet<E> this, @GuardSatisfied @Null
      * @see Set#equals(Object)
      */
     @Pure
-    public int hashCode(@GuardSatisfied AbstractSet<E> this) {
+    public int hashCode(@MaybeModifiable @GuardSatisfied AbstractSet<E> this) {
         int h = 0;
         Iterator<E> i = iterator();
         while (i.hasNext()) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index aee783f15f80..0e80771451f7 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -292,7 +293,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return the number of elements in this collection
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Collection<E> this);
+    @NonNegative int size(@MaybeModifiable @GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains no elements.
@@ -301,7 +302,7 @@ public interface Collection<E> extends Iterable<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Collection<E> this);
+    boolean isEmpty(@MaybeModifiable @GuardSatisfied Collection<E> this);
 
     /**
      * Returns {@code true} if this collection contains the specified element.
@@ -324,7 +325,7 @@ public interface Collection<E> extends Iterable<E> {
                 "(though I think a nicer specification would be to return false in that case)"})
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@MaybeModifiable @GuardSatisfied Collection<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this collection.  There are no
@@ -335,7 +336,7 @@ public interface Collection<E> extends Iterable<E> {
      * @return an {@code Iterator} over the elements in this collection
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Collection<E> this);
+    @MaybeModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<E> this);
 
     /**
      * Returns an array containing all of the elements in this collection.
@@ -364,7 +365,7 @@ public interface Collection<E> extends Iterable<E> {
     "methods, because the most useful type for toArray is not expressible",
     "in the surface syntax that the nullness annotations support."})
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(Collection<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@MaybeModifiable Collection<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this collection;
@@ -417,7 +418,8 @@ public interface Collection<E> extends Iterable<E> {
      *         runtime component type} of the specified array
      * @throws NullPointerException if the specified array is null
      */
-    <T extends @UnknownSignedness Object> @Nullable T[] toArray(Collection<E> this, @PolyNull T[] a);
+    @SideEffectFree
+    <T extends @UnknownSignedness Object> @Nullable T[] toArray(@MaybeModifiable Collection<E> this, @PolyNull T[] a);
 
     /**
      * Returns an array containing all of the elements in this collection,
@@ -455,7 +457,7 @@ public interface Collection<E> extends Iterable<E> {
      * @since 11
      */
     @SideEffectFree
-    default <T> T[] toArray(Collection<E> this, IntFunction<T[]> generator) {
+    default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> generator) {
         return toArray(generator.apply(0));
     }
 
@@ -543,7 +545,7 @@ default <T> T[] toArray(Collection<E> this, IntFunction<T[]> generator) {
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@MaybeModifiable @GuardSatisfied Collection<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this collection
@@ -709,7 +711,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      * @see List#equals(Object)
      */
     @Pure
-    boolean equals(@GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
+    boolean equals(@MaybeModifiable @GuardSatisfied Collection<E> this, @GuardSatisfied @Nullable @UnknownSignedness Object o);
 
     /**
      * Returns the hash code value for this collection.  While the
@@ -727,7 +729,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      * @see Object#equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied Collection<E> this);
+    int hashCode(@MaybeModifiable @GuardSatisfied Collection<E> this);
 
     /**
      * Creates a {@link Spliterator} over the elements in this collection.
@@ -781,7 +783,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      */
     @SideEffectFree
     @Override
-    default Spliterator<E> spliterator(Collection<E> this) {
+    default Spliterator<E> spliterator(@MaybeModifiable Collection<E> this) {
         return Spliterators.spliterator(this, 0);
     }
 
@@ -801,7 +803,7 @@ default Spliterator<E> spliterator(Collection<E> this) {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default @PolyNonEmpty Stream<E> stream(@PolyNonEmpty Collection<E> this) {
+    default @PolyNonEmpty Stream<E> stream(@MaybeModifiable @PolyNonEmpty Collection<E> this) {
         return StreamSupport.stream(spliterator(), false);
     }
 
@@ -823,7 +825,7 @@ default Spliterator<E> spliterator(Collection<E> this) {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default Stream<E> parallelStream(Collection<E> this) {
+    default Stream<E> parallelStream(@MaybeModifiable Collection<E> this) {
         return StreamSupport.stream(spliterator(), true);
     }
 }
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 0ea0478261b5..1426e5d2cd0b 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -249,7 +250,7 @@ public static <T> void sort(@IteratorPolyMod @Replaceable List<T> list, @Nullabl
      *         with the elements of the list.
      */
     public static <T>
-    int binarySearch(List<? extends Comparable<? super T>> list, T key) {
+    int binarySearch(@MaybeModifiable List<? extends Comparable<? super T>> list, T key) {
         if (list instanceof RandomAccess || list.size()<BINARYSEARCH_THRESHOLD)
             return Collections.indexedBinarySearch(list, key);
         else
@@ -257,7 +258,7 @@ int binarySearch(List<? extends Comparable<? super T>> list, T key) {
     }
 
     private static <T>
-    int indexedBinarySearch(List<? extends Comparable<? super T>> list, T key) {
+    int indexedBinarySearch(@MaybeModifiable List<? extends Comparable<? super T>> list, T key) {
         int low = 0;
         int high = list.size()-1;
 
@@ -277,7 +278,7 @@ else if (cmp > 0)
     }
 
     private static <T>
-    int iteratorBinarySearch(List<? extends Comparable<? super T>> list, T key)
+    int iteratorBinarySearch(@MaybeModifiable List<? extends Comparable<? super T>> list, T key)
     {
         int low = 0;
         int high = list.size()-1;
@@ -354,7 +355,7 @@ private static <T> T get(ListIterator<? extends T> i, int index) {
      *         elements of the list using this comparator.
      */
     @SuppressWarnings("unchecked")
-    public static <T> int binarySearch(List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
+    public static <T> int binarySearch(@MaybeModifiable List<? extends T> list, T key, @Nullable Comparator<? super T> c) {
         if (c==null)
             return binarySearch((List<? extends Comparable<? super T>>) list, key);
 
@@ -364,7 +365,7 @@ public static <T> int binarySearch(List<? extends T> list, T key, @Nullable Comp
             return Collections.iteratorBinarySearch(list, key, c);
     }
 
-    private static <T> int indexedBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int indexedBinarySearch(@MaybeModifiable List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
 
@@ -383,7 +384,7 @@ else if (cmp > 0)
         return -(low + 1);  // key not found
     }
 
-    private static <T> int iteratorBinarySearch(List<? extends T> l, T key, Comparator<? super T> c) {
+    private static <T> int iteratorBinarySearch(@MaybeModifiable List<? extends T> l, T key, Comparator<? super T> c) {
         int low = 0;
         int high = l.size()-1;
         ListIterator<? extends T> i = l.listIterator();
@@ -618,7 +619,7 @@ public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<?
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, List<? extends T> src) {
+    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, @MaybeModifiable List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -661,7 +662,7 @@ public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest,
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T min(Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T min(@MaybeModifiable Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -699,7 +700,7 @@ public static <T extends Object & Comparable<? super T>> T min(Collection<? exte
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T min(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T min(@MaybeModifiable Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)min((Collection<Comparable<Object>>) coll);
 
@@ -738,7 +739,7 @@ public static <T> T min(Collection<? extends T> coll, @Nullable Comparator<? sup
      */
     @Pure
     @StaticallyExecutable
-    public static <T extends Object & Comparable<? super T>> T max(Collection<? extends T> coll) {
+    public static <T extends Object & Comparable<? super T>> T max(@MaybeModifiable Collection<? extends T> coll) {
         Iterator<? extends T> i = coll.iterator();
         T candidate = i.next();
 
@@ -776,7 +777,7 @@ public static <T extends Object & Comparable<? super T>> T max(Collection<? exte
     @SuppressWarnings({"unchecked", "rawtypes"})
     @Pure
     @StaticallyExecutable
-    public static <T> T max(Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
+    public static <T> T max(@MaybeModifiable Collection<? extends T> coll, @Nullable Comparator<? super T> comp) {
         if (comp==null)
             return (T)max((Collection<Comparable<Object>>) coll);
 
@@ -974,7 +975,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @Pure
     @StaticallyExecutable
-    public static @GTENegativeOne int indexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int indexOfSubList(@MaybeModifiable @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -1029,7 +1030,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @Pure
     @StaticallyExecutable
-    public static @GTENegativeOne int lastIndexOfSubList(@GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
+    public static @GTENegativeOne int lastIndexOfSubList(@MaybeModifiable @GuardSatisfied List<?> source, @GuardSatisfied List<?> target) {
         int sourceSize = source.size();
         int targetSize = target.size();
         int maxCandidate = sourceSize - targetSize;
@@ -1093,7 +1094,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyMod @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1339,7 +1340,7 @@ public E removeLast() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyMod @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@PolyNonEmpty Set<? extends T> s) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@MaybeModifiable @PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;
@@ -1433,7 +1434,7 @@ public SequencedSet<E> reversed() {
      *        returned.
      * @return an unmodifiable view of the specified sorted set.
      */
-    public static <T> @Unmodifiable @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@PolyNonEmpty SortedSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty SortedSet<T> unmodifiableSortedSet(@MaybeModifiable @PolyNonEmpty SortedSet<T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSortedSet.class) {
             return s;
@@ -1497,7 +1498,7 @@ public SortedSet<E> tailSet(E fromElement) {
      * @return an unmodifiable view of the specified navigable set
      * @since 1.8
      */
-    public static <T> @Unmodifiable @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@PolyNonEmpty NavigableSet<T> s) {
+    public static <T> @Unmodifiable @PolyNonEmpty NavigableSet<T> unmodifiableNavigableSet(@MaybeModifiable @PolyNonEmpty NavigableSet<T> s) {
         if (s.getClass() == UnmodifiableNavigableSet.class) {
             return s;
         }
@@ -1610,7 +1611,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return an unmodifiable view of the specified list.
      */
     @SuppressWarnings("unchecked")
-    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
+    public static <T> @Unmodifiable @PolyGrowShrink @PolyNonEmpty List<T> unmodifiableList(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty List<? extends T> list) {
         if (list.getClass() == UnmodifiableList.class || list.getClass() == UnmodifiableRandomAccessList.class) {
            return (List<T>) list;
         }
@@ -1801,7 +1802,7 @@ private Object writeReplace() {
      * @return an unmodifiable view of the specified map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty Map<K,V> unmodifiableMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty Map<K,V> unmodifiableMap(@MaybeModifiable @PolyNonEmpty Map<? extends K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableMap.class) {
             return (Map<K,V>) m;
@@ -2284,7 +2285,7 @@ public V putLast(K k, V v) {
      * @return an unmodifiable view of the specified sorted map.
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty SortedMap<K,V> unmodifiableSortedMap(@MaybeModifiable @PolyNonEmpty SortedMap<K, ? extends V> m) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (m.getClass() == UnmodifiableSortedMap.class) {
             return (SortedMap<K,V>) m;
@@ -2340,7 +2341,7 @@ public SortedMap<K,V> tailMap(K fromKey)
      * @since 1.8
      */
     @SuppressWarnings("unchecked")
-    public static <K,V> @Unmodifiable @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@PolyNonEmpty NavigableMap<K, ? extends V> m) {
+    public static <K,V> @Unmodifiable @PolyNonEmpty NavigableMap<K,V> unmodifiableNavigableMap(@MaybeModifiable @PolyNonEmpty NavigableMap<K, ? extends V> m) {
         if (m.getClass() == UnmodifiableNavigableMap.class) {
             return (NavigableMap<K,V>) m;
         }
@@ -6386,7 +6387,7 @@ static boolean eq(Object o1, Object o2) {
      * @throws NullPointerException if {@code c} is null
      * @since 1.5
      */
-    public static @NonNegative int frequency(Collection<?> c, @Nullable Object o) {
+    public static @NonNegative int frequency(@MaybeModifiable Collection<?> c, @Nullable Object o) {
         int result = 0;
         if (o == null) {
             for (Object e : c)
@@ -6438,7 +6439,7 @@ static boolean eq(Object o1, Object o2) {
      * (<a href="Collection.html#optional-restrictions">optional</a>)
      * @since 1.5
      */
-    public static boolean disjoint(Collection<?> c1, Collection<?> c2) {
+    public static boolean disjoint(@MaybeModifiable Collection<?> c1, @MaybeModifiable Collection<?> c2) {
         // The collection to be used for contains(). Preference is given to
         // the collection who's contains() has lower O() complexity.
         Collection<?> contains = c2;
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 6226d56444b9..e2e56d733575 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 0ee14ae1795f..5d00823e2713 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 58cc8d682977..b0cd7488430c 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -27,6 +27,7 @@
 
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 463bbb37c970..1d97736cfd09 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -35,6 +35,7 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -181,7 +182,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return the number of elements in this list
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied List<E> this);
+    @NonNegative int size(@MaybeModifiable @GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains no elements.
@@ -190,7 +191,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied List<E> this);
+    boolean isEmpty(@MaybeModifiable @GuardSatisfied List<E> this);
 
     /**
      * Returns {@code true} if this list contains the specified element.
@@ -209,7 +210,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied List<E> this, @UnknownSignedness Object o);
+    boolean contains(@MaybeModifiable @GuardSatisfied List<E> this, @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this list in proper sequence.
@@ -217,7 +218,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper
@@ -236,7 +237,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see Arrays#asList(Object[])
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(List<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@MaybeModifiable List<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this list in
@@ -277,7 +278,8 @@ public interface List<E> extends SequencedCollection<E> {
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    <T extends @UnknownSignedness Object> @Nullable T[] toArray(List<E> this, @PolyNull T[] a);
+    @SideEffectFree
+    <T extends @UnknownSignedness Object> @Nullable T[] toArray(@MaybeModifiable List<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -356,7 +358,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @see #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@MaybeModifiable @GuardSatisfied List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Appends all of the elements in the specified collection to the end of
@@ -601,7 +603,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @return {@code true} if the specified object is equal to this list
      */
     @Pure
-    boolean equals(@GuardSatisfied List<E> this, @Nullable Object o);
+    boolean equals(@MaybeModifiable @GuardSatisfied List<E> this, @Nullable Object o);
 
     /**
      * Returns the hash code value for this list.  The hash code of a list
@@ -621,7 +623,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @see #equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied List<E> this);
+    int hashCode(@MaybeModifiable @GuardSatisfied List<E> this);
 
 
     // Positional Access Operations
@@ -635,7 +637,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         ({@code index < 0 || index >= size()})
      */
     @Pure
-    E get(@GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
+    E get(@MaybeModifiable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index);
 
     /**
      * Replaces the element at the specified position in this list with the
@@ -723,7 +725,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int indexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int indexOf(@MaybeModifiable @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns the index of the last occurrence of the specified element
@@ -743,7 +745,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      *         (<a href="Collection.html#optional-restrictions">optional</a>)
      */
     @Pure
-    @GTENegativeOne int lastIndexOf(@GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    @GTENegativeOne int lastIndexOf(@MaybeModifiable @GuardSatisfied List<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
 
     // List Iterators
@@ -755,7 +757,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @return a list iterator over the elements in this list (in proper
      *         sequence)
      */
-    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
 
     /**
      * Returns a list iterator over the elements in this list (in proper
@@ -772,7 +774,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
+    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
 
     // View
 
@@ -1286,7 +1288,7 @@ default List<E> reversed() {
      * @since 10
      */
     @SideEffectFree
-    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty List<E> copyOf(@MaybeModifiable @PolyNonEmpty Collection<? extends E> coll) {
         return ImmutableCollections.listCopy(coll);
     }
 }
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 591c8478294b..4ea0da0de19a 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -204,7 +205,7 @@ public interface Map<K, V> {
      * @return the number of key-value mappings in this map
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Map<K, V> this);
+    @NonNegative int size(@MaybeModifiable @GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains no key-value mappings.
@@ -213,7 +214,7 @@ public interface Map<K, V> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Map<K, V> this);
+    boolean isEmpty(@MaybeModifiable @GuardSatisfied Map<K, V> this);
 
     /**
      * Returns {@code true} if this map contains a mapping for the specified
@@ -234,7 +235,7 @@ public interface Map<K, V> {
     @EnsuresKeyForIf(expression={"#1"}, result=true, map={"this"})
     @Pure
     @EnsuresNonEmptyIf(result=true, expression={"this"})
-    boolean containsKey(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
+    boolean containsKey(@MaybeModifiable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key);
 
     /**
      * Returns {@code true} if this map maps one or more keys to the
@@ -254,7 +255,7 @@ public interface Map<K, V> {
      */
     @Pure
     @EnsuresNonEmptyIf(result=true, expression={"this"})
-    boolean containsValue(@GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
+    boolean containsValue(@MaybeModifiable @GuardSatisfied Map<K, V> this, @GuardSatisfied @UnknownSignedness Object value);
 
     /**
      * Returns the value to which the specified key is mapped,
@@ -281,7 +282,7 @@ public interface Map<K, V> {
      *         does not permit null keys ({@linkplain Collection##optional-restrictions optional})
      */
     @Pure
-    @Nullable V get(@GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
+    @Nullable V get(@MaybeModifiable @GuardSatisfied Map<K, V> this, @UnknownSignedness @GuardSatisfied Object key);
 
     // Modification Operations
 
@@ -511,7 +512,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        K getKey(Map.@GuardSatisfied Entry<K, V> this);
+        K getKey(Map.@MaybeModifiable @GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns the value corresponding to this entry.  If the mapping
@@ -524,7 +525,7 @@ interface Entry<K, V> {
          *         removed from the backing map.
          */
         @Pure
-        V getValue(Map.@GuardSatisfied Entry<K, V> this);
+        V getValue(Map.@MaybeModifiable @GuardSatisfied Entry<K, V> this);
 
         /**
          * Replaces the value corresponding to this entry with the specified
@@ -568,7 +569,7 @@ interface Entry<K, V> {
          *         entry
          */
         @Pure
-        boolean equals(Map.@GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
+        boolean equals(Map.@MaybeModifiable @GuardSatisfied Entry<K, V> this, @GuardSatisfied @Nullable Object o);
 
         /**
          * Returns the hash code value for this map entry.  The hash code
@@ -587,7 +588,7 @@ interface Entry<K, V> {
          * @see #equals(Object)
          */
         @Pure
-        int hashCode(Map.@GuardSatisfied Entry<K, V> this);
+        int hashCode(Map.@MaybeModifiable @GuardSatisfied Entry<K, V> this);
 
         /**
          * Returns a comparator that compares {@link Map.Entry} in natural order on key.
@@ -688,8 +689,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
          */
         @SuppressWarnings("unchecked")
         @SideEffectFree
-        public static <K extends @NonNull Object, V extends @NonNull Object> 
-        Map.@Unmodifiable Entry<K, V> copyOf(Map.Entry<? extends K, ? extends V> e) {
+        public static <K extends @NonNull Object, V extends @NonNull Object> Map.@Unmodifiable Entry<K, V> copyOf(Map.@MaybeModifiable Entry<? extends K, ? extends V> e) {
             Objects.requireNonNull(e);
             if (e instanceof KeyValueHolder) {
                 return (Map.Entry<K, V>) e;
@@ -714,7 +714,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @return {@code true} if the specified object is equal to this map
      */
     @Pure
-    boolean equals(@GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@MaybeModifiable @GuardSatisfied Map<K, V> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this map.  The hash code of a map is
@@ -730,7 +730,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @see #equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied Map<K, V> this);
+    int hashCode(@MaybeModifiable @GuardSatisfied Map<K, V> this);
 
     // Defaultable methods
 
@@ -1831,7 +1831,7 @@ default boolean replace(@Replaceable Map<K, V> this, K key, V oldValue, V newVal
      */
     @SuppressWarnings({"rawtypes","unchecked"})
     @SideEffectFree
-    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@PolyNonEmpty Map<? extends K, ? extends V> map) {
+    static <K extends @NonNull Object, V extends @NonNull Object> @Unmodifiable @PolyNonEmpty Map<K, V> copyOf(@MaybeModifiable @PolyNonEmpty Map<? extends K, ? extends V> map) {
         if (map instanceof ImmutableCollections.AbstractImmutableMap) {
             return (Map<K,V>)map;
         } else if (map.isEmpty()) { // Implicit nullcheck of map
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index b55c022a766f..2e6095c586f7 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
@@ -146,7 +147,7 @@ public interface Set<E> extends Collection<E> {
      * @return the number of elements in this set (its cardinality)
      */
     @Pure
-    @NonNegative int size(@GuardSatisfied Set<E> this);
+    @NonNegative int size(@MaybeModifiable @GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains no elements.
@@ -155,7 +156,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = false, expression = "this")
-    boolean isEmpty(@GuardSatisfied Set<E> this);
+    boolean isEmpty(@MaybeModifiable @GuardSatisfied Set<E> this);
 
     /**
      * Returns {@code true} if this set contains the specified element.
@@ -174,7 +175,7 @@ public interface Set<E> extends Collection<E> {
      */
     @Pure
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean contains(@GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
+    boolean contains(@MaybeModifiable @GuardSatisfied Set<E> this, @GuardSatisfied @UnknownSignedness Object o);
 
     /**
      * Returns an iterator over the elements in this set.  The elements are
@@ -184,7 +185,7 @@ public interface Set<E> extends Collection<E> {
      * @return an iterator over the elements in this set
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty Set<E> this);
+    @MaybeModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Set<E> this);
 
     /**
      * Returns an array containing all of the elements in this set.
@@ -203,7 +204,7 @@ public interface Set<E> extends Collection<E> {
      * @return an array containing all the elements in this set
      */
     @SideEffectFree
-    @PolyNull @PolySigned Object[] toArray(Set<@PolyNull @PolySigned E> this);
+    @PolyNull @PolySigned Object[] toArray(@MaybeModifiable Set<@PolyNull @PolySigned E> this);
 
     /**
      * Returns an array containing all of the elements in this set; the
@@ -247,7 +248,8 @@ public interface Set<E> extends Collection<E> {
      *         set
      * @throws NullPointerException if the specified array is null
      */
-    <T> @Nullable T [] toArray(Set<E> this, @PolyNull T[] a);
+    @SideEffectFree
+    <T> @Nullable T [] toArray(@MaybeModifiable Set<E> this, @PolyNull T[] a);
 
 
     // Modification Operations
@@ -336,7 +338,7 @@ public interface Set<E> extends Collection<E> {
      * @see    #contains(Object)
      */
     @Pure
-    boolean containsAll(@GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
+    boolean containsAll(@MaybeModifiable @GuardSatisfied Set<E> this, @GuardSatisfied Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Adds all of the elements in the specified collection to this set if
@@ -442,7 +444,7 @@ public interface Set<E> extends Collection<E> {
      * @return {@code true} if the specified object is equal to this set
      */
     @Pure
-    boolean equals(@GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
+    boolean equals(@MaybeModifiable @GuardSatisfied Set<E> this, @GuardSatisfied @Nullable Object o);
 
     /**
      * Returns the hash code value for this set.  The hash code of a set is
@@ -458,7 +460,7 @@ public interface Set<E> extends Collection<E> {
      * @see Set#equals(Object)
      */
     @Pure
-    int hashCode(@GuardSatisfied Set<E> this);
+    int hashCode(@MaybeModifiable @GuardSatisfied Set<E> this);
 
     /**
      * Creates a {@code Spliterator} over the elements in this set.
@@ -486,7 +488,7 @@ public interface Set<E> extends Collection<E> {
     @Override
     @SideEffectFree
     @DoesNotUnrefineReceiver("modifiability")
-    default Spliterator<E> spliterator(Set<E> this) {
+    default Spliterator<E> spliterator(@MaybeModifiable Set<E> this) {
         return Spliterators.spliterator(this, Spliterator.DISTINCT);
     }
 
@@ -787,7 +789,7 @@ default Spliterator<E> spliterator(Set<E> this) {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    static <E extends Object> @Unmodifiable @PolyNonEmpty Set<E> copyOf(@PolyNonEmpty Collection<? extends E> coll) {
+    static <E extends Object> @Unmodifiable @PolyNonEmpty Set<E> copyOf(@MaybeModifiable @PolyNonEmpty Collection<? extends E> coll) {
         if (coll instanceof ImmutableCollections.AbstractImmutableSet) {
             return (Set<E>)coll;
         } else if (coll.isEmpty()) { // Implicit nullcheck of coll
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index b16ac786a200..0b282df21623 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -4710,7 +4710,7 @@ public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness
      *
      * @since 1.8
      */
-    public static final class KeySetView<K,V> extends CollectionView<K,V,K>
+    public static final @Modifiable class KeySetView<K,V> extends CollectionView<K,V,K>
         implements Set<K>, java.io.Serializable {
         private static final long serialVersionUID = 7249069246763182397L;
         @SuppressWarnings("serial") // Conditionally serializable
@@ -5391,6 +5391,7 @@ static final class SearchKeysTask<K,V,U>
             super(p, b, i, f, t);
             this.searchFunction = searchFunction; this.result = result;
         }
+        @Pure
         public final U getRawResult() { return result.get(); }
         public final void compute() {
             final Function<? super K, ? extends U> searchFunction;
@@ -5435,6 +5436,7 @@ static final class SearchValuesTask<K,V,U>
             super(p, b, i, f, t);
             this.searchFunction = searchFunction; this.result = result;
         }
+        @Pure
         public final U getRawResult() { return result.get(); }
         public final void compute() {
             final Function<? super V, ? extends U> searchFunction;
@@ -5479,6 +5481,7 @@ static final class SearchEntriesTask<K,V,U>
             super(p, b, i, f, t);
             this.searchFunction = searchFunction; this.result = result;
         }
+        @Pure
         public final U getRawResult() { return result.get(); }
         public final void compute() {
             final Function<Entry<K,V>, ? extends U> searchFunction;
@@ -5523,6 +5526,7 @@ static final class SearchMappingsTask<K,V,U>
             super(p, b, i, f, t);
             this.searchFunction = searchFunction; this.result = result;
         }
+        @Pure
         public final U getRawResult() { return result.get(); }
         public final void compute() {
             final BiFunction<? super K, ? super V, ? extends U> searchFunction;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 7a7d1390f754..25da842e2671 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -36,6 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -98,7 +99,7 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @Pure
-    default V getOrDefault(ConcurrentMap<K,V> this,Object key, V defaultValue) {
+    default V getOrDefault(@MaybeModifiable ConcurrentMap<K,V> this,Object key, V defaultValue) {
         V v;
         return ((v = get(key)) != null) ? v : defaultValue;
     }
@@ -123,7 +124,7 @@ default V getOrDefault(ConcurrentMap<K,V> this,Object key, V defaultValue) {
      */
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    default void forEach(ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
+    default void forEach(@MaybeModifiable ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K,V> entry : entrySet()) {
             K k;
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index f7f00e4f177f..38e0ba4ba03a 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -1281,7 +1281,7 @@ public boolean add(@Growable LinkedTransferQueue<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) {
+    public boolean tryTransfer(@GuardSatisfied @Growable @CanShrink LinkedTransferQueue<E> this, E e) {
         return xfer(e, true, NOW, 0L) == null;
     }
 
@@ -1298,7 +1298,7 @@ public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQu
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
+    public void transfer(@GuardSatisfied @Growable @CanShrink LinkedTransferQueue<E> this, E e) throws InterruptedException {
         if (xfer(e, true, SYNC, 0L) != null) {
             Thread.interrupted(); // failure possible only due to interrupt
             throw new InterruptedException();
@@ -1321,7 +1321,8 @@ public void transfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean tryTransfer(@Growable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
+    public boolean tryTransfer(@GuardSatisfied @Growable @CanShrink LinkedTransferQueue<E> this, E e, long timeout, TimeUnit unit)
+        throws InterruptedException {
         if (xfer(e, true, TIMED, unit.toNanos(timeout)) == null)
             return true;
         if (!Thread.interrupted())
@@ -1350,7 +1351,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+    public E poll(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this) {
         return xfer(null, false, NOW, 0L);
     }
 
@@ -1360,7 +1361,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1376,7 +1377,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1624,14 +1625,14 @@ public boolean removeAll(@Shrinkable @CanShrink LinkedTransferQueue<E> this, Col
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
+    public boolean retainAll(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this, Collection<? extends @NonNull @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         return bulkRemove(e -> !c.contains(e));
     }
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) {
+    public void clear(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this) {
         bulkRemove(e -> true);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
index c9871800c108..4dc4f8077c49 100644
--- a/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/SynchronousQueue.java
@@ -875,7 +875,8 @@ public void put(@Growable SynchronousQueue<E> this, E e) throws InterruptedExcep
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
+    public boolean offer(@Growable SynchronousQueue<E> this, E e, long timeout, TimeUnit unit)
+        throws InterruptedException {
         if (e == null) throw new NullPointerException();
         if (transferer.transfer(e, true, unit.toNanos(timeout)) != null)
             return true;
@@ -909,7 +910,7 @@ public boolean offer(@Growable SynchronousQueue<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) throws InterruptedException {
+    public E take(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this) throws InterruptedException {
         E e = transferer.transfer(null, false, 0);
         if (e != null)
             return e;
@@ -928,7 +929,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public E poll(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = transferer.transfer(null, true, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;
@@ -944,7 +945,7 @@ public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, l
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+    public E poll(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this) {
         return transferer.transfer(null, true, 0);
     }
 
@@ -987,7 +988,7 @@ public int remainingCapacity() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this) {
+    public void clear(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this) {
     }
 
     /**
@@ -1050,7 +1051,7 @@ public boolean removeAll(@Shrinkable @CanShrink SynchronousQueue<E> this, Collec
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this, Collection<? extends @UnknownSignedness Object> c) {
         return false;
     }
 
@@ -1129,7 +1130,7 @@ public String toString() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
+    public int drainTo(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();
@@ -1147,7 +1148,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> th
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public int drainTo(@Shrinkable @GuardSatisfied @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
+    public int drainTo(@GuardSatisfied @Shrinkable @CanShrink SynchronousQueue<E> this, @Growable Collection<? super E> c, int maxElements) {
         Objects.requireNonNull(c);
         if (c == this)
             throw new IllegalArgumentException();

From fe7708a5830cefb670b12923c58c1fee2e6c8a60 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Wed, 27 May 2026 10:50:12 -0700
Subject: [PATCH 094/119] Put `@GuardSatisfied` first

---
 .../classes/java/util/concurrent/LinkedTransferQueue.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 38e0ba4ba03a..49a1bbbc0ffe 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -1332,7 +1332,7 @@ public boolean tryTransfer(@GuardSatisfied @Growable @CanShrink LinkedTransferQu
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
+    public E take(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this) throws InterruptedException {
         E e = xfer(null, false, SYNC, 0L);
         if (e != null)
             return e;
@@ -1342,7 +1342,7 @@ public E take(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this
 
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E poll(@Shrinkable @GuardSatisfied @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
+    public E poll(@GuardSatisfied @Shrinkable @CanShrink LinkedTransferQueue<E> this, long timeout, TimeUnit unit) throws InterruptedException {
         E e = xfer(null, false, TIMED, unit.toNanos(timeout));
         if (e != null || !Thread.interrupted())
             return e;

From 5cea093e396ea89baa50476890b92cb5847cde51 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Wed, 27 May 2026 14:39:16 -0700
Subject: [PATCH 095/119] Add safe directory

---
 .github/workflows/ci.yml  | 60 +++++++++++++++++++++++++++++++++++++++
 .github/workflows/defs.m4 |  9 ++++++
 2 files changed, 69 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f01059b7ea2c..8b96933014cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -153,6 +153,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -170,6 +173,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -187,6 +193,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -204,6 +213,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -221,6 +233,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -238,6 +253,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -255,6 +273,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -272,6 +293,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -289,6 +313,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -306,6 +333,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -323,6 +353,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -340,6 +373,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -357,6 +393,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -374,6 +413,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -391,6 +433,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -408,6 +453,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -426,6 +474,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -443,6 +494,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -460,6 +514,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -477,6 +534,9 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
diff --git a/.github/workflows/defs.m4 b/.github/workflows/defs.m4
index a1be27425770..c7dd3ff561df 100644
--- a/.github/workflows/defs.m4
+++ b/.github/workflows/defs.m4
@@ -23,6 +23,9 @@ define([cftests_job], [dnl
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -42,6 +45,9 @@ define([daikon_job], [dnl
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework
@@ -60,6 +66,9 @@ define([plume_lib_job], [dnl
         uses: actions/checkout@v6
         with:
           fetch-depth: 25
+      - name: git config
+        run: |
+          git config --global --add safe.directory /__w/jdk/jdk
       - name: clone git-scripts
         run: mkdir -p /tmp/$USER && git -C /tmp/$USER clone --depth=1 -q https://github.com/plume-lib/git-scripts.git
       - name: clone checker-framework

From 93a7c630da32d2de465d488eeffdb721c4149f46 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 27 May 2026 16:22:21 -0700
Subject: [PATCH 096/119] removed @PolyModifiable on list.iterators.

---
 src/java.base/share/classes/java/util/AbstractList.java     | 6 +++---
 .../share/classes/java/util/AbstractSequentialList.java     | 4 ++--
 src/java.base/share/classes/java/util/List.java             | 6 +++---
 .../classes/java/util/concurrent/ConcurrentHashMap.java     | 2 +-
 4 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index ddcb01da7045..bb92da589247 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -348,7 +348,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return new Itr();
     }
 
@@ -360,7 +360,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this) {
         return listIterator(0);
     }
 
@@ -387,7 +387,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHi
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 5dd09a930be1..750d0de9b2ce 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -268,7 +268,7 @@ public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequent
      * @return an iterator over the elements in this list (in proper sequence)
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty AbstractSequentialList<E> this) {
+    public @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty AbstractSequentialList<E> this) {
         return listIterator();
     }
 
@@ -282,5 +282,5 @@ public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequent
      *         sequence)
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public abstract @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable AbstractSequentialList<E> this, int index);
+    public abstract @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractSequentialList<E> this, int index);
 }
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 1d97736cfd09..e0faf2f7f340 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -218,7 +218,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns an array containing all of the elements in this list in proper
@@ -757,7 +757,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @return a list iterator over the elements in this list (in proper
      *         sequence)
      */
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this);
+    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this);
 
     /**
      * Returns a list iterator over the elements in this list (in proper
@@ -774,7 +774,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      * @throws IndexOutOfBoundsException if the index is out of range
      *         ({@code index < 0 || index > size()})
      */
-    @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
+    @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty List<E> this, @IndexOrHigh({"this"}) int index);
 
     // View
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 0b282df21623..5e565d20aa2e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -4710,7 +4710,7 @@ public final boolean retainAll(Collection<? extends @NonNull @UnknownSignedness
      *
      * @since 1.8
      */
-    public static final @Modifiable class KeySetView<K,V> extends CollectionView<K,V,K>
+    public static final class KeySetView<K,V> extends CollectionView<K,V,K>
         implements Set<K>, java.io.Serializable {
         private static final long serialVersionUID = 7249069246763182397L;
         @SuppressWarnings("serial") // Conditionally serializable

From a4c6fc623f6ab40808f864354dba0fb3e6e68159 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 27 May 2026 17:20:08 -0700
Subject: [PATCH 097/119] fixed toArray annotation in AbstractCollection.java

---
 src/java.base/share/classes/java/util/AbstractCollection.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 68cc5df6677b..0c7375469f9f 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -214,7 +214,7 @@ public boolean contains(@MaybeModifiable @GuardSatisfied AbstractCollection<E> t
      * @throws NullPointerException {@inheritDoc}
      */
     @SuppressWarnings("unchecked")
-    public <T> @Nullable T [] toArray(@MaybeModifiable @PolyNull T [] a) {
+    public <T> @Nullable T [] toArray(@MaybeModifiable AbstractCollection<E> this, @PolyNull T [] a) {
         // Estimate size of array; be prepared to see more or fewer elements
         int size = size();
         T[] r = a.length >= size ? a :

From 338c6a39fc9ee5c299e28dbde20d93a3c99a4a2a Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Fri, 29 May 2026 09:31:29 -0700
Subject: [PATCH 098/119] Rename qualifiers

---
 checker-qual.jar                              | Bin 291748 -> 291812 bytes
 .../classes/java/util/AbstractCollection.java |  10 ++--
 .../share/classes/java/util/AbstractList.java |   4 +-
 .../share/classes/java/util/AbstractMap.java  |   8 +--
 .../java/util/AbstractSequentialList.java     |  10 ++--
 .../share/classes/java/util/AbstractSet.java  |   4 +-
 .../share/classes/java/util/ArrayDeque.java   |  10 ++--
 .../share/classes/java/util/ArrayList.java    |  10 ++--
 .../share/classes/java/util/Collection.java   |   4 +-
 .../share/classes/java/util/Collections.java  |  52 +++++++++---------
 .../share/classes/java/util/EnumMap.java      |   8 +--
 .../share/classes/java/util/EnumSet.java      |  30 +++++-----
 .../share/classes/java/util/HashMap.java      |   8 +--
 .../share/classes/java/util/HashSet.java      |  14 ++---
 .../share/classes/java/util/Hashtable.java    |   8 +--
 .../classes/java/util/IdentityHashMap.java    |   8 +--
 .../classes/java/util/LinkedHashMap.java      |  14 ++---
 .../classes/java/util/LinkedHashSet.java      |  10 ++--
 .../share/classes/java/util/LinkedList.java   |   8 +--
 .../share/classes/java/util/List.java         |   6 +-
 .../share/classes/java/util/Map.java          |   8 +--
 .../share/classes/java/util/NavigableMap.java |   6 +-
 .../classes/java/util/PriorityQueue.java      |  16 +++---
 .../share/classes/java/util/Properties.java   |   8 +--
 .../java/util/ReverseOrderSortedMapView.java  |  10 ++--
 .../java/util/SequencedCollection.java        |   6 +-
 .../share/classes/java/util/SortedMap.java    |   8 +--
 .../share/classes/java/util/Stack.java        |   4 +-
 .../share/classes/java/util/TreeMap.java      |  22 ++++----
 .../share/classes/java/util/TreeSet.java      |  14 ++---
 .../share/classes/java/util/Vector.java       |  12 ++--
 .../share/classes/java/util/WeakHashMap.java  |   8 +--
 .../util/concurrent/ArrayBlockingQueue.java   |   8 +--
 .../util/concurrent/ConcurrentHashMap.java    |  10 ++--
 .../concurrent/ConcurrentLinkedDeque.java     |   6 +-
 .../concurrent/ConcurrentLinkedQueue.java     |   6 +-
 .../concurrent/ConcurrentNavigableMap.java    |   8 +--
 .../concurrent/ConcurrentSkipListMap.java     |  22 ++++----
 .../concurrent/ConcurrentSkipListSet.java     |  14 ++---
 .../java/util/concurrent/DelayQueue.java      |   6 +-
 .../util/concurrent/LinkedBlockingDeque.java  |   8 +--
 .../util/concurrent/LinkedBlockingQueue.java  |   8 +--
 .../util/concurrent/LinkedTransferQueue.java  |   6 +-
 .../concurrent/PriorityBlockingQueue.java     |  10 ++--
 .../checker/modifiability/qual/Growable.java  |   2 +-
 ...lyMod.java => IteratorPolyShrinkable.java} |   8 +--
 .../modifiability/qual/MaybeGrowable.java     |   5 +-
 ....java => MaybeIteratorPolyShrinkable.java} |   6 +-
 .../modifiability/qual/MaybeReplaceable.java  |   6 +-
 .../modifiability/qual/MaybeShrinkable.java   |   7 ++-
 .../modifiability/qual/Modifiable.java        |   4 +-
 .../modifiability/qual/PolyModifiable.java    |  10 ++--
 .../modifiability/qual/Replaceable.java       |   2 +-
 .../modifiability/qual/Shrinkable.java        |   4 +-
 .../modifiability/qual/UnmodifiableParam.java |  12 ++--
 .../modifiability/qual/Unshrinkable.java      |   4 +-
 .../dataflow/qual/SideEffectFree.java         |   4 +-
 57 files changed, 268 insertions(+), 266 deletions(-)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{IteratorPolyMod.java => IteratorPolyShrinkable.java} (71%)
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{MaybeIteratorPolyMod.java => MaybeIteratorPolyShrinkable.java} (83%)

diff --git a/checker-qual.jar b/checker-qual.jar
index 92ec2c9758ac4af63571c4096a6db5ad6ebef102..fbd435a517ff42057757a020a1a2d8e808d055b8 100644
GIT binary patch
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diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 0c7375469f9f..f90a0ef7df37 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -310,7 +310,7 @@ public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
@@ -407,7 +407,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Coll
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -444,7 +444,7 @@ public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -475,7 +475,7 @@ public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+    public void clear(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index bb92da589247..fb178cdb4dd8 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -663,7 +663,7 @@ public int hashCode(@MaybeModifiable @GuardSatisfied AbstractList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    protected void removeRange(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index 8751957d9967..e09aaaeb7485 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -395,7 +395,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -469,7 +469,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -527,7 +527,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    public abstract @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
+    public abstract @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 750d0de9b2ce..9eb9c7645f84 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -136,7 +136,7 @@ public E get(@MaybeModifiable @GuardSatisfied AbstractSequentialList<E> this, in
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@IteratorPolyMod @Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public E set(@IteratorPolyShrinkable @Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             ListIterator<E> e = listIterator(index);
             E oldVal = e.next();
@@ -170,7 +170,7 @@ public E set(@IteratorPolyMod @Replaceable @GuardSatisfied AbstractSequentialLis
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public void add(@IteratorPolyShrinkable @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             listIterator(index).add(element);
         } catch (NoSuchElementException exc) {
@@ -197,7 +197,7 @@ public void add(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialLis
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
+    public E remove(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
         try {
             ListIterator<E> e = listIterator(index);
             E outCast = e.next();
@@ -242,7 +242,7 @@ public E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Abstract
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
+    public boolean addAll(@IteratorPolyShrinkable @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
         try {
             boolean modified = false;
             ListIterator<E> e1 = listIterator(index);
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index fa3f8e9e2d48..c28ed04cc7b3 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -180,7 +180,7 @@ public int hashCode(@MaybeModifiable @GuardSatisfied AbstractSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index df6f3a597294..444c9c041a1f 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -203,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable @IteratorPolyMod ArrayDeque() {
+    public @Modifiable @IteratorPolyShrinkable ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -213,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable @IteratorPolyMod ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPolyShrinkable ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -230,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1245,7 +1245,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPolyShrinkable ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index dd0a291b1960..415fa480cc2d 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -183,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -198,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod ArrayList() {
+    public @Modifiable @IteratorPolyShrinkable ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -211,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 0e80771451f7..29850ff68fb0 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -626,7 +626,7 @@ default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> ge
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+    default boolean removeIf(@IteratorPolyShrinkable @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 1426e5d2cd0b..93befcbef31d 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -178,7 +178,7 @@ private Collections() {
      */
     @SuppressWarnings("unchecked")
     // @SideEffectsOnly("#1")
-    public static <T extends Comparable<? super T>> void sort(@IteratorPolyMod @Replaceable List<T> list) {
+    public static <T extends Comparable<? super T>> void sort(@IteratorPolyShrinkable @Replaceable List<T> list) {
         list.sort(null);
     }
 
@@ -213,7 +213,7 @@ public static <T extends Comparable<? super T>> void sort(@IteratorPolyMod @Repl
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
     // @SideEffectsOnly("#1")
-    public static <T> void sort(@IteratorPolyMod @Replaceable List<T> list, @Nullable Comparator<? super T> c) {
+    public static <T> void sort(@IteratorPolyShrinkable @Replaceable List<T> list, @Nullable Comparator<? super T> c) {
         list.sort(c);
     }
 
@@ -420,7 +420,7 @@ else if (cmp > 0)
      * @see    List#reversed List.reversed
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void reverse(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
+    public static void reverse(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list) {
         int size = list.size();
         if (size < REVERSE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=0, mid=size>>1, j=size-1; i<mid; i++, j--)
@@ -467,7 +467,7 @@ public static void reverse(@IteratorPolyMod @Replaceable @GuardSatisfied List<?>
      * @throws UnsupportedOperationException if the specified list or
      *         its list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
+    public static void shuffle(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list) {
         Random rnd = r;
         if (rnd == null)
             r = rnd = new Random(); // harmless race.
@@ -490,7 +490,7 @@ public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?>
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@IteratorPolyMod @Replaceable List<?> list, Random rnd) {
+    public static void shuffle(@IteratorPolyShrinkable @Replaceable List<?> list, Random rnd) {
         shuffle(list, (RandomGenerator) rnd);
     }
 
@@ -519,7 +519,7 @@ public static void shuffle(@IteratorPolyMod @Replaceable List<?> list, Random rn
      * @since 21
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
+    public static void shuffle(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
         int size = list.size();
         if (size < SHUFFLE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=size; i>1; i--)
@@ -586,7 +586,7 @@ private static void swap(Object[] arr, int i, int j) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<? super T> list, T obj) {
+    public static <T> void fill(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<? super T> list, T obj) {
         int size = list.size();
 
         if (size < FILL_THRESHOLD || list instanceof RandomAccess) {
@@ -619,7 +619,7 @@ public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<?
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, @MaybeModifiable List<? extends T> src) {
+    public static <T> void copy(@IteratorPolyShrinkable @Replaceable List<? super T> dest, @MaybeModifiable List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -847,7 +847,7 @@ public static <T> T max(@MaybeModifiable Collection<? extends T> coll, @Nullable
      *         its list-iterator does not support the {@code set} operation.
      * @since 1.4
      */
-    public static void rotate(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, int distance) {
+    public static void rotate(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list, int distance) {
         if (list instanceof RandomAccess || list.size() < ROTATE_THRESHOLD)
             rotate1(list, distance);
         else
@@ -913,7 +913,7 @@ private static void rotate2(List<?> list, int distance) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list, @Nullable T oldVal, T newVal) {
+    public static <T> boolean replaceAll(@IteratorPolyShrinkable @Replaceable List<T> list, @Nullable T oldVal, T newVal) {
         boolean result = false;
         int size = list.size();
         if (size < REPLACEALL_THRESHOLD || list instanceof RandomAccess) {
@@ -1094,7 +1094,7 @@ public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list,
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyMod @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @IteratorPolyShrinkable @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1340,7 +1340,7 @@ public E removeLast() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyMod @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@MaybeModifiable @PolyNonEmpty Set<? extends T> s) {
+    public static <T> @IteratorPolyShrinkable @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@MaybeModifiable @PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;
@@ -3226,7 +3226,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable SynchronizedMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (keySet==null)
                     keySet = new SynchronizedSet<>(m.keySet(), mutex);
@@ -3235,7 +3235,7 @@ public void clear() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (entrySet==null)
                     entrySet = new SynchronizedSet<>(m.entrySet(), mutex);
@@ -3243,7 +3243,7 @@ public void clear() {
             }
         }
 
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SynchronizedMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (values==null)
                     values = new SynchronizedCollection<>(m.values(), mutex);
@@ -3552,19 +3552,19 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
             }
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
             }
@@ -4394,8 +4394,8 @@ private String badValueMsg(Object value) {
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
         public void clear()                    { m.clear(); }
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable CheckedMap<K,V> this)                 { return m.keySet(); }
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable CheckedMap<K,V> this)          { return m.values(); }
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable CheckedMap<K,V> this)                 { return m.keySet(); }
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable CheckedMap<K,V> this)          { return m.values(); }
         @Pure
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         @Pure
@@ -4436,7 +4436,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
             return entrySet;
@@ -4966,17 +4966,17 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
 
@@ -6358,7 +6358,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable @IteratorPolyMod ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPolyShrinkable ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 93bcc3f6da52..41fe09f88534 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -426,7 +426,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      * @return a set view of the keys contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable EnumMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -474,7 +474,7 @@ public void clear(@Shrinkable KeySet this) {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable EnumMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -528,7 +528,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index 5dedb0466f8e..86107f467b4b 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -105,7 +105,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable @IteratorPolyMod EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPolyShrinkable EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -119,7 +119,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -140,7 +140,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -163,7 +163,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code s} is null
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -182,7 +182,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code c} is null
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -207,7 +207,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -228,7 +228,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified element
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -250,7 +250,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -274,7 +274,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -300,7 +300,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -327,7 +327,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -355,7 +355,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SafeVarargs
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -377,7 +377,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -399,7 +399,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod EnumSet<E> clone() {
+    public @Modifiable @IteratorPolyShrinkable EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index e2e56d733575..37dd28cd9805 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -963,7 +963,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1103,7 +1103,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1170,7 +1170,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 5d00823e2713..7e2cbc161601 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -126,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyMod HashSet() {
+    public @Modifiable @IteratorPolyShrinkable HashSet() {
         map = new HashMap<>();
     }
 
@@ -139,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -157,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyShrinkable HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -173,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -190,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable @IteratorPolyMod HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPolyShrinkable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -297,7 +297,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index cb7eaf080620..25d6cb5d38e6 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -710,7 +710,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -759,7 +759,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -850,7 +850,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 13ad5906714e..14de6a36e83a 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1049,7 +1049,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1169,7 +1169,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1287,7 +1287,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 2dff6128f0f6..e0a284667e46 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -661,7 +661,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -828,7 +828,7 @@ public SequencedSet<K> reversed() {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable LinkedHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -949,7 +949,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -1268,17 +1268,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedKeySet().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedValues().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedEntrySet().reversed();
         }
 
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index b0cd7488430c..0f2185dc6a6d 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -155,7 +155,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -171,7 +171,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -179,7 +179,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyMod LinkedHashSet() {
+    public @Modifiable @IteratorPolyShrinkable LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -193,7 +193,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index f8ee1602669f..66412ec7c80d 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -144,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable @IteratorPolyMod LinkedList() {
+    public @Modifiable @IteratorPolyShrinkable LinkedList() {
     }
 
     /**
@@ -155,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1149,7 +1149,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index e0faf2f7f340..06e3b0378b3a 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -34,7 +34,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -494,7 +494,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default void replaceAll(@IteratorPolyMod @Replaceable List<E> this, UnaryOperator<E> operator) {
+    default void replaceAll(@IteratorPolyShrinkable @Replaceable List<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final ListIterator<E> li = this.listIterator();
         while (li.hasNext()) {
@@ -564,7 +564,7 @@ default void replaceAll(@IteratorPolyMod @Replaceable List<E> this, UnaryOperato
     @SuppressWarnings({"unchecked", "rawtypes"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super E> c) {
+    default void sort(@IteratorPolyShrinkable @Replaceable List<E> this, Comparator<? super E> c) {
         Object[] a = this.toArray();
         Arrays.sort(a, (Comparator) c);
         ListIterator<E> i = this.listIterator();
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 4ea0da0de19a..03a19c816ba2 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -422,7 +422,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -441,7 +441,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 51d379b92838..256e88b9449a 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable NavigableMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -330,7 +330,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable NavigableMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index b5c3777f9d18..031a0c01a81f 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -153,7 +153,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue() {
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -166,7 +166,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -179,7 +179,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -194,7 +194,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -220,7 +220,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -251,7 +251,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -269,7 +269,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 0d4b048197c7..7f51a735af03 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -27,7 +27,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1412,19 +1412,19 @@ public synchronized String toString() {
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrinkable Properties this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrinkable Properties this) {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<Object> values(@PolyShrinkable Properties this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<Object> values(@PolyShrinkable Properties this) {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
 
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index c7cf58a7393f..4dbf8608c87d 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -115,7 +115,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -130,7 +130,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -145,7 +145,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -438,7 +438,7 @@ public String toString() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
             return new AbstractSet<>() {
                 @SideEffectFree
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 2bfbc7336e52..8b28c96b2220 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -193,7 +193,7 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+    default E removeFirst(@IteratorPolyShrinkable @Shrinkable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
         it.remove();
@@ -217,7 +217,7 @@ default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
+    default E removeLast(@IteratorPolyShrinkable @Shrinkable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 5a7c0460749d..f313cc7706e1 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -286,7 +286,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -307,7 +307,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index ab8c4b91a1da..ff0d9802863a 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -67,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable @IteratorPolyMod Stack() {
+    public @Modifiable @IteratorPolyShrinkable Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 7a81625ea84a..7d445e2fcbe7 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1199,7 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1207,7 +1207,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1216,7 +1216,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1242,7 +1242,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1274,7 +1274,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
@@ -2109,19 +2109,19 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        public final @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public final @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
         @SideEffectFree
-        public final @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public final @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return descendingMap().navigableKeySet();
         }
 
@@ -2466,7 +2466,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
         }
@@ -2560,7 +2560,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
         }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 0b5a0ab42538..ebf216c5f226 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPolyMod TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyShrinkable TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -148,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPolyMod TreeSet() {
+    public @Modifiable @IteratorPolyShrinkable TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyMod TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrinkable TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -565,7 +565,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 40256d67eb7a..01287b8fdea8 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -167,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPolyShrinkable Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -184,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -193,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable @IteratorPolyMod Vector() {
+    public @Modifiable @IteratorPolyShrinkable Vector() {
         this(10);
     }
 
@@ -207,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -721,7 +721,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index 64ffd9d6764f..fc77fa2b261e 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -935,7 +935,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -998,7 +998,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1051,7 +1051,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index fbdcfa6bd5ff..534500453a2c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -277,7 +277,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -291,7 +291,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -316,7 +316,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 5e565d20aa2e..42b7f2c02b0b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1286,7 +1286,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySetView<K,V>(this, null);
@@ -1311,7 +1311,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1335,7 +1335,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
@@ -2297,7 +2297,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @throws NullPointerException if the mappedValue is null
      */
     @SideEffectFree
-    public @IteratorPolyMod KeySetView<K,V> keySet(V mappedValue) {
+    public @IteratorPolyShrinkable KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
         return new KeySetView<K,V>(this, mappedValue);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index c69000e14e8c..6ee1f47d871b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -793,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -806,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 9079977b71da..514a55f20d7c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -265,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -278,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index 88089e87c66f..fca57cd36cb6 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -35,7 +35,7 @@
 
 package java.util.concurrent;
 
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -187,5 +187,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 424905b57961..62b7c4986535 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1654,14 +1654,14 @@ else if (doRemove(key, v) != null)
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1687,7 +1687,7 @@ else if (doRemove(key, v) != null)
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1721,7 +1721,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1736,7 +1736,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -3066,35 +3066,35 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
         /* ---------------- Submap Views -------------- */
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SubMap<K,V> this) {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
             return valuesView = new Values<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable SubMap<K,V> this) {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
             return entrySetView = new EntrySet<K,V>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyShrinkable NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 31fda8731889..d1435b728f1c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -132,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPolyMod ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 83abe7bfab5b..64359e6171a2 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -154,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyMod DelayQueue() {}
+    public @Modifiable @IteratorPolyShrinkable DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -164,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 1e040688930a..14cfadf8ca79 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -194,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingDeque() {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -204,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -219,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index b61bc66101a0..3c00956bfb7d 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingQueue() {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -275,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -291,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 49a1bbbc0ffe..53994bc0f49e 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1183,7 +1183,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable @IteratorPolyMod LinkedTransferQueue() {
+    public @Modifiable @IteratorPolyShrinkable LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1196,7 +1196,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index ebfd837c2ef8..9deb7bdeccde 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -210,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyMod PriorityBlockingQueue() {
+    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -223,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -239,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -263,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
index 4167df7d64b9..4ad15fd4f8be 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Growable.java
@@ -9,7 +9,7 @@
 
 /**
  * Calling grow operations such as {@code add}, {@code addAll}, etc. on this collection will not
- * result in throwing {@link UnsupportedOperationException}.
+ * throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about shrink or replace operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
similarity index 71%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
index 8ad422162e21..fb4fd4ea8528 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
@@ -8,10 +8,10 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} method preserves
+ * If a collection's type is {@code @IteratorPolyShrinkable}, then its {@code iterator()} method preserves
  * the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has type
  * {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
- * collection whose type is {@code @MaybeIteratorPolyMod}, its iterator is always
+ * collection whose type is {@code @MaybeIteratorPolyShrinkable}, its iterator is always
  * {@code @Unshrinkable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
@@ -19,5 +19,5 @@
 @Documented
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeIteratorPolyMod.class)
-public @interface IteratorPolyMod {}
+@SubtypeOf(MaybeIteratorPolyShrinkable.class)
+public @interface IteratorPolyShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
index 628c95dc13c7..c4914c496803 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeGrowable.java
@@ -9,8 +9,9 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Grow hierarchy. Represents unknown grow capability. The checker cannot
- * determine whether the collection supports grow operations such as {@code add}.
+ * The top qualifier in the Grow hierarchy. The collection may or may not support grow operations
+ * such as {@code add}. The checker conservatively issues an error wherever a grow operation is
+ * called on a {@code @MaybeGrowable} expression.
  *
  * <p>This is the default qualifier for unannotated types in the Grow hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java
similarity index 83%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java
index 30f794ba7973..e48346a6d48d 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java
@@ -9,11 +9,11 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * For the annotated collection, The return type of {@code iterator()} is {@code @Unshrinkable}.
+ * For the annotated collection, the return type of {@code iterator()} is {@code @Unshrinkable}.
  *
  * <p>This is the default qualifier for unannotated types.
  *
- * @see IteratorPolyMod
+ * @see IteratorPolyShrinkable
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
 @Documented
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface MaybeIteratorPolyMod {}
+public @interface MaybeIteratorPolyShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
index 641d51b83b56..1b1aa7978b95 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeReplaceable.java
@@ -9,9 +9,9 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Replace hierarchy. Represents unknown replace capability. The checker
- * cannot determine whether the collection supports replace operations such as {@code set} or {@code
- * replaceAll}.
+ * The top qualifier in the Replace hierarchy. The collection may or may not support replace
+ * operations such as {@code set} and {@code replaceAll}. The checker conservatively issues an error
+ * wherever a replace operation is called on a {@code @MaybeReplaceable} expression.
  *
  * <p>This is the default qualifier for unannotated types in the Replace hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
index b6889579408b..2175b8951d5f 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeShrinkable.java
@@ -9,9 +9,10 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the Shrink hierarchy. Represents unknown shrink capability. The checker
- * cannot determine whether the collection supports shrink operations such as {@code remove} or
- * {@code clear}.
+ * The top qualifier in the Shrink hierarchy. The collection may or may not support shrink
+ * operations such as {@code remove}, {@code, removeAll}, and {@code clear}. The checker
+ * conservatively issues an error wherever a shrink operation is called on a
+ * {@code @MaybeShrinkable} expression.
  *
  * <p>This is the default qualifier for unannotated types in the Shrink hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index f02de1c0592c..6ea06c0065be 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -8,8 +8,8 @@
 
 /**
  * Convenience alias usually meaning {@code @Growable @Shrinkable @Replaceable}. Calling a mutating
- * operation (growing, shrinking, or replacing) on this collection will not result in throwing
- * {@link UnsupportedOperationException}.
+ * operation (growing, shrinking, or replacing) on this collection will not throw {@link
+ * UnsupportedOperationException}.
  *
  * <p>As an exception, {@code @Modifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Modifiable Iterator} means
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 517762db7857..5176b1123f9d 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -7,8 +7,8 @@
  * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkable}. A polymorphic
  * qualifier for all three modifiability hierarchies.
  *
- * <p>You should write {@code @PolyModifiable} on methods that preserve or transfer modifiability,
- * such as {@code List.subList()}, {@code iterator()}, and {@code stream()}.
+ * <p>Write {@code @PolyModifiable} on methods that preserve or transfer modifiability, such as
+ * {@code List.subList()} and {@code stream()}.
  *
  * <p>For example:
  *
@@ -18,9 +18,9 @@
  * }
  * </code></pre>
  *
- * If the receiver type at a given call site is {@code @Unmodifiable}, the return type at that call
- * site {@code @Unmodifiable}. If the receiver type is {@code @Modifiable}, the return type is
- * {@code @Modifiable}. Likewise for growing and shrinking type qualifiers.
+ * At each call site, the return type is equal to the receiver type. If the receiver type is
+ * {@code @Growable}, the return type is {@code @Growable}. If the receiver type is
+ * {@code @Ungrowable}, the return type is {@code @Ungrowable}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
index 9759df8a08b4..58a79dbd5b7a 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Replaceable.java
@@ -9,7 +9,7 @@
 
 /**
  * Calling replace operations such as {@code set}, {@code replaceAll}, etc. on this collection will
- * not result in throwing {@link UnsupportedOperationException}.
+ * not throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about grow or shrink operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
index 10af526c558c..39bb42266427 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Shrinkable.java
@@ -8,8 +8,8 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * Calling shrink operations such as {@code remove}, {@code clear}, etc. on this collection will not
- * result in throwing {@link UnsupportedOperationException}.
+ * Calling shrink operations such as {@code remove}, {@code removeAll}, {@code clear}, etc. on this
+ * collection will not throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about grow or replace operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
index 3f3662d5a767..4c3390762cdc 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/UnmodifiableParam.java
@@ -7,13 +7,13 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. This is a
- * syntactic sugar for {@link MaybeModifiable}. It is intended to be used on parameters of methods
- * that are not designed to change the parameter. This annotation is only allowed to be written
- * within method or constructor parameter types, or explicit receiver parameter types.
+ * Convenience alias that is syntactic sugar for {@code @}{@link MaybeModifiable}. It may only be
+ * written within a formal parameter type.
  *
- * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
+ * <p>You can write {@code @UnmodifiableParam} to indicate that a method does not change its
+ * parameter. From the method's point of view, the parameter is unmodifiable. This is reference
+ * unmodifiability, because another alias can change the value, unlike {@code @}{@link Unmodifiable}
+ * which means object immutability: no alias can change the value.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
index c52ce9679d8a..eb32a3949516 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unshrinkable.java
@@ -8,8 +8,8 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * Calling shrink operations such as {@code remove}, {@code clear}, etc. on this collection will
- * throw {@link UnsupportedOperationException}.
+ * Calling shrink operations such as {@code remove}, {@code removeAll}, {@code clear}, etc. on this
+ * collection will throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about grow or replace operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectFree.java b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectFree.java
index da33d80443e7..db55f24f792b 100644
--- a/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectFree.java
+++ b/src/java.base/share/classes/org/checkerframework/dataflow/qual/SideEffectFree.java
@@ -12,8 +12,8 @@
  *
  * <p>Only the visible side effects are important. The method is allowed to cache the answer to a
  * computationally expensive query, for instance. It is also allowed to modify newly-created
- * objects, and a constructor is side-effect-free if it does not modify any objects that existed
- * before it was called.
+ * objects. A constructor is side-effect-free if it does not modify any objects that existed before
+ * it was called in ways that are externally visible.
  *
  * <p>This annotation is important to pluggable type-checking because if some fact about an object
  * is known before a call to such a method, then the fact is still known afterwards, even if the

From 31b62bd5c5f9f5f23400e8d5b62034ce65cb9a8c Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Fri, 29 May 2026 12:17:32 -0700
Subject: [PATCH 099/119] Push @IteratorPolyMod upward

---
 .../classes/java/util/AbstractCollection.java  |  2 +-
 .../share/classes/java/util/AbstractList.java  | 10 +++++-----
 .../share/classes/java/util/Collection.java    | 10 +++++-----
 .../share/classes/java/util/List.java          | 18 +++++++++---------
 src/java.base/share/classes/java/util/Set.java |  3 ++-
 5 files changed, 22 insertions(+), 21 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 0c7375469f9f..8e87fdef2d3b 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -287,7 +287,7 @@ private static <T> T[] finishToArray(T[] r, Iterator<?> it) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
+    public boolean add(@IteratorPolyMod @Growable @GuardSatisfied AbstractCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index bb92da589247..aab4e8b60b13 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -142,7 +142,7 @@ protected AbstractList() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
+    public boolean add(@IteratorPolyMod @Growable @GuardSatisfied AbstractList<E> this, E e) {
         add(size(), e);
         return true;
     }
@@ -171,7 +171,7 @@ public boolean add(@Growable @GuardSatisfied AbstractList<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
+    public E set(@IteratorPolyMod @Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -191,7 +191,7 @@ public E set(@Replaceable @GuardSatisfied AbstractList<E> this, @IndexFor({"this
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
+    public void add(@IteratorPolyMod @Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, E element) {
         throw new UnsupportedOperationException();
     }
 
@@ -207,7 +207,7 @@ public void add(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
+    public E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexFor({"this"}) int index) {
         throw new UnsupportedOperationException();
     }
 
@@ -315,7 +315,7 @@ public void clear(@Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
+    public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractList<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c) {
         rangeCheckForAdd(index);
         boolean modified = false;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 0e80771451f7..7e7d6eb1eb4c 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -499,7 +499,7 @@ default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> ge
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean add(@Growable @GuardSatisfied Collection<E> this, E e);
+    boolean add(@IteratorPolyMod @Growable @GuardSatisfied Collection<E> this, E e);
     /**
      * Removes a single instance of the specified element from this
      * collection, if it is present (optional operation).  More formally,
@@ -522,7 +522,7 @@ default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> ge
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean remove(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, @UnknownSignedness Object o);
+    boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Collection<E> this, @UnknownSignedness Object o);
 
     // Bulk Operations
 
@@ -601,7 +601,7 @@ default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> ge
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
     /**
      * Removes all of the elements of this collection that satisfy the given
      * predicate.  Errors or runtime exceptions thrown during iteration or by
@@ -663,7 +663,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Collection<E> this, Collection<? extends @UnknownSignedness Object> c);
     /**
      * Removes all of the elements from this collection (optional operation).
      * The collection will be empty after this method returns.
@@ -673,7 +673,7 @@ default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> t
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void clear(@Shrinkable @GuardSatisfied @CanShrink Collection<E> this);
+    void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink Collection<E> this);
 
     // Comparison and hashing
 
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index e0faf2f7f340..372221ac529b 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -310,7 +310,7 @@ public interface List<E> extends SequencedCollection<E> {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean add(@Growable @GuardSatisfied List<E> this, E e);
+    boolean add(@IteratorPolyMod @Growable @GuardSatisfied List<E> this, E e);
 
     /**
      * Removes the first occurrence of the specified element from this list,
@@ -335,7 +335,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean remove(@Shrinkable @GuardSatisfied @CanShrink List<E> this, @UnknownSignedness Object o);
+    boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink List<E> this, @UnknownSignedness Object o);
 
     // Bulk Modification Operations
 
@@ -416,7 +416,7 @@ public interface List<E> extends SequencedCollection<E> {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @EnsuresNonEmptyIf(result = true, expression = "this")
-    boolean addAll(@Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
+    boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, Collection<? extends E> c);
 
     /**
      * Removes from this list all of its elements that are contained in the
@@ -438,7 +438,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean removeAll(@Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Retains only the elements in this list that are contained in the
@@ -462,7 +462,7 @@ public interface List<E> extends SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean retainAll(@Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink List<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Replaces each element of this list with the result of applying the
@@ -583,7 +583,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void clear(@Shrinkable @GuardSatisfied @CanShrink List<E> this);
+    void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink List<E> this);
 
 
     // Comparison and hashing
@@ -660,7 +660,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    E set(@Replaceable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
+    E set(@IteratorPolyMod @Replaceable @GuardSatisfied List<E> this, @IndexFor({"this"}) int index, E element);
 
     /**
      * Inserts the specified element at the specified position in this list
@@ -685,7 +685,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void add(@Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
+    void add(@IteratorPolyMod @Growable @GuardSatisfied List<E> this, @IndexOrHigh({"this"}) int index, E element);
     /**
      * Removes the element at the specified position in this list (optional
      * operation).  Shifts any subsequent elements to the left (subtracts one
@@ -702,7 +702,7 @@ default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super
     @ReleasesNoLocks
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    E remove(@Shrinkable @GuardSatisfied @CanShrink List<E> this, @IndexFor({"this"}) int index);
+    E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink List<E> this, @IndexFor({"this"}) int index);
 
 
     // Search Operations
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 2e6095c586f7..b13a4a7ed234 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -415,7 +416,7 @@ public interface Set<E> extends Collection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean removeAll(@Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
+    boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied Set<E> this, Collection<? extends @UnknownSignedness Object> c);
 
     /**
      * Removes all of the elements from this set (optional operation).

From 25213e03e0f602458677eada40e43b5128f6fda8 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Fri, 29 May 2026 14:33:05 -0700
Subject: [PATCH 100/119] rename iteratorPolyShrinkable back to IteratorPolyMod

---
 .../classes/java/util/AbstractCollection.java | 10 ++--
 .../share/classes/java/util/AbstractList.java |  4 +-
 .../share/classes/java/util/AbstractMap.java  |  8 +--
 .../java/util/AbstractSequentialList.java     | 10 ++--
 .../share/classes/java/util/AbstractSet.java  |  4 +-
 .../share/classes/java/util/ArrayDeque.java   | 10 ++--
 .../share/classes/java/util/ArrayList.java    | 10 ++--
 .../share/classes/java/util/Collection.java   |  4 +-
 .../share/classes/java/util/Collections.java  | 52 +++++++++----------
 .../share/classes/java/util/EnumMap.java      |  8 +--
 .../share/classes/java/util/EnumSet.java      | 30 +++++------
 .../share/classes/java/util/HashMap.java      |  8 +--
 .../share/classes/java/util/HashSet.java      | 14 ++---
 .../share/classes/java/util/Hashtable.java    |  8 +--
 .../classes/java/util/IdentityHashMap.java    |  8 +--
 .../classes/java/util/LinkedHashMap.java      | 14 ++---
 .../classes/java/util/LinkedHashSet.java      | 10 ++--
 .../share/classes/java/util/LinkedList.java   |  8 +--
 .../share/classes/java/util/List.java         |  6 +--
 .../share/classes/java/util/Map.java          |  8 +--
 .../share/classes/java/util/NavigableMap.java |  6 +--
 .../classes/java/util/PriorityQueue.java      | 16 +++---
 .../share/classes/java/util/Properties.java   |  8 +--
 .../java/util/ReverseOrderSortedMapView.java  | 10 ++--
 .../java/util/SequencedCollection.java        |  6 +--
 .../share/classes/java/util/SortedMap.java    |  8 +--
 .../share/classes/java/util/Stack.java        |  4 +-
 .../share/classes/java/util/TreeMap.java      | 22 ++++----
 .../share/classes/java/util/TreeSet.java      | 14 ++---
 .../share/classes/java/util/Vector.java       | 12 ++---
 .../share/classes/java/util/WeakHashMap.java  |  8 +--
 .../util/concurrent/ArrayBlockingQueue.java   |  8 +--
 .../util/concurrent/ConcurrentHashMap.java    | 10 ++--
 .../concurrent/ConcurrentLinkedDeque.java     |  6 +--
 .../concurrent/ConcurrentLinkedQueue.java     |  6 +--
 .../concurrent/ConcurrentNavigableMap.java    |  8 +--
 .../concurrent/ConcurrentSkipListMap.java     | 22 ++++----
 .../concurrent/ConcurrentSkipListSet.java     | 14 ++---
 .../java/util/concurrent/DelayQueue.java      |  6 +--
 .../util/concurrent/LinkedBlockingDeque.java  |  8 +--
 .../util/concurrent/LinkedBlockingQueue.java  |  8 +--
 .../util/concurrent/LinkedTransferQueue.java  |  6 +--
 .../concurrent/PriorityBlockingQueue.java     | 10 ++--
 43 files changed, 230 insertions(+), 230 deletions(-)

diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index f90a0ef7df37..0c7375469f9f 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -310,7 +310,7 @@ public boolean add(@Growable @GuardSatisfied AbstractCollection<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean remove(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
+    public boolean remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, @GuardSatisfied @UnknownSignedness Object o) {
         Iterator<E> it = iterator();
         if (o==null) {
             while (it.hasNext()) {
@@ -407,7 +407,7 @@ public boolean addAll(@Growable @GuardSatisfied AbstractCollection<E> this, Coll
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<?> it = iterator();
@@ -444,7 +444,7 @@ public boolean removeAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @Ca
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean retainAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean retainAll(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
         Iterator<E> it = iterator();
@@ -475,7 +475,7 @@ public boolean retainAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @Ca
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void clear(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
+    public void clear(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractCollection<E> this) {
         Iterator<E> it = iterator();
         while (it.hasNext()) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index fb178cdb4dd8..bb92da589247 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -663,7 +663,7 @@ public int hashCode(@MaybeModifiable @GuardSatisfied AbstractList<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    protected void removeRange(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
+    protected void removeRange(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractList<E> this, @IndexOrHigh({"this"}) int fromIndex, @IndexOrHigh({"this"}) int toIndex) {
         ListIterator<E> it = listIterator(fromIndex);
         for (int i=0, n=toIndex-fromIndex; i<n; i++) {
             it.next();
diff --git a/src/java.base/share/classes/java/util/AbstractMap.java b/src/java.base/share/classes/java/util/AbstractMap.java
index e09aaaeb7485..8751957d9967 100644
--- a/src/java.base/share/classes/java/util/AbstractMap.java
+++ b/src/java.base/share/classes/java/util/AbstractMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -395,7 +395,7 @@ public void clear(@Shrinkable @GuardSatisfied AbstractMap<K, V> this) {
      * method will not all return the same set.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new AbstractSet<K>() {
@@ -469,7 +469,7 @@ public boolean contains(@UnknownSignedness Object k) {
      * method will not all return the same collection.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied AbstractMap<K, V> this) {
         Collection<V> vals = values;
         if (vals == null) {
             vals = new AbstractCollection<V>() {
@@ -527,7 +527,7 @@ public boolean contains(@UnknownSignedness Object v) {
     }
 
     @SideEffectFree
-    public abstract @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
+    public abstract @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied AbstractMap<K, V> this);
 
 
     // Comparison and hashing
diff --git a/src/java.base/share/classes/java/util/AbstractSequentialList.java b/src/java.base/share/classes/java/util/AbstractSequentialList.java
index 9eb9c7645f84..750d0de9b2ce 100644
--- a/src/java.base/share/classes/java/util/AbstractSequentialList.java
+++ b/src/java.base/share/classes/java/util/AbstractSequentialList.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -136,7 +136,7 @@ public E get(@MaybeModifiable @GuardSatisfied AbstractSequentialList<E> this, in
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E set(@IteratorPolyShrinkable @Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public E set(@IteratorPolyMod @Replaceable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             ListIterator<E> e = listIterator(index);
             E oldVal = e.next();
@@ -170,7 +170,7 @@ public E set(@IteratorPolyShrinkable @Replaceable @GuardSatisfied AbstractSequen
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void add(@IteratorPolyShrinkable @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
+    public void add(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, E element) {
         try {
             listIterator(index).add(element);
         } catch (NoSuchElementException exc) {
@@ -197,7 +197,7 @@ public void add(@IteratorPolyShrinkable @Growable @GuardSatisfied AbstractSequen
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public E remove(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
+    public E remove(@IteratorPolyMod @Shrinkable @GuardSatisfied @CanShrink AbstractSequentialList<E> this, int index) {
         try {
             ListIterator<E> e = listIterator(index);
             E outCast = e.next();
@@ -242,7 +242,7 @@ public E remove(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied @CanShrink A
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean addAll(@IteratorPolyShrinkable @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
+    public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractSequentialList<E> this, int index, Collection<? extends E> c) {
         try {
             boolean modified = false;
             ListIterator<E> e1 = listIterator(index);
diff --git a/src/java.base/share/classes/java/util/AbstractSet.java b/src/java.base/share/classes/java/util/AbstractSet.java
index c28ed04cc7b3..fa3f8e9e2d48 100644
--- a/src/java.base/share/classes/java/util/AbstractSet.java
+++ b/src/java.base/share/classes/java/util/AbstractSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -180,7 +180,7 @@ public int hashCode(@MaybeModifiable @GuardSatisfied AbstractSet<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean removeAll(@IteratorPolyShrinkable @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
+    public boolean removeAll(@IteratorPolyMod @Shrinkable @GuardSatisfied AbstractSet<E> this, Collection<? extends @UnknownSignedness Object> c) {
         Objects.requireNonNull(c);
         boolean modified = false;
 
diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index 444c9c041a1f..df6f3a597294 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -203,7 +203,7 @@ private int newCapacity(int needed, int jump) {
      * Constructs an empty array deque with an initial capacity
      * sufficient to hold 16 elements.
      */
-    public @Modifiable @IteratorPolyShrinkable ArrayDeque() {
+    public @Modifiable @IteratorPolyMod ArrayDeque() {
         elements = new Object[16 + 1];
     }
 
@@ -213,7 +213,7 @@ private int newCapacity(int needed, int jump) {
      *
      * @param numElements lower bound on initial capacity of the deque
      */
-    public @Modifiable @IteratorPolyShrinkable ArrayDeque(@NonNegative int numElements) {
+    public @Modifiable @IteratorPolyMod ArrayDeque(@NonNegative int numElements) {
         elements =
             new Object[(numElements < 1) ? 1 :
                        (numElements == Integer.MAX_VALUE) ? Integer.MAX_VALUE :
@@ -230,7 +230,7 @@ private int newCapacity(int needed, int jump) {
      * @param c the collection whose elements are to be placed into the deque
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayDeque(@PolyNonEmpty Collection<? extends E> c) {
         this(c.size());
         copyElements(c);
     }
@@ -1245,7 +1245,7 @@ private <T> T[] toArray(Class<T[]> klazz) {
      * @return a copy of this deque
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
+    public @Modifiable @IteratorPolyMod ArrayDeque<E> clone(@GuardSatisfied ArrayDeque<E> this) {
         try {
             @SuppressWarnings("unchecked")
             ArrayDeque<E> result = (ArrayDeque<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 415fa480cc2d..dd0a291b1960 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -183,7 +183,7 @@ public class ArrayList<E> extends AbstractList<E>
      *         is negative
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable ArrayList(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod ArrayList(@NonNegative int initialCapacity) {
         if (initialCapacity > 0) {
             this.elementData = new Object[initialCapacity];
         } else if (initialCapacity == 0) {
@@ -198,7 +198,7 @@ public class ArrayList<E> extends AbstractList<E>
      * Constructs an empty list with an initial capacity of ten.
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable ArrayList() {
+    public @Modifiable @IteratorPolyMod ArrayList() {
         this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA;
     }
 
@@ -211,7 +211,7 @@ public class ArrayList<E> extends AbstractList<E>
      * @throws NullPointerException if the specified collection is null
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty ArrayList(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         if ((size = a.length) != 0) {
             if (c.getClass() == ArrayList.class) {
@@ -385,7 +385,7 @@ int lastIndexOfRange(@GuardSatisfied @Nullable @UnknownSignedness Object o, int
      * @return a clone of this {@code ArrayList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied ArrayList<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied ArrayList<E> this) {
         try {
             ArrayList<?> v = (ArrayList<?>) super.clone();
             v.elementData = Arrays.copyOf(elementData, size);
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index 29850ff68fb0..0e80771451f7 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -626,7 +626,7 @@ default <T> T[] toArray(@MaybeModifiable Collection<E> this, IntFunction<T[]> ge
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default boolean removeIf(@IteratorPolyShrinkable @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
+    default boolean removeIf(@IteratorPolyMod @Shrinkable @CanShrink Collection<E> this, Predicate<? super E> filter) {
         Objects.requireNonNull(filter);
         boolean removed = false;
         final Iterator<E> each = iterator();
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 93befcbef31d..1426e5d2cd0b 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -30,7 +30,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -178,7 +178,7 @@ private Collections() {
      */
     @SuppressWarnings("unchecked")
     // @SideEffectsOnly("#1")
-    public static <T extends Comparable<? super T>> void sort(@IteratorPolyShrinkable @Replaceable List<T> list) {
+    public static <T extends Comparable<? super T>> void sort(@IteratorPolyMod @Replaceable List<T> list) {
         list.sort(null);
     }
 
@@ -213,7 +213,7 @@ public static <T extends Comparable<? super T>> void sort(@IteratorPolyShrinkabl
      */
     @SuppressWarnings({"unchecked", "rawtypes"})
     // @SideEffectsOnly("#1")
-    public static <T> void sort(@IteratorPolyShrinkable @Replaceable List<T> list, @Nullable Comparator<? super T> c) {
+    public static <T> void sort(@IteratorPolyMod @Replaceable List<T> list, @Nullable Comparator<? super T> c) {
         list.sort(c);
     }
 
@@ -420,7 +420,7 @@ else if (cmp > 0)
      * @see    List#reversed List.reversed
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void reverse(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list) {
+    public static void reverse(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
         int size = list.size();
         if (size < REVERSE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=0, mid=size>>1, j=size-1; i<mid; i++, j--)
@@ -467,7 +467,7 @@ public static void reverse(@IteratorPolyShrinkable @Replaceable @GuardSatisfied
      * @throws UnsupportedOperationException if the specified list or
      *         its list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list) {
+    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list) {
         Random rnd = r;
         if (rnd == null)
             r = rnd = new Random(); // harmless race.
@@ -490,7 +490,7 @@ public static void shuffle(@IteratorPolyShrinkable @Replaceable @GuardSatisfied
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static void shuffle(@IteratorPolyShrinkable @Replaceable List<?> list, Random rnd) {
+    public static void shuffle(@IteratorPolyMod @Replaceable List<?> list, Random rnd) {
         shuffle(list, (RandomGenerator) rnd);
     }
 
@@ -519,7 +519,7 @@ public static void shuffle(@IteratorPolyShrinkable @Replaceable List<?> list, Ra
      * @since 21
      */
     @SuppressWarnings({"rawtypes", "unchecked"})
-    public static void shuffle(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
+    public static void shuffle(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, RandomGenerator rnd) {
         int size = list.size();
         if (size < SHUFFLE_THRESHOLD || list instanceof RandomAccess) {
             for (int i=size; i>1; i--)
@@ -586,7 +586,7 @@ private static void swap(Object[] arr, int i, int j) {
      * @throws UnsupportedOperationException if the specified list or its
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void fill(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<? super T> list, T obj) {
+    public static <T> void fill(@IteratorPolyMod @Replaceable @GuardSatisfied List<? super T> list, T obj) {
         int size = list.size();
 
         if (size < FILL_THRESHOLD || list instanceof RandomAccess) {
@@ -619,7 +619,7 @@ public static <T> void fill(@IteratorPolyShrinkable @Replaceable @GuardSatisfied
      * @throws UnsupportedOperationException if the destination list's
      *         list-iterator does not support the {@code set} operation.
      */
-    public static <T> void copy(@IteratorPolyShrinkable @Replaceable List<? super T> dest, @MaybeModifiable List<? extends T> src) {
+    public static <T> void copy(@IteratorPolyMod @Replaceable List<? super T> dest, @MaybeModifiable List<? extends T> src) {
         int srcSize = src.size();
         if (srcSize > dest.size())
             throw new IndexOutOfBoundsException("Source does not fit in dest");
@@ -847,7 +847,7 @@ public static <T> T max(@MaybeModifiable Collection<? extends T> coll, @Nullable
      *         its list-iterator does not support the {@code set} operation.
      * @since 1.4
      */
-    public static void rotate(@IteratorPolyShrinkable @Replaceable @GuardSatisfied List<?> list, int distance) {
+    public static void rotate(@IteratorPolyMod @Replaceable @GuardSatisfied List<?> list, int distance) {
         if (list instanceof RandomAccess || list.size() < ROTATE_THRESHOLD)
             rotate1(list, distance);
         else
@@ -913,7 +913,7 @@ private static void rotate2(List<?> list, int distance) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public static <T> boolean replaceAll(@IteratorPolyShrinkable @Replaceable List<T> list, @Nullable T oldVal, T newVal) {
+    public static <T> boolean replaceAll(@IteratorPolyMod @Replaceable List<T> list, @Nullable T oldVal, T newVal) {
         boolean result = false;
         int size = list.size();
         if (size < REPLACEALL_THRESHOLD || list instanceof RandomAccess) {
@@ -1094,7 +1094,7 @@ public static <T> boolean replaceAll(@IteratorPolyShrinkable @Replaceable List<T
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyShrinkable @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyGrowShrink @PolyNonEmpty Collection<T> unmodifiableCollection(@MaybeModifiable @PolyGrowShrink @PolyNonEmpty Collection<? extends T> c) {
         if (c.getClass() == UnmodifiableCollection.class) {
             return (Collection<T>) c;
         }
@@ -1340,7 +1340,7 @@ public E removeLast() {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @IteratorPolyShrinkable @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@MaybeModifiable @PolyNonEmpty Set<? extends T> s) {
+    public static <T> @IteratorPolyMod @Unmodifiable @PolyNonEmpty Set<T> unmodifiableSet(@MaybeModifiable @PolyNonEmpty Set<? extends T> s) {
         // Not checking for subclasses because of heap pollution and information leakage.
         if (s.getClass() == UnmodifiableSet.class) {
             return (Set<T>) s;
@@ -3226,7 +3226,7 @@ public void clear() {
         private transient Set<Map.Entry<K,V>> entrySet;
         private transient Collection<V> values;
 
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (keySet==null)
                     keySet = new SynchronizedSet<>(m.keySet(), mutex);
@@ -3235,7 +3235,7 @@ public void clear() {
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (entrySet==null)
                     entrySet = new SynchronizedSet<>(m.entrySet(), mutex);
@@ -3243,7 +3243,7 @@ public void clear() {
             }
         }
 
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SynchronizedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SynchronizedMap<K,V> this) {
             synchronized (mutex) {
                 if (values==null)
                     values = new SynchronizedCollection<>(m.values(), mutex);
@@ -3552,19 +3552,19 @@ public NavigableMap<K, V> descendingMap() {
             }
         }
 
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.navigableKeySet(), mutex);
             }
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable SynchronizedNavigableMap<K,V> this) {
             synchronized (mutex) {
                 return new SynchronizedNavigableSet<>(nm.descendingKeySet(), mutex);
             }
@@ -4394,8 +4394,8 @@ private String badValueMsg(Object value) {
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
         public void clear()                    { m.clear(); }
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable CheckedMap<K,V> this)                 { return m.keySet(); }
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable CheckedMap<K,V> this)          { return m.values(); }
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable CheckedMap<K,V> this)                 { return m.keySet(); }
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable CheckedMap<K,V> this)          { return m.values(); }
         @Pure
         public boolean equals(Object o)        { return o == this || m.equals(o); }
         @Pure
@@ -4436,7 +4436,7 @@ public void putAll(Map<? extends K, ? extends V> t) {
         private transient Set<Map.Entry<K,V>> entrySet;
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable CheckedMap<K,V> this) {
             if (entrySet==null)
                 entrySet = new CheckedEntrySet<>(m.entrySet(), valueType);
             return entrySet;
@@ -4966,17 +4966,17 @@ public NavigableMap<K, V> descendingMap() {
             return checkedNavigableMap(nm.descendingMap(), keyType, valueType);
         }
 
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.navigableKeySet(), keyType);
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable CheckedNavigableMap<K,V> this) {
             return checkedNavigableSet(nm.descendingKeySet(), keyType);
         }
 
@@ -6358,7 +6358,7 @@ public T nextElement(/*@NonEmpty Enumeration<T> this*/) {
      * @see Enumeration
      * @see ArrayList
      */
-    public static <T> @Modifiable @IteratorPolyShrinkable ArrayList<T> list(Enumeration<T> e) {
+    public static <T> @Modifiable @IteratorPolyMod ArrayList<T> list(Enumeration<T> e) {
         ArrayList<T> l = new ArrayList<>();
         while (e.hasMoreElements())
             l.add(e.nextElement());
diff --git a/src/java.base/share/classes/java/util/EnumMap.java b/src/java.base/share/classes/java/util/EnumMap.java
index 41fe09f88534..93bcc3f6da52 100644
--- a/src/java.base/share/classes/java/util/EnumMap.java
+++ b/src/java.base/share/classes/java/util/EnumMap.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.initialization.qual.UnknownInitialization;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -426,7 +426,7 @@ public void clear(@Shrinkable EnumMap<K, V> this) {
      * @return a set view of the keys contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable EnumMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -474,7 +474,7 @@ public void clear(@Shrinkable KeySet this) {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable EnumMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -528,7 +528,7 @@ public void clear(@Shrinkable Values this) {
      * @return a set view of the mappings contained in this enum map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable EnumMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/EnumSet.java b/src/java.base/share/classes/java/util/EnumSet.java
index 86107f467b4b..5dedb0466f8e 100644
--- a/src/java.base/share/classes/java/util/EnumSet.java
+++ b/src/java.base/share/classes/java/util/EnumSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -105,7 +105,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     final transient Enum<?>[] universe;
 
-    @Modifiable @IteratorPolyShrinkable EnumSet(Class<E>elementType, Enum<?>[] universe) {
+    @Modifiable @IteratorPolyMod EnumSet(Class<E>elementType, Enum<?>[] universe) {
         this.elementType = elementType;
         this.universe    = universe;
     }
@@ -119,7 +119,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An empty enum set of the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> noneOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> noneOf(Class<E> elementType) {
         Enum<?>[] universe = getUniverse(elementType);
         if (universe == null)
             throw new ClassCastException(elementType + " not an enum");
@@ -140,7 +140,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return An enum set containing all the elements in the specified type.
      * @throws NullPointerException if {@code elementType} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> allOf(Class<E> elementType) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> allOf(Class<E> elementType) {
         EnumSet<E> result = noneOf(elementType);
         result.addAll();
         return result;
@@ -163,7 +163,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code s} is null
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> copyOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(EnumSet<E> s) {
         return s.clone();
     }
 
@@ -182,7 +182,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if {@code c} is null
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> copyOf(Collection<E> c) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> copyOf(Collection<E> c) {
         if (c instanceof EnumSet) {
             return ((EnumSet<E>)c).clone();
         } else {
@@ -207,7 +207,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return The complement of the specified set in this set
      * @throws NullPointerException if {@code s} is null
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> complementOf(EnumSet<E> s) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> complementOf(EnumSet<E> s) {
         EnumSet<E> result = copyOf(s);
         result.complement();
         return result;
@@ -228,7 +228,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified element
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e) {
         EnumSet<E> result = noneOf(e.getDeclaringClass());
         result.add(e);
         return result;
@@ -250,7 +250,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -274,7 +274,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -300,7 +300,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing the specified elements
      */
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3, E e4) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4) {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
         result.add(e1);
         result.add(e2);
@@ -327,7 +327,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @throws NullPointerException if any parameters are null
      * @return an enum set initially containing the specified elements
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E e1, E e2, E e3, E e4,
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E e1, E e2, E e3, E e4,
                                                     E e5)
     {
         EnumSet<E> result = noneOf(e1.getDeclaringClass());
@@ -355,7 +355,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SafeVarargs
     @SideEffectFree
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> of(E first, E... rest) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> of(E first, E... rest) {
         EnumSet<E> result = noneOf(first.getDeclaringClass());
         result.add(first);
         for (E e : rest)
@@ -377,7 +377,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      * @return an enum set initially containing all of the elements in the
      *         range defined by the two specified endpoints
      */
-    public static <E extends Enum<E>> @Modifiable @IteratorPolyShrinkable EnumSet<E> range(E from, E to) {
+    public static <E extends Enum<E>> @Modifiable @IteratorPolyMod EnumSet<E> range(E from, E to) {
         if (from.compareTo(to) > 0)
             throw new IllegalArgumentException(from + " > " + to);
         EnumSet<E> result = noneOf(from.getDeclaringClass());
@@ -399,7 +399,7 @@ public abstract sealed class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable EnumSet<E> clone() {
+    public @Modifiable @IteratorPolyMod EnumSet<E> clone() {
         try {
             return (EnumSet<E>) super.clone();
         } catch(CloneNotSupportedException e) {
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 37dd28cd9805..e2e56d733575 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -963,7 +963,7 @@ public boolean containsValue(@GuardSatisfied HashMap<K, V> this, @GuardSatisfied
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1103,7 +1103,7 @@ public final void forEach(Consumer<? super K> action) {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1170,7 +1170,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/HashSet.java b/src/java.base/share/classes/java/util/HashSet.java
index 7e2cbc161601..5d00823e2713 100644
--- a/src/java.base/share/classes/java/util/HashSet.java
+++ b/src/java.base/share/classes/java/util/HashSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -126,7 +126,7 @@ public class HashSet<E>
      * Constructs a new, empty set; the backing {@code HashMap} instance has
      * default initial capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyShrinkable HashSet() {
+    public @Modifiable @IteratorPolyMod HashSet() {
         map = new HashMap<>();
     }
 
@@ -139,7 +139,7 @@ public class HashSet<E>
      * @param c the collection whose elements are to be placed into this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty HashSet(@PolyNonEmpty Collection<? extends E> c) {
         map = HashMap.newHashMap(Math.max(c.size(), 12));
         addAll(c);
     }
@@ -157,7 +157,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyShrinkable HashSet(@NonNegative int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity, float loadFactor) {
         map = new HashMap<>(initialCapacity, loadFactor);
     }
 
@@ -173,7 +173,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero
      */
-    public @Modifiable @IteratorPolyShrinkable HashSet(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod HashSet(@NonNegative int initialCapacity) {
         map = new HashMap<>(initialCapacity);
     }
 
@@ -190,7 +190,7 @@ public class HashSet<E>
      * @throws     IllegalArgumentException if the initial capacity is less
      *             than zero, or if the load factor is nonpositive
      */
-    @Modifiable @IteratorPolyShrinkable HashSet(int initialCapacity, float loadFactor, boolean dummy) {
+    @Modifiable @IteratorPolyMod HashSet(int initialCapacity, float loadFactor, boolean dummy) {
         map = new LinkedHashMap<>(initialCapacity, loadFactor);
     }
 
@@ -297,7 +297,7 @@ public void clear(@Shrinkable @GuardSatisfied HashSet<E> this) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied HashSet<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied HashSet<E> this) {
         try {
             HashSet<E> newSet = (HashSet<E>) super.clone();
             newSet.map = (HashMap<E, Object>) map.clone();
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index 25d6cb5d38e6..cb7eaf080620 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -710,7 +710,7 @@ private <T> Iterator<T> getIterator(int type) {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (keySet == null)
             keySet = Collections.synchronizedSet(new KeySet(), this);
         return keySet;
@@ -759,7 +759,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied Hashtable<K, V> this) {
         if (entrySet==null)
             entrySet = Collections.synchronizedSet(new EntrySet(), this);
         return entrySet;
@@ -850,7 +850,7 @@ public void clear() {
      * @since 1.2
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied Hashtable<K, V> this) {
         if (values==null)
             values = Collections.synchronizedCollection(new ValueCollection(),
                                                         this);
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 14de6a36e83a..13ad5906714e 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1049,7 +1049,7 @@ private void checkIndexForEntryUse() {
      * @see System#identityHashCode(Object)
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -1169,7 +1169,7 @@ public Spliterator<K> spliterator() {
      * {@code containsAll} methods.</b>
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied IdentityHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1287,7 +1287,7 @@ public Spliterator<V> spliterator() {
      * @return a set view of the identity-mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied IdentityHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         if (es != null)
             return es;
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index e0a284667e46..2dff6128f0f6 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -661,7 +661,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
@@ -828,7 +828,7 @@ public SequencedSet<K> reversed() {
      * @return a view of the values contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedValues();
     }
 
@@ -949,7 +949,7 @@ public SequencedCollection<V> reversed() {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied LinkedHashMap<K, V> this) {
         return sequencedEntrySet();
     }
 
@@ -1268,17 +1268,17 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedKeySet().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedValues().reversed();
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReversedLinkedHashMapView<K,V> this) {
             return base.sequencedEntrySet().reversed();
         }
 
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index 0f2185dc6a6d..b0cd7488430c 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -155,7 +155,7 @@ public class LinkedHashSet<E>
      * @throws     IllegalArgumentException  if the initial capacity is less
      *               than zero, or if the load factor is nonpositive
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(int initialCapacity, float loadFactor) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity, float loadFactor) {
         super(initialCapacity, loadFactor, true);
     }
 
@@ -171,7 +171,7 @@ public class LinkedHashSet<E>
      * @throws  IllegalArgumentException if the initial capacity is less
      *              than zero
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(int initialCapacity) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(int initialCapacity) {
         super(initialCapacity, .75f, true);
     }
 
@@ -179,7 +179,7 @@ public class LinkedHashSet<E>
      * Constructs a new, empty linked hash set with the default initial
      * capacity (16) and load factor (0.75).
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedHashSet() {
+    public @Modifiable @IteratorPolyMod LinkedHashSet() {
         super(16, .75f, true);
     }
 
@@ -193,7 +193,7 @@ public class LinkedHashSet<E>
      *           this set
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedHashSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedHashSet(Collection<? extends E> c) {
         super(HashMap.calculateHashMapCapacity(Math.max(c.size(), 12)), .75f, true);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index 66412ec7c80d..f8ee1602669f 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -32,7 +32,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -144,7 +144,7 @@ void dataStructureInvariants() {
     /**
      * Constructs an empty list.
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedList() {
+    public @Modifiable @IteratorPolyMod LinkedList() {
     }
 
     /**
@@ -155,7 +155,7 @@ void dataStructureInvariants() {
      * @param  c the collection whose elements are to be placed into this list
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty LinkedList(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -1149,7 +1149,7 @@ private LinkedList<E> superClone() {
      * @return a shallow copy of this {@code LinkedList} instance
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied LinkedList<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied LinkedList<E> this) {
         LinkedList<E> clone = superClone();
 
         // Put clone into "virgin" state
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 06e3b0378b3a..e0faf2f7f340 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -34,7 +34,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -494,7 +494,7 @@ public interface List<E> extends SequencedCollection<E> {
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    default void replaceAll(@IteratorPolyShrinkable @Replaceable List<E> this, UnaryOperator<E> operator) {
+    default void replaceAll(@IteratorPolyMod @Replaceable List<E> this, UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final ListIterator<E> li = this.listIterator();
         while (li.hasNext()) {
@@ -564,7 +564,7 @@ default void replaceAll(@IteratorPolyShrinkable @Replaceable List<E> this, Unary
     @SuppressWarnings({"unchecked", "rawtypes"})
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void sort(@IteratorPolyShrinkable @Replaceable List<E> this, Comparator<? super E> c) {
+    default void sort(@IteratorPolyMod @Replaceable List<E> this, Comparator<? super E> c) {
         Object[] a = this.toArray();
         Arrays.sort(a, (Comparator) c);
         ListIterator<E> i = this.listIterator();
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 03a19c816ba2..4ea0da0de19a 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.lock.qual.ReleasesNoLocks;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -404,7 +404,7 @@ public interface Map<K, V> {
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -422,7 +422,7 @@ public interface Map<K, V> {
      * @return a collection view of the values contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Collection<V> values(@PolyShrinkable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -441,7 +441,7 @@ public interface Map<K, V> {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable @PolyNonEmpty Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied @PolyNonEmpty Map<K, V> this);
 
     /**
      * A map entry (key-value pair). The Entry may be unmodifiable, or the
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index 256e88b9449a..51d379b92838 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -36,7 +36,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -313,7 +313,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -330,7 +330,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable NavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable NavigableMap<K, V> this);
 
     /**
      * Returns a view of the portion of this map whose keys range from
diff --git a/src/java.base/share/classes/java/util/PriorityQueue.java b/src/java.base/share/classes/java/util/PriorityQueue.java
index 031a0c01a81f..b5c3777f9d18 100644
--- a/src/java.base/share/classes/java/util/PriorityQueue.java
+++ b/src/java.base/share/classes/java/util/PriorityQueue.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.Positive;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -153,7 +153,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * capacity (11) that orders its elements according to their
      * {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue() {
+    public @Modifiable @IteratorPolyMod PriorityQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -166,7 +166,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue(@Positive int initialCapacity) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -179,7 +179,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      *         natural ordering} of the elements will be used.
      * @since 1.8
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue(Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(Comparator<? super E> comparator) {
         this(DEFAULT_INITIAL_CAPACITY, comparator);
     }
 
@@ -194,7 +194,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is
      *         less than 1
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue(@Positive int initialCapacity,
+    public @Modifiable @IteratorPolyMod PriorityQueue(@Positive int initialCapacity,
                          Comparator<? super E> comparator) {
         // Note: This restriction of at least one is not actually needed,
         // but continues for 1.5 compatibility
@@ -220,7 +220,7 @@ public class PriorityQueue<E extends @NonNull Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty PriorityQueue(@PolyNonEmpty Collection<? extends E> c) {
         if (c instanceof SortedSet<?>) {
             SortedSet<? extends E> ss = (SortedSet<? extends E>) c;
             this.comparator = (Comparator<? super E>) ss.comparator();
@@ -251,7 +251,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified priority queue or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue(PriorityQueue<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(PriorityQueue<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initFromPriorityQueue(c);
     }
@@ -269,7 +269,7 @@ else if (c instanceof PriorityQueue<?>) {
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityQueue(SortedSet<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityQueue(SortedSet<? extends E> c) {
         this.comparator = (Comparator<? super E>) c.comparator();
         initElementsFromCollection(c);
     }
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 7f51a735af03..0d4b048197c7 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -27,7 +27,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1412,19 +1412,19 @@ public synchronized String toString() {
 
     @Override
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrinkable Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor("this") Object> keySet(@PolyShrinkable Properties this) {
         return Collections.synchronizedSet(map.keySet(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<Object> values(@PolyShrinkable Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<Object> values(@PolyShrinkable Properties this) {
         return Collections.synchronizedCollection(map.values(), this);
     }
 
     @Override
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor("this") Object, Object>> entrySet(@PolyModifiable Properties this) {
         return Collections.synchronizedSet(new EntrySet(map.entrySet()), this);
     }
 
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 4dbf8608c87d..c7cf58a7393f 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -115,7 +115,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -130,7 +130,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractCollection<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -145,7 +145,7 @@ public int size() {
     }
 
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable ReverseOrderSortedMapView<K,V> this) {
         return new AbstractSet<>() {
             // inherit add(), which throws UOE
             @SideEffectFree
@@ -438,7 +438,7 @@ public String toString() {
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K, V>> entrySet(@PolyModifiable Submap this) {
             return new AbstractSet<>() {
                 @SideEffectFree
                 public Iterator<Entry<K, V>> iterator() {
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 8b28c96b2220..2bfbc7336e52 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -193,7 +193,7 @@ default E getLast() {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeFirst(@IteratorPolyShrinkable @Shrinkable SequencedCollection<E> this) {
+    default E removeFirst(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
         var it = this.iterator();
         E e = it.next();
         it.remove();
@@ -217,7 +217,7 @@ default E removeFirst(@IteratorPolyShrinkable @Shrinkable SequencedCollection<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default E removeLast(@IteratorPolyShrinkable @Shrinkable SequencedCollection<E> this) {
+    default E removeLast(@IteratorPolyMod @Shrinkable SequencedCollection<E> this) {
         var it = this.reversed().iterator();
         E e = it.next();
         it.remove();
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index f313cc7706e1..5a7c0460749d 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -26,7 +26,7 @@
 package java.util;
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -265,7 +265,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         ascending order
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Collection} view of the values contained in this map.
@@ -286,7 +286,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Returns a {@link Set} view of the mappings contained in this map.
@@ -307,7 +307,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
      *         sorted in ascending key order
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K, V>> entrySet(@PolyModifiable @GuardSatisfied SortedMap<K, V> this);
 
     /**
      * Throws {@code UnsupportedOperationException}. The encounter order induced by this
diff --git a/src/java.base/share/classes/java/util/Stack.java b/src/java.base/share/classes/java/util/Stack.java
index ff0d9802863a..ab8c4b91a1da 100644
--- a/src/java.base/share/classes/java/util/Stack.java
+++ b/src/java.base/share/classes/java/util/Stack.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.CanShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -67,7 +67,7 @@ public class Stack<E> extends Vector<E> {
     /**
      * Creates an empty Stack.
      */
-    public @Modifiable @IteratorPolyShrinkable Stack() {
+    public @Modifiable @IteratorPolyMod Stack() {
     }
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 7d445e2fcbe7..7a81625ea84a 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1199,7 +1199,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return navigableKeySet();
     }
 
@@ -1207,7 +1207,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> navigableKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         KeySet<K> nks = navigableKeySet;
         return (nks != null) ? nks : (navigableKeySet = new KeySet<>(this));
     }
@@ -1216,7 +1216,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @since 1.6
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<@KeyFor({"this"}) K> descendingKeySet(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -1242,7 +1242,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied TreeMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1274,7 +1274,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied TreeMap<K, V> this) {
         EntrySet es = entrySet;
         return (es != null) ? es : (entrySet = new EntrySet());
     }
@@ -2109,19 +2109,19 @@ public final Map.Entry<K,V> pollLastEntry(@Shrinkable NavigableSubMap<K,V> this)
         transient KeySet<K> navigableKeySetView;
 
         @SideEffectFree
-        public final @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public final @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             KeySet<K> nksv = navigableKeySetView;
             return (nksv != null) ? nksv :
                 (navigableKeySetView = new TreeMap.KeySet<>(this));
         }
 
         @SideEffectFree
-        public final @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public final @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return navigableKeySet();
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable NavigableSubMap<K,V> this) {
             return descendingMap().navigableKeySet();
         }
 
@@ -2466,7 +2466,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable AscendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new AscendingEntrySetView());
         }
@@ -2560,7 +2560,7 @@ public Iterator<Map.Entry<K,V>> iterator() {
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<K,V>> entrySet(@PolyModifiable DescendingSubMap<K,V> this) {
             EntrySetView es = entrySetView;
             return (es != null) ? es : (entrySetView = new DescendingEntrySetView());
         }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index ebf216c5f226..0b5a0ab42538 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -29,7 +29,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -131,7 +131,7 @@ public class TreeSet<E> extends AbstractSet<E>
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPolyShrinkable TreeSet(NavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyMod TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -148,7 +148,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPolyShrinkable TreeSet() {
+    public @Modifiable @IteratorPolyMod TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +165,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyShrinkable TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +183,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +195,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -565,7 +565,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/Vector.java b/src/java.base/share/classes/java/util/Vector.java
index 01287b8fdea8..40256d67eb7a 100644
--- a/src/java.base/share/classes/java/util/Vector.java
+++ b/src/java.base/share/classes/java/util/Vector.java
@@ -31,7 +31,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
@@ -167,7 +167,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyShrinkable Vector(@NonNegative int initialCapacity, int capacityIncrement) {
+    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity, int capacityIncrement) {
         super();
         if (initialCapacity < 0)
             throw new IllegalArgumentException("Illegal Capacity: "+
@@ -184,7 +184,7 @@ public class Vector<E>
      * @throws IllegalArgumentException if the specified initial capacity
      *         is negative
      */
-    public @Modifiable @IteratorPolyShrinkable Vector(@NonNegative int initialCapacity) {
+    public @Modifiable @IteratorPolyMod Vector(@NonNegative int initialCapacity) {
         this(initialCapacity, 0);
     }
 
@@ -193,7 +193,7 @@ public class Vector<E>
      * has size {@code 10} and its standard capacity increment is
      * zero.
      */
-    public @Modifiable @IteratorPolyShrinkable Vector() {
+    public @Modifiable @IteratorPolyMod Vector() {
         this(10);
     }
 
@@ -207,7 +207,7 @@ public class Vector<E>
      * @throws NullPointerException if the specified collection is null
      * @since   1.2
      */
-    public @Modifiable @IteratorPolyShrinkable @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod @PolyNonEmpty Vector(@PolyNonEmpty Collection<? extends E> c) {
         Object[] a = c.toArray();
         elementCount = a.length;
         if (c.getClass() == ArrayList.class) {
@@ -721,7 +721,7 @@ public synchronized void removeAllElements(@Shrinkable @GuardSatisfied @CanShrin
      * @return  a clone of this vector
      */
     @SideEffectFree
-    public synchronized @Modifiable @IteratorPolyShrinkable Object clone(@GuardSatisfied Vector<E> this) {
+    public synchronized @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied Vector<E> this) {
         try {
             @SuppressWarnings("unchecked")
             Vector<E> v = (Vector<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/WeakHashMap.java b/src/java.base/share/classes/java/util/WeakHashMap.java
index fc77fa2b261e..64ffd9d6764f 100644
--- a/src/java.base/share/classes/java/util/WeakHashMap.java
+++ b/src/java.base/share/classes/java/util/WeakHashMap.java
@@ -28,7 +28,7 @@
 import org.checkerframework.checker.index.qual.NonNegative;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -935,7 +935,7 @@ public Map.Entry<K,V> next(@NonEmpty EntryIterator this) {
      * operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<K> ks = keySet;
         if (ks == null) {
             ks = new KeySet();
@@ -998,7 +998,7 @@ public Spliterator<K> spliterator() {
      * support the {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable @GuardSatisfied WeakHashMap<K, V> this) {
         Collection<V> vs = values;
         if (vs == null) {
             vs = new Values();
@@ -1051,7 +1051,7 @@ public Spliterator<V> spliterator() {
      * {@code add} or {@code addAll} operations.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied WeakHashMap<K, V> this) {
         Set<Map.Entry<K,V>> es = entrySet;
         return es != null ? es : (entrySet = new EntrySet());
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
index 534500453a2c..fbdcfa6bd5ff 100644
--- a/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ArrayBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -277,7 +277,7 @@ void removeAt(final int removeIndex) {
      * @param capacity the capacity of this queue
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity) {
         this(capacity, false);
     }
 
@@ -291,7 +291,7 @@ void removeAt(final int removeIndex) {
      *        if {@code false} the access order is unspecified.
      * @throws IllegalArgumentException if {@code capacity < 1}
      */
-    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity, boolean fair) {
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair) {
         if (capacity <= 0)
             throw new IllegalArgumentException();
         this.items = new Object[capacity];
@@ -316,7 +316,7 @@ void removeAt(final int removeIndex) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable ArrayBlockingQueue(int capacity, boolean fair,
+    public @Modifiable @IteratorPolyMod ArrayBlockingQueue(int capacity, boolean fair,
                               Collection<? extends E> c) {
         this(capacity, fair);
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 42b7f2c02b0b..5e565d20aa2e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1286,7 +1286,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable KeySetView<@KeyFor({"this"}) K,V> keySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         KeySetView<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySetView<K,V>(this, null);
@@ -1311,7 +1311,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the collection view
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         ValuesView<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new ValuesView<K,V>(this);
@@ -1335,7 +1335,7 @@ else if ((fh = f.hash) == MOVED) {
      * @return the set view
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Modifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable ConcurrentHashMap<K,V> this) {
         EntrySetView<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySetView<K,V>(this);
@@ -2297,7 +2297,7 @@ public static <K> KeySetView<K,Boolean> newKeySet(int initialCapacity) {
      * @throws NullPointerException if the mappedValue is null
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable KeySetView<K,V> keySet(V mappedValue) {
+    public @IteratorPolyMod KeySetView<K,V> keySet(V mappedValue) {
         if (mappedValue == null)
             throw new NullPointerException();
         return new KeySetView<K,V>(this, mappedValue);
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 6ee1f47d871b..c69000e14e8c 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -793,7 +793,7 @@ private E screenNullResult(@NonNull E v) {
     /**
      * Constructs an empty deque.
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedDeque() {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque() {
         head = tail = new Node<E>();
     }
 
@@ -806,7 +806,7 @@ private E screenNullResult(@NonNull E v) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedDeque(Collection<? extends E> c) {
         // Copy c into a private chain of Nodes
         Node<E> h = null, t = null;
         for (E e : c) {
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
index 514a55f20d7c..9079977b71da 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -265,7 +265,7 @@ boolean casItem(E cmp, E val) {
     /**
      * Creates a {@code ConcurrentLinkedQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedQueue() {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue() {
         head = tail = new Node<E>();
     }
 
@@ -278,7 +278,7 @@ boolean casItem(E cmp, E val) {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentLinkedQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentLinkedQueue(Collection<? extends E> c) {
         Node<E> h = null, t = null;
         for (E e : c) {
             Node<E> newNode = new Node<E>(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index fca57cd36cb6..88089e87c66f 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -35,7 +35,7 @@
 
 package java.util.concurrent;
 
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -147,7 +147,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a {@link NavigableSet} view of the keys contained in this map.
@@ -168,7 +168,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 
     /**
      * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
@@ -187,5 +187,5 @@ public interface ConcurrentNavigableMap<K,V>
      * @return a reverse order navigable set view of the keys in this map
      */
     @SideEffectFree
-    @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
+    @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentNavigableMap<K, V> this);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 62b7c4986535..424905b57961 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -37,7 +37,7 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
@@ -1654,14 +1654,14 @@ else if (doRemove(key, v) != null)
      * @return a navigable set view of the keys in this map
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
     }
 
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         KeySet<K,V> ks;
         if ((ks = keySet) != null) return ks;
         return keySet = new KeySet<>(this);
@@ -1687,7 +1687,7 @@ else if (doRemove(key, v) != null)
      * <a href="package-summary.html#Weakly"><i>weakly consistent</i></a>.
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         Values<K,V> vs;
         if ((vs = values) != null) return vs;
         return values = new Values<>(this);
@@ -1721,7 +1721,7 @@ else if (doRemove(key, v) != null)
      *         sorted in ascending key order
      */
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         EntrySet<K,V> es;
         if ((es = entrySet) != null) return es;
         return entrySet = new EntrySet<K,V>(this);
@@ -1736,7 +1736,7 @@ else if (doRemove(key, v) != null)
     }
 
     @SideEffectFree
-    public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> descendingKeySet(@PolyShrinkable ConcurrentSkipListMap<K,V> this) {
         return descendingMap().navigableKeySet();
     }
 
@@ -3066,35 +3066,35 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable SubMap<K,V> this) {
         /* ---------------- Submap Views -------------- */
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> keySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable NavigableSet<K> navigableKeySet(@PolyShrinkable SubMap<K,V> this) {
             KeySet<K,V> ks;
             if ((ks = keySetView) != null) return ks;
             return keySetView = new KeySet<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Collection<V> values(@PolyShrinkable SubMap<K,V> this) {
             Values<K,V> vs;
             if ((vs = valuesView) != null) return vs;
             return valuesView = new Values<>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable SubMap<K,V> this) {
+        public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@Unmodifiable Entry<K,V>> entrySet(@PolyShrinkable SubMap<K,V> this) {
             EntrySet<K,V> es;
             if ((es = entrySetView) != null) return es;
             return entrySetView = new EntrySet<K,V>(this);
         }
 
         @SideEffectFree
-        public @IteratorPolyShrinkable NavigableSet<K> descendingKeySet() {
+        public @IteratorPolyMod NavigableSet<K> descendingKeySet() {
             return descendingMap().navigableKeySet();
         }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index d1435b728f1c..31fda8731889 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -38,7 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -132,7 +132,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet() {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +144,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +159,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +172,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +180,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Modifiable @IteratorPolyMod ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +191,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyShrinkable ConcurrentSkipListSet<E> clone() {
+    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
index 64359e6171a2..83abe7bfab5b 100644
--- a/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/DelayQueue.java
@@ -36,7 +36,7 @@
 package java.util.concurrent;
 
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -154,7 +154,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
     /**
      * Creates a new {@code DelayQueue} that is initially empty.
      */
-    public @Modifiable @IteratorPolyShrinkable DelayQueue() {}
+    public @Modifiable @IteratorPolyMod DelayQueue() {}
 
     /**
      * Creates a {@code DelayQueue} initially containing the elements of the
@@ -164,7 +164,7 @@ public class DelayQueue<E extends @NonNull Delayed> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable DelayQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod DelayQueue(Collection<? extends E> c) {
         this.addAll(c);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 14cfadf8ca79..1e040688930a 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -194,7 +194,7 @@ static final class Node<E> {
      * Creates a {@code LinkedBlockingDeque} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque() {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque() {
         this(Integer.MAX_VALUE);
     }
 
@@ -204,7 +204,7 @@ static final class Node<E> {
      * @param capacity the capacity of this deque
      * @throws IllegalArgumentException if {@code capacity} is less than 1
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque(int capacity) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
     }
@@ -219,7 +219,7 @@ static final class Node<E> {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingDeque(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingDeque(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         addAll(c);
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
index 3c00956bfb7d..b61bc66101a0 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -264,7 +264,7 @@ void fullyUnlock() {
      * Creates a {@code LinkedBlockingQueue} with a capacity of
      * {@link Integer#MAX_VALUE}.
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue() {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue() {
         this(Integer.MAX_VALUE);
     }
 
@@ -275,7 +275,7 @@ void fullyUnlock() {
      * @throws IllegalArgumentException if {@code capacity} is not greater
      *         than zero
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue(int capacity) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(int capacity) {
         if (capacity <= 0) throw new IllegalArgumentException();
         this.capacity = capacity;
         last = head = new Node<E>(null);
@@ -291,7 +291,7 @@ void fullyUnlock() {
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedBlockingQueue(Collection<? extends E> c) {
         this(Integer.MAX_VALUE);
         final ReentrantLock putLock = this.putLock;
         putLock.lock(); // Never contended, but necessary for visibility
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
index 53994bc0f49e..49a1bbbc0ffe 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedTransferQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -1183,7 +1183,7 @@ else if (s == n)    // stale
     /**
      * Creates an initially empty {@code LinkedTransferQueue}.
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedTransferQueue() {
+    public @Modifiable @IteratorPolyMod LinkedTransferQueue() {
         head = tail = new Node();
     }
 
@@ -1196,7 +1196,7 @@ else if (s == n)    // stale
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable LinkedTransferQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod LinkedTransferQueue(Collection<? extends E> c) {
         Node h = null, t = null;
         for (E e : c) {
             Node newNode = new Node(Objects.requireNonNull(e));
diff --git a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
index 9deb7bdeccde..ebfd837c2ef8 100644
--- a/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
+++ b/src/java.base/share/classes/java/util/concurrent/PriorityBlockingQueue.java
@@ -39,7 +39,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
-import org.checkerframework.checker.modifiability.qual.IteratorPolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
@@ -210,7 +210,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * initial capacity (11) that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue() {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue() {
         this(DEFAULT_INITIAL_CAPACITY, null);
     }
 
@@ -223,7 +223,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(int initialCapacity) {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity) {
         this(initialCapacity, null);
     }
 
@@ -239,7 +239,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws IllegalArgumentException if {@code initialCapacity} is less
      *         than 1
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(int initialCapacity,
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(int initialCapacity,
                                  Comparator<? super E> comparator) {
         if (initialCapacity < 1)
             throw new IllegalArgumentException();
@@ -263,7 +263,7 @@ public class PriorityBlockingQueue<E extends Object> extends AbstractQueue<E>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyShrinkable PriorityBlockingQueue(Collection<? extends E> c) {
+    public @Modifiable @IteratorPolyMod PriorityBlockingQueue(Collection<? extends E> c) {
         boolean heapify = true; // true if not known to be in heap order
         boolean screen = true;  // true if must screen for nulls
         if (c instanceof SortedSet<?>) {

From f210aa52d9b91bd662af5cd43bb9f2a218edeee1 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 31 May 2026 13:31:56 -0700
Subject: [PATCH 101/119] update checker qual.

---
 checker-qual.jar                              | Bin 291812 -> 292495 bytes
 .../modifiability/qual/IteratorPolyMod.java   |  27 ++++++++++++++++++
 .../qual/IteratorPolyShrinkable.java          |  23 ---------------
 ...inkable.java => MaybeIteratorPolyMod.java} |   4 +--
 .../qual/PreservesModifiability.java          |  25 ++++++++++++++++
 5 files changed, 54 insertions(+), 25 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
 delete mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
 rename src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/{MaybeIteratorPolyShrinkable.java => MaybeIteratorPolyMod.java} (90%)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java

diff --git a/checker-qual.jar b/checker-qual.jar
index fbd435a517ff42057757a020a1a2d8e808d055b8..1860c4b7e246d64531c204307d7690e6132758c1 100644
GIT binary patch
delta 6777
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diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
new file mode 100644
index 000000000000..ec4c8d2b8de1
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -0,0 +1,27 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} and {@code
+ * listIterator()} methods preserves the ability to call modification methods in its iterator.
+ *
+ * <p>For example, if collection {@code c} has type {@code @Shrinkable}, then {@code c.iterator()}
+ * also has type {@code @Shrinkable}. If list {@code l} has type {@code @Replaceable}, then {@code
+ * l.listIterator()} also has type {@code @Replaceable}. For any collection whose type is
+ * {@code @MaybeIteratorPolyMod}, its iterator is always {@code @MaybeShrinkable}.
+ *
+ * <p>This annotation is used in GrowChecker, ShrinkChecker, and ReplaceChecker.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(MaybeIteratorPolyMod.class)
+public @interface IteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
deleted file mode 100644
index fb4fd4ea8528..000000000000
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyShrinkable.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package org.checkerframework.checker.modifiability.qual;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-import org.checkerframework.framework.qual.SubtypeOf;
-
-/**
- * If a collection's type is {@code @IteratorPolyShrinkable}, then its {@code iterator()} method preserves
- * the ability to call {@code Iterator.remove()}. That is, if collection {@code c} has type
- * {@code @Shrinkable}, then {@code c.iterator()} also has type {@code @Shrinkable}. For any
- * collection whose type is {@code @MaybeIteratorPolyShrinkable}, its iterator is always
- * {@code @Unshrinkable}.
- *
- * @checker_framework.manual #modifiability-checker Modifiability Checker
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
-@SubtypeOf(MaybeIteratorPolyShrinkable.class)
-public @interface IteratorPolyShrinkable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
similarity index 90%
rename from src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java
rename to src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
index e48346a6d48d..f113fdc671f6 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyShrinkable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
@@ -13,7 +13,7 @@
  *
  * <p>This is the default qualifier for unannotated types.
  *
- * @see IteratorPolyShrinkable
+ * @see IteratorPolyMod
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
 @Documented
@@ -21,4 +21,4 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
-public @interface MaybeIteratorPolyShrinkable {}
+public @interface MaybeIteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java
new file mode 100644
index 000000000000..5bbcc4f6e677
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java
@@ -0,0 +1,25 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * The annotated method preserves modifiability capabilities from its first argument to its return
+ * value.
+ *
+ * <p>For example, if the first argument is {@code @Modifiable} or {@code @IteratorPolyMod}, then
+ * the return type is also {@code @Modifiable} or {@code @IteratorPolyMod}. If the first argument is
+ * anything other than {@code @Modifiable} or {@code @IteratorPolyMod}, then the return type is the
+ * top {@code @MaybeModifiable}.
+ *
+ * <p>If the annotated method has no parameters, then this annotation has no effect on the method.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface PreservesModifiability {}

From 28addfae749e1fabe0ec71444f32573e1a5312c2 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 1 Jun 2026 13:03:28 -0700
Subject: [PATCH 102/119] annotated @SeqGrowable on addFirst and addLast.

---
 .../share/classes/java/util/ArrayDeque.java   | 11 +++++-----
 .../share/classes/java/util/ArrayList.java    |  5 +++--
 .../share/classes/java/util/Deque.java        | 11 +++++-----
 .../classes/java/util/LinkedHashMap.java      |  4 ++++
 .../classes/java/util/LinkedHashSet.java      | 11 +++++-----
 .../share/classes/java/util/LinkedList.java   | 21 ++++++++++---------
 .../share/classes/java/util/List.java         |  5 +++--
 .../java/util/SequencedCollection.java        |  6 +++---
 .../share/classes/java/util/SortedSet.java    |  8 ++++---
 .../share/classes/java/util/TreeSet.java      | 15 ++++++-------
 .../java/util/concurrent/BlockingDeque.java   | 19 +++++++++--------
 .../concurrent/ConcurrentLinkedDeque.java     | 11 +++++-----
 .../concurrent/ConcurrentSkipListSet.java     | 17 ++++++++-------
 .../util/concurrent/CopyOnWriteArrayList.java | 13 ++++++------
 .../util/concurrent/LinkedBlockingDeque.java  | 19 +++++++++--------
 15 files changed, 97 insertions(+), 79 deletions(-)

diff --git a/src/java.base/share/classes/java/util/ArrayDeque.java b/src/java.base/share/classes/java/util/ArrayDeque.java
index df6f3a597294..612c48fbdc30 100644
--- a/src/java.base/share/classes/java/util/ArrayDeque.java
+++ b/src/java.base/share/classes/java/util/ArrayDeque.java
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -310,7 +311,7 @@ static final <E> E nonNullElementAt(@PolyNull @PolySigned Object[] es, int i) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+    public void addFirst(@SeqGrowable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
@@ -330,7 +331,7 @@ public void addFirst(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+    public void addLast(@SeqGrowable @GuardSatisfied ArrayDeque<E> this, E e) {
         if (e == null)
             throw new NullPointerException();
         final Object[] es = elements;
@@ -372,7 +373,7 @@ private void copyElements(Collection<? extends E> c) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
+    public boolean offerFirst(@SeqGrowable ArrayDeque<E> this, E e) {
         addFirst(e);
         return true;
     }
@@ -386,7 +387,7 @@ public boolean offerFirst(@Growable ArrayDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable ArrayDeque<E> this, E e) {
+    public boolean offerLast(@SeqGrowable ArrayDeque<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -644,7 +645,7 @@ public E element(@GuardSatisfied @NonEmpty ArrayDeque<E> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable @GuardSatisfied ArrayDeque<E> this, E e) {
+    public void push(@SeqGrowable @GuardSatisfied ArrayDeque<E> this, E e) {
         addFirst(e);
     }
 
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index dd0a291b1960..416d51738c60 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -35,6 +35,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -593,7 +594,7 @@ public void add(@Growable @GuardSatisfied ArrayList<E> this, @NonNegative int in
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable ArrayList<E> this, E element) {
+    public void addFirst(@SeqGrowable ArrayList<E> this, E element) {
         add(0, element);
     }
 
@@ -605,7 +606,7 @@ public void addFirst(@Growable ArrayList<E> this, E element) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable ArrayList<E> this, E element) {
+    public void addLast(@SeqGrowable ArrayList<E> this, E element) {
         add(element);
     }
 
diff --git a/src/java.base/share/classes/java/util/Deque.java b/src/java.base/share/classes/java/util/Deque.java
index 413f1c10a16e..9a1521435691 100644
--- a/src/java.base/share/classes/java/util/Deque.java
+++ b/src/java.base/share/classes/java/util/Deque.java
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -243,7 +244,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void addFirst(@Growable @GuardSatisfied Deque<E> this, E e);
+    void addFirst(@SeqGrowable @GuardSatisfied Deque<E> this, E e);
     /**
      * Inserts the specified element at the end of this deque if it is
      * possible to do so immediately without violating capacity restrictions,
@@ -266,7 +267,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void addLast(@Growable @GuardSatisfied Deque<E> this, E e);
+    void addLast(@SeqGrowable @GuardSatisfied Deque<E> this, E e);
     /**
      * Inserts the specified element at the front of this deque unless it would
      * violate capacity restrictions.  When using a capacity-restricted deque,
@@ -285,7 +286,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerFirst(@Growable Deque<E> this, E e);
+    boolean offerFirst(@SeqGrowable Deque<E> this, E e);
     /**
      * Inserts the specified element at the end of this deque unless it would
      * violate capacity restrictions.  When using a capacity-restricted deque,
@@ -304,7 +305,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerLast(@Growable Deque<E> this, E e);
+    boolean offerLast(@SeqGrowable Deque<E> this, E e);
     /**
      * Retrieves and removes the first element of this deque.  This method
      * differs from {@link #pollFirst pollFirst} only in that it throws an
@@ -583,7 +584,7 @@ public interface Deque<E> extends Queue<E>, SequencedCollection<E> {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void push(@Growable @GuardSatisfied Deque<E> this, E e);
+    void push(@SeqGrowable @GuardSatisfied Deque<E> this, E e);
     /**
      * Pops an element from the stack represented by this deque.  In other
      * words, removes and returns the first element of this deque.
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 2dff6128f0f6..443bcefe7b22 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -728,6 +729,7 @@ final <T> T[] valuesToArray(T[] a, boolean reversed) {
         return a;
     }
 
+    @SeqUngrowable
     final class LinkedKeySet extends AbstractSet<K> implements SequencedSet<K> {
         final boolean reversed;
         LinkedKeySet(boolean reversed)          { this.reversed = reversed; }
@@ -854,6 +856,7 @@ public SequencedSet<K> reversed() {
         }
     }
 
+    @SeqUngrowable
     final class LinkedValues extends AbstractCollection<V> implements SequencedCollection<V> {
         final boolean reversed;
         LinkedValues(boolean reversed)          { this.reversed = reversed; }
@@ -975,6 +978,7 @@ public SequencedCollection<V> reversed() {
         }
     }
 
+    @SeqUngrowable
     final class LinkedEntrySet extends AbstractSet<Map.Entry<K,V>>
         implements SequencedSet<Map.Entry<K,V>> {
         final boolean reversed;
diff --git a/src/java.base/share/classes/java/util/LinkedHashSet.java b/src/java.base/share/classes/java/util/LinkedHashSet.java
index b0cd7488430c..20b29b39da0a 100644
--- a/src/java.base/share/classes/java/util/LinkedHashSet.java
+++ b/src/java.base/share/classes/java/util/LinkedHashSet.java
@@ -29,6 +29,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -236,7 +237,7 @@ public Spliterator<E> spliterator() {
      * @throws IllegalArgumentException if numElements is negative
      * @since 19
      */
-    public static <T> LinkedHashSet<T> newLinkedHashSet(int numElements) {
+    public static <T> @Modifiable LinkedHashSet<T> newLinkedHashSet(int numElements) {
         if (numElements < 0) {
             throw new IllegalArgumentException("Negative number of elements: " + numElements);
         }
@@ -260,7 +261,7 @@ LinkedHashMap<E, Object> map() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable LinkedHashSet<E> this, E e) {
+    public void addFirst(@SeqGrowable LinkedHashSet<E> this, E e) {
         map().putFirst(e, PRESENT);
     }
 
@@ -275,7 +276,7 @@ public void addFirst(@Growable LinkedHashSet<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable LinkedHashSet<E> this, E e) {
+    public void addLast(@SeqGrowable LinkedHashSet<E> this, E e) {
         map().putLast(e, PRESENT);
     }
 
@@ -345,8 +346,8 @@ class ReverseLinkedHashSetView extends AbstractSet<E> implements SequencedSet<E>
             @SideEffectFree
             public Iterator<E> iterator()      { return map().sequencedKeySet().reversed().iterator(); }
             public boolean add(@Growable ReverseLinkedHashSetView this, E e)            { return LinkedHashSet.this.add(e); }
-            public void addFirst(@Growable ReverseLinkedHashSetView this, E e)          { LinkedHashSet.this.addLast(e); }
-            public void addLast(@Growable ReverseLinkedHashSetView this, E e)           { LinkedHashSet.this.addFirst(e); }
+            public void addFirst(@SeqGrowable ReverseLinkedHashSetView this, E e)       { LinkedHashSet.this.addLast(e); }
+            public void addLast(@SeqGrowable ReverseLinkedHashSetView this, E e)        { LinkedHashSet.this.addFirst(e); }
             @Pure
             public E getFirst()                { return LinkedHashSet.this.getLast(); }
             @Pure
diff --git a/src/java.base/share/classes/java/util/LinkedList.java b/src/java.base/share/classes/java/util/LinkedList.java
index f8ee1602669f..440ad36f6f67 100644
--- a/src/java.base/share/classes/java/util/LinkedList.java
+++ b/src/java.base/share/classes/java/util/LinkedList.java
@@ -36,6 +36,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -341,7 +342,7 @@ public E removeLast(@Shrinkable @GuardSatisfied @NonEmpty @CanShrink LinkedList<
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+    public void addFirst(@SeqGrowable @GuardSatisfied LinkedList<E> this, E e) {
         linkFirst(e);
     }
 
@@ -355,7 +356,7 @@ public void addFirst(@Growable @GuardSatisfied LinkedList<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+    public void addLast(@SeqGrowable @GuardSatisfied LinkedList<E> this, E e) {
         linkLast(e);
     }
 
@@ -798,7 +799,7 @@ public boolean offer(@Growable LinkedList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable LinkedList<E> this, E e) {
+    public boolean offerFirst(@SeqGrowable LinkedList<E> this, E e) {
         addFirst(e);
         return true;
     }
@@ -812,7 +813,7 @@ public boolean offerFirst(@Growable LinkedList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable LinkedList<E> this, E e) {
+    public boolean offerLast(@SeqGrowable LinkedList<E> this, E e) {
         addLast(e);
         return true;
     }
@@ -886,7 +887,7 @@ public boolean offerLast(@Growable LinkedList<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable @GuardSatisfied LinkedList<E> this, E e) {
+    public void push(@SeqGrowable @GuardSatisfied LinkedList<E> this, E e) {
         addFirst(e);
     }
 
@@ -1554,7 +1555,7 @@ public E pop() {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void push(E e) {
+        public void push(@SeqGrowable ReverseOrderLinkedListView<E> this, E e) {
             rdeque.push(e);
         }
 
@@ -1582,13 +1583,13 @@ public E peekFirst() {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean offerLast(E e) {
+        public boolean offerLast(@SeqGrowable ReverseOrderLinkedListView<E> this, E e) {
             return rdeque.offerLast(e);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public boolean offerFirst(E e) {
+        public boolean offerFirst(@SeqGrowable ReverseOrderLinkedListView<E> this, E e) {
             return rdeque.offerFirst(e);
         }
 
@@ -1698,13 +1699,13 @@ public boolean contains(Object o) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addLast(E e) {
+        public void addLast(@SeqGrowable ReverseOrderLinkedListView<E> this, E e) {
             rdeque.addLast(e);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addFirst(E e) {
+        public void addFirst(@SeqGrowable ReverseOrderLinkedListView<E> this, E e) {
             rdeque.addFirst(e);
         }
 
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index e0faf2f7f340..80328ab47f7a 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -39,6 +39,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -873,7 +874,7 @@ default Spliterator<E> spliterator() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addFirst(@Growable List<E> this, E e) {
+    default void addFirst(@SeqGrowable List<E> this, E e) {
         this.add(0, e);
     }
 
@@ -890,7 +891,7 @@ default void addFirst(@Growable List<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addLast(@Growable List<E> this, E e) {
+    default void addLast(@SeqGrowable List<E> this, E e) {
         this.add(e);
     }
 
diff --git a/src/java.base/share/classes/java/util/SequencedCollection.java b/src/java.base/share/classes/java/util/SequencedCollection.java
index 2bfbc7336e52..d3ddf4bcceca 100644
--- a/src/java.base/share/classes/java/util/SequencedCollection.java
+++ b/src/java.base/share/classes/java/util/SequencedCollection.java
@@ -25,8 +25,8 @@
 
 package java.util;
 
-import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.dataflow.qual.Pure;
@@ -115,7 +115,7 @@ public interface SequencedCollection<E> extends Collection<E> {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addFirst(@Growable SequencedCollection<E> this, E e) {
+    default void addFirst(@SeqGrowable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -136,7 +136,7 @@ default void addFirst(@Growable SequencedCollection<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default void addLast(@Growable SequencedCollection<E> this, E e) {
+    default void addLast(@SeqGrowable SequencedCollection<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 988996877d9c..5478da47d74b 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -27,6 +27,8 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -120,7 +122,7 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public interface SortedSet<E> extends Set<E>, SequencedSet<E> {
+public @SeqUngrowable interface SortedSet<E> extends Set<E>, SequencedSet<E> {
     /**
      * Returns the comparator used to order the elements in this set,
      * or {@code null} if this set uses the {@linkplain Comparable
@@ -302,7 +304,7 @@ public Comparator<? super E> getComparator() {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    default void addFirst(E e) {
+    default void addFirst(@SeqGrowable SortedSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -321,7 +323,7 @@ default void addFirst(E e) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    default void addLast(E e) {
+    default void addLast(@SeqGrowable SortedSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 0b5a0ab42538..d9784f533b62 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -30,8 +30,9 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -117,7 +118,7 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness", "modifiability"})
-public class TreeSet<E> extends AbstractSet<E>
+public @SeqUngrowable class TreeSet<E> extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable
 {
     /**
@@ -148,7 +149,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * integers), the {@code add} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable @IteratorPolyMod TreeSet() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod TreeSet() {
         this(new TreeMap<>());
     }
 
@@ -165,7 +166,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyMod TreeSet(@Nullable Comparator<? super E> comparator) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod TreeSet(@Nullable Comparator<? super E> comparator) {
         this(new TreeMap<>(comparator));
     }
 
@@ -183,7 +184,7 @@ public class TreeSet<E> extends AbstractSet<E>
      *         not {@link Comparable}, or are not mutually comparable
      * @throws NullPointerException if the specified collection is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty Collection<? extends E> c) {
         this();
         addAll(c);
     }
@@ -195,7 +196,7 @@ public class TreeSet<E> extends AbstractSet<E>
      * @param s sorted set whose elements will comprise the new set
      * @throws NullPointerException if the specified sorted set is null
      */
-    public @Modifiable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod @PolyNonEmpty TreeSet(@PolyNonEmpty SortedSet<E> s) {
         this(s.comparator());
         addAll(s);
     }
@@ -565,7 +566,7 @@ public void addLast(E e) {
      */
     @SideEffectFree
     @SuppressWarnings("unchecked")
-    public @Modifiable @IteratorPolyMod Object clone(@GuardSatisfied TreeSet<E> this) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod Object clone(@GuardSatisfied TreeSet<E> this) {
         TreeSet<E> clone;
         try {
             clone = (TreeSet<E>) super.clone();
diff --git a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
index 83e96170b34e..8e646e55a116 100644
--- a/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/BlockingDeque.java
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -239,7 +240,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void addFirst(@Growable BlockingDeque<E> this, E e);
+    void addFirst(@SeqGrowable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -257,7 +258,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void addLast(@Growable BlockingDeque<E> this, E e);
+    void addLast(@SeqGrowable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque if it is
@@ -275,7 +276,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerFirst(@Growable BlockingDeque<E> this, E e);
+    boolean offerFirst(@SeqGrowable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the end of this deque if it is
@@ -293,7 +294,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerLast(@Growable BlockingDeque<E> this, E e);
+    boolean offerLast(@SeqGrowable BlockingDeque<E> this, E e);
 
     /**
      * Inserts the specified element at the front of this deque,
@@ -309,7 +310,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void putFirst(@Growable BlockingDeque<E> this, E e) throws InterruptedException;
+    void putFirst(@SeqGrowable BlockingDeque<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element at the end of this deque,
@@ -325,7 +326,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void putLast(@Growable BlockingDeque<E> this, E e) throws InterruptedException;
+    void putLast(@SeqGrowable BlockingDeque<E> this, E e) throws InterruptedException;
 
     /**
      * Inserts the specified element at the front of this deque,
@@ -348,7 +349,7 @@ public interface BlockingDeque<E extends @NonNull Object> extends BlockingQueue<
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerFirst(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
+    boolean offerFirst(@SeqGrowable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -372,7 +373,7 @@ boolean offerFirst(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    boolean offerLast(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
+    boolean offerLast(@SeqGrowable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
         throws InterruptedException;
 
     /**
@@ -722,5 +723,5 @@ boolean offer(@Growable BlockingDeque<E> this, E e, long timeout, TimeUnit unit)
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void push(@Growable BlockingDeque<E> this, E e);
+    void push(@SeqGrowable BlockingDeque<E> this, E e);
 }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index c69000e14e8c..cf6fbee91ae1 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -851,7 +852,7 @@ private void initHeadTail(Node<E> h, Node<E> t) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
+    public void addFirst(@SeqGrowable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
     }
 
@@ -867,7 +868,7 @@ public void addFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
+    public void addLast(@SeqGrowable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
     }
 
@@ -880,7 +881,7 @@ public void addLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
+    public boolean offerFirst(@SeqGrowable ConcurrentLinkedDeque<E> this, E e) {
         linkFirst(e);
         return true;
     }
@@ -896,7 +897,7 @@ public boolean offerFirst(@Growable ConcurrentLinkedDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable ConcurrentLinkedDeque<E> this, E e) {
+    public boolean offerLast(@SeqGrowable ConcurrentLinkedDeque<E> this, E e) {
         linkLast(e);
         return true;
     }
@@ -1073,7 +1074,7 @@ public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable ConcurrentLinkedDeque<E> this, E e)     { addFirst(e); }
+    public void push(@SeqGrowable ConcurrentLinkedDeque<E> this, E e)  { addFirst(e); }
     /**
      * Removes the first occurrence of the specified element from this deque.
      * If the deque does not contain the element, it is unchanged.
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 31fda8731889..3d04502dac72 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -39,8 +39,9 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -114,7 +115,7 @@
  * @since 1.6
  */
 @AnnotatedFor({"nullness", "modifiability"})
-public class ConcurrentSkipListSet<E extends @NonNull Object>
+public @SeqUngrowable class ConcurrentSkipListSet<E extends @NonNull Object>
     extends AbstractSet<E>
     implements NavigableSet<E>, Cloneable, java.io.Serializable {
 
@@ -132,7 +133,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * Constructs a new, empty set that orders its elements according to
      * their {@linkplain Comparable natural ordering}.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet() {
         m = new ConcurrentSkipListMap<E,Object>();
     }
 
@@ -144,7 +145,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the elements will be used.
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet(@Nullable Comparator<? super E> comparator) {
         m = new ConcurrentSkipListMap<E,Object>(comparator);
     }
 
@@ -159,7 +160,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified collection or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(Collection<? extends E> c) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet(Collection<? extends E> c) {
         m = new ConcurrentSkipListMap<E,Object>();
         addAll(c);
     }
@@ -172,7 +173,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @throws NullPointerException if the specified sorted set or any
      *         of its elements are null
      */
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet(SortedSet<E> s) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet(SortedSet<E> s) {
         m = new ConcurrentSkipListMap<E,Object>(s.comparator());
         addAll(s);
     }
@@ -180,7 +181,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
     /**
      * For use by submaps
      */
-    @Modifiable @IteratorPolyMod ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
+    @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet(ConcurrentNavigableMap<E,Object> m) {
         this.m = m;
     }
 
@@ -191,7 +192,7 @@ public class ConcurrentSkipListSet<E extends @NonNull Object>
      * @return a shallow copy of this set
      */
     @SideEffectFree
-    public @Modifiable @IteratorPolyMod ConcurrentSkipListSet<E> clone() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod ConcurrentSkipListSet<E> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListSet<E> clone =
diff --git a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
index f6b4be48d157..2f91762d334a 100644
--- a/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
+++ b/src/java.base/share/classes/java/util/concurrent/CopyOnWriteArrayList.java
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
@@ -562,7 +563,7 @@ public void add(@Growable CopyOnWriteArrayList<E> this, int index, E element) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
+    public void addFirst(@SeqGrowable CopyOnWriteArrayList<E> this, E e) {
         add(0, e);
     }
 
@@ -574,7 +575,7 @@ public void addFirst(@Growable CopyOnWriteArrayList<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable CopyOnWriteArrayList<E> this, E e) {
+    public void addLast(@SeqGrowable CopyOnWriteArrayList<E> this, E e) {
         synchronized (lock) {
             add(getArray().length, e);
         }
@@ -1628,13 +1629,13 @@ public void add(int index, E element) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addFirst(E e) {
+        public void addFirst(@SeqGrowable COWSubList this, E e) {
             add(0, e);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addLast(E e) {
+        public void addLast(@SeqGrowable COWSubList this, E e) {
             synchronized (lock) {
                 add(size, e);
             }
@@ -2176,13 +2177,13 @@ public void add(int index, E element) {
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addFirst(E e) {
+        public void addFirst(@SeqGrowable Reversed<E> this, E e) {
             base.add(e);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public void addLast(E e) {
+        public void addLast(@SeqGrowable Reversed<E> this, E e) {
             base.add(0, e);
         }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
index 1e040688930a..2403fd060e11 100644
--- a/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/LinkedBlockingDeque.java
@@ -42,6 +42,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -341,7 +342,7 @@ void unlink(@CanShrink LinkedBlockingDeque<E> this, Node<E> x) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
+    public void addFirst(@SeqGrowable LinkedBlockingDeque<E> this, E e) {
         if (!offerFirst(e))
             throw new IllegalStateException("Deque full");
     }
@@ -353,7 +354,7 @@ public void addFirst(@Growable LinkedBlockingDeque<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
+    public void addLast(@SeqGrowable LinkedBlockingDeque<E> this, E e) {
         if (!offerLast(e))
             throw new IllegalStateException("Deque full");
     }
@@ -363,7 +364,7 @@ public void addLast(@Growable LinkedBlockingDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
+    public boolean offerFirst(@SeqGrowable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -380,7 +381,7 @@ public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
+    public boolean offerLast(@SeqGrowable LinkedBlockingDeque<E> this, E e) {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -398,7 +399,7 @@ public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
+    public void putFirst(@SeqGrowable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -417,7 +418,7 @@ public void putFirst(@Growable LinkedBlockingDeque<E> this, E e) throws Interrup
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
+    public void putLast(@SeqGrowable LinkedBlockingDeque<E> this, E e) throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         final ReentrantLock lock = this.lock;
@@ -436,7 +437,7 @@ public void putLast(@Growable LinkedBlockingDeque<E> this, E e) throws Interrupt
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
+    public boolean offerFirst(@SeqGrowable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         long nanos = unit.toNanos(timeout);
@@ -460,7 +461,7 @@ public boolean offerFirst(@Growable LinkedBlockingDeque<E> this, E e, long timeo
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public boolean offerLast(@Growable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
+    public boolean offerLast(@SeqGrowable LinkedBlockingDeque<E> this, E e, long timeout, TimeUnit unit)        throws InterruptedException {
         if (e == null) throw new NullPointerException();
         Node<E> node = new Node<E>(e);
         long nanos = unit.toNanos(timeout);
@@ -846,7 +847,7 @@ public int drainTo(@Shrinkable @GuardSatisfied @CanShrink LinkedBlockingDeque<E>
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void push(@Growable LinkedBlockingDeque<E> this, E e) {
+    public void push(@SeqGrowable LinkedBlockingDeque<E> this, E e) {
         addFirst(e);
     }
 

From 6c78df04178bedc06337bcdd0adcfe81465941d7 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 1 Jun 2026 14:19:47 -0700
Subject: [PATCH 103/119] annotated addFirst addLast in TreeSet and
 ConcurrentSkipListSet.

---
 src/java.base/share/classes/java/util/TreeSet.java           | 5 +++--
 .../classes/java/util/concurrent/ConcurrentSkipListSet.java  | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index d9784f533b62..5bc8b3b2289b 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
@@ -538,7 +539,7 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    public void addFirst(E e) {
+    public void addFirst(@SeqGrowable TreeSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -554,7 +555,7 @@ public void addFirst(E e) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    public void addLast(E e) {
+    public void addLast(@SeqGrowable TreeSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 3d04502dac72..1e39664685f3 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -41,6 +41,7 @@
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
@@ -467,7 +468,7 @@ public E last(@NonEmpty ConcurrentSkipListSet<E> this) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addFirst(E e) {
+    public void addFirst(@SeqGrowable ConcurrentSkipListSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 
@@ -483,7 +484,7 @@ public void addFirst(E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public void addLast(E e) {
+    public void addLast(@SeqGrowable ConcurrentSkipListSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
 

From 5015093e694f0f9ba272fec6e19e69e6a580d531 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 1 Jun 2026 15:01:58 -0700
Subject: [PATCH 104/119] update checker qual

---
 checker-qual.jar                              | Bin 292495 -> 295543 bytes
 .../modifiability/qual/BottomSeqGrowable.java |  21 ++++++++++++++
 .../modifiability/qual/MaybeSeqGrowable.java  |  26 ++++++++++++++++++
 .../modifiability/qual/Modifiable.java        |   8 +++---
 .../modifiability/qual/PolyModifiable.java    |   5 ++--
 .../modifiability/qual/PolySeqGrowable.java   |  20 ++++++++++++++
 .../modifiability/qual/SeqGrowable.java       |  23 ++++++++++++++++
 .../modifiability/qual/SeqUngrowable.java     |  23 ++++++++++++++++
 8 files changed, 120 insertions(+), 6 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomSeqGrowable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolySeqGrowable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java

diff --git a/checker-qual.jar b/checker-qual.jar
index 1860c4b7e246d64531c204307d7690e6132758c1..0608bc8a10e7c1cced15971f9d33a111408de6c8 100644
GIT binary patch
delta 8776
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QFw;&-NsTy-f4!9YALk;tQvd(}

diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomSeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomSeqGrowable.java
new file mode 100644
index 000000000000..4c7f8a15713f
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/BottomSeqGrowable.java
@@ -0,0 +1,21 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The bottom qualifier in the sequenced-grow hierarchy.
+ *
+ * <p>Programmers should rarely write this qualifier.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({SeqGrowable.class, SeqUngrowable.class})
+public @interface BottomSeqGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
new file mode 100644
index 000000000000..edc800772346
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
@@ -0,0 +1,26 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.DefaultQualifierInHierarchy;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * The top qualifier in the sequenced-grow hierarchy. The collection may or may not support
+ * positional grow operations such as {@code addFirst} and {@code addLast}. The checker
+ * conservatively issues an error wherever a sequenced-grow operation is called on a
+ * {@code @MaybeSeqGrowable} expression.
+ *
+ * <p>This is the default qualifier for unannotated types in the sequenced-grow hierarchy.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf({})
+@DefaultQualifierInHierarchy
+public @interface MaybeSeqGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
index 6ea06c0065be..978239c8b045 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Modifiable.java
@@ -7,13 +7,13 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias usually meaning {@code @Growable @Shrinkable @Replaceable}. Calling a mutating
- * operation (growing, shrinking, or replacing) on this collection will not throw {@link
- * UnsupportedOperationException}.
+ * Convenience alias usually meaning {@code @Growable @Shrinkable @Replaceable @SeqGrowable}.
+ * Calling a mutating operation (growing, shrinking, replacing, or sequenced-growing) on this
+ * collection will not throw {@link UnsupportedOperationException}.
  *
  * <p>As an exception, {@code @Modifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Modifiable Iterator} means
- * {@code @MaybeGrowable @Shrinkable @MaybeReplaceable Iterator}.
+ * {@code @MaybeGrowable @Shrinkable @MaybeReplaceable @MaybeSeqGrowable Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 5176b1123f9d..83724f7d4be5 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -4,8 +4,9 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @PolyGrowable @PolyReplaceable @PolyShrinkable}. A polymorphic
- * qualifier for all three modifiability hierarchies.
+ * Convenience alias meaning
+ * {@code @PolyGrowable @PolyReplaceable @PolyShrinkable @PolySeqGrowable}. A polymorphic qualifier
+ * for all four modifiability hierarchies.
  *
  * <p>Write {@code @PolyModifiable} on methods that preserve or transfer modifiability, such as
  * {@code List.subList()} and {@code stream()}.
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolySeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolySeqGrowable.java
new file mode 100644
index 000000000000..5edd895d7900
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolySeqGrowable.java
@@ -0,0 +1,20 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.PolymorphicQualifier;
+
+/**
+ * A polymorphic qualifier for the sequenced-grow hierarchy.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@PolymorphicQualifier(MaybeSeqGrowable.class)
+public @interface PolySeqGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
new file mode 100644
index 000000000000..ce329fe46e61
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling sequenced-grow operations such as {@code addFirst}, {@code addLast}, {@code offerFirst},
+ * {@code offerLast}, and {@code push} on this collection will not throw {@link
+ * UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about ordinary grow, shrink, or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(MaybeSeqGrowable.class)
+public @interface SeqGrowable {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java
new file mode 100644
index 000000000000..26c67f1cfeb8
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java
@@ -0,0 +1,23 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.SubtypeOf;
+
+/**
+ * Calling sequenced-grow operations such as {@code addFirst}, {@code addLast}, {@code offerFirst},
+ * {@code offerLast}, and {@code push} on this collection will throw {@link
+ * UnsupportedOperationException}.
+ *
+ * <p>No guarantees are made about ordinary grow, shrink, or replace operations.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@SubtypeOf(MaybeSeqGrowable.class)
+public @interface SeqUngrowable {}

From 4c2825bbabf9311e7042513fc8a7a775f5fc730a Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 1 Jun 2026 15:35:48 -0700
Subject: [PATCH 105/119] fixed typo in treeSet annotation

---
 src/java.base/share/classes/java/util/TreeSet.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 5bc8b3b2289b..870f6fcbecbd 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -133,7 +133,7 @@
     /**
      * Constructs a set backed by the specified navigable map.
      */
-    @Modifiable @IteratorPolyMod TreeSet(NavigableMap<E,Object> m) {
+    @Growable @Shrinkable @Replaceable @SeqUngrowable @IteratorPolyMod TreeSet(NavigableMap<E,Object> m) {
         this.m = m;
     }
 

From 6fb270e9605566f80fe55c79f6a0ec869460eae2 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 1 Jun 2026 22:08:14 -0700
Subject: [PATCH 106/119] annotated @SeqGrow in jdk.

---
 .../classes/java/util/LinkedHashMap.java      |  9 ++++---
 .../java/util/ReverseOrderSortedMapView.java  |  5 ++--
 .../share/classes/java/util/SequencedMap.java |  7 +++--
 .../share/classes/java/util/SortedMap.java    |  9 ++++---
 .../share/classes/java/util/TreeMap.java      | 27 ++++++++++---------
 .../concurrent/ConcurrentSkipListMap.java     | 23 ++++++++--------
 6 files changed, 42 insertions(+), 38 deletions(-)

diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 443bcefe7b22..f46bab271545 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -33,6 +33,7 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -417,7 +418,7 @@ void afterNodeAccess(Node<K,V> e) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
+    public V putFirst(@SeqGrowable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_FIRST;
             return this.put(k, v);
@@ -436,7 +437,7 @@ public V putFirst(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public V putLast(@Growable @Replaceable LinkedHashMap<K,V> this, K k, V v) {
+    public V putLast(@SeqGrowable LinkedHashMap<K,V> this, K k, V v) {
         try {
             putMode = PUT_LAST;
             return this.put(k, v);
@@ -1388,13 +1389,13 @@ public Entry<K, V> pollLastEntry(@Shrinkable ReversedLinkedHashMapView<K,V> this
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putFirst(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
+        public V putFirst(@SeqGrowable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putLast(k, v);
         }
 
         // @SideEffectsOnly("this")
         @DoesNotUnrefineReceiver("modifiability")
-        public V putLast(@Growable @Replaceable ReversedLinkedHashMapView<K,V> this, K k, V v) {
+        public V putLast(@SeqGrowable ReversedLinkedHashMapView<K,V> this, K k, V v) {
             return base.putFirst(k, v);
         }
     }
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index c7cf58a7393f..992a6a614bc0 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -30,6 +30,7 @@
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.Pure;
@@ -189,11 +190,11 @@ public Map.Entry<K,V> pollLastEntry(@Shrinkable ReverseOrderSortedMapView<K,V> t
         return base.pollFirstEntry();
     }
 
-    public V putFirst(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, K k, V v) {
+    public V putFirst(@SeqGrowable ReverseOrderSortedMapView<K,V> this, K k, V v) {
         return base.putLast(k, v);
     }
 
-    public V putLast(@Growable @Replaceable ReverseOrderSortedMapView<K,V> this, K k, V v) {
+    public V putLast(@SeqGrowable ReverseOrderSortedMapView<K,V> this, K k, V v) {
         return base.putFirst(k, v);
     }
 
diff --git a/src/java.base/share/classes/java/util/SequencedMap.java b/src/java.base/share/classes/java/util/SequencedMap.java
index a584cc370b09..031cf21899bc 100644
--- a/src/java.base/share/classes/java/util/SequencedMap.java
+++ b/src/java.base/share/classes/java/util/SequencedMap.java
@@ -25,10 +25,9 @@
 
 package java.util;
 
-import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
-import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.dataflow.qual.Pure;
@@ -255,7 +254,7 @@ default Map.Entry<K,V> pollLastEntry(@Shrinkable SequencedMap<K,V> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+    default V putFirst(@SeqGrowable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -276,7 +275,7 @@ default V putFirst(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    default V putLast(@Growable @Replaceable SequencedMap<K,V> this, K k, V v) {
+    default V putLast(@SeqGrowable SequencedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 5a7c0460749d..31593c202581 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -27,9 +27,10 @@
 
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -128,7 +129,7 @@
 
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public interface SortedMap<K,V> extends SequencedMap<K,V> {
+public @SeqUngrowable interface SortedMap<K,V> extends SequencedMap<K,V> {
     /**
      * Returns the comparator used to order the keys in this map, or
      * {@code null} if this map uses the {@linkplain Comparable
@@ -323,7 +324,7 @@ public interface SortedMap<K,V> extends SequencedMap<K,V> {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-     default V putFirst(K k, V v) {
+     default V putFirst(@SeqGrowable SortedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -341,7 +342,7 @@ default V putFirst(K k, V v) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    default V putLast(K k, V v) {
+    default V putLast(@SeqGrowable SortedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 7a81625ea84a..8b86508d9fe9 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -29,10 +29,11 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -149,7 +150,7 @@
 
 @CFComment({"lock/nullness: This permits null element when using a custom comparator that allows null"})
 @AnnotatedFor({"lock", "nullness", "index", "modifiability"})
-public class TreeMap<K,V>
+public @SeqUngrowable class TreeMap<K,V>
     extends AbstractMap<K,V>
     implements NavigableMap<K,V>, Cloneable, java.io.Serializable
 {
@@ -186,7 +187,7 @@ public class TreeMap<K,V>
      * {@code put(Object key, Object value)} call will throw a
      * {@code ClassCastException}.
      */
-    public @Modifiable TreeMap() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable TreeMap() {
         comparator = null;
     }
 
@@ -204,7 +205,7 @@ public class TreeMap<K,V>
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public @Modifiable TreeMap(@Nullable Comparator<? super K> comparator) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable TreeMap(@Nullable Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -222,7 +223,7 @@ public class TreeMap<K,V>
      *         or are not mutually comparable
      * @throws NullPointerException if the specified map is null
      */
-    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @PolyNonEmpty TreeMap(@PolyNonEmpty Map<? extends K, ? extends V> m) {
         comparator = null;
         putAll(m);
     }
@@ -236,7 +237,7 @@ public class TreeMap<K,V>
      *         and whose comparator is to be used to sort this map
      * @throws NullPointerException if the specified map is null
      */
-    public @Modifiable @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable @PolyNonEmpty TreeMap(@PolyNonEmpty SortedMap<K, ? extends V> m) {
         comparator = m.comparator();
         try {
             buildFromSorted(m.size(), m.entrySet().iterator(), null, null);
@@ -357,7 +358,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    public V putFirst(K k, V v) {
+    public V putFirst(@SeqGrowable TreeMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -372,7 +373,7 @@ public V putFirst(K k, V v) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    public V putLast(K k, V v) {
+    public V putLast(@SeqGrowable TreeMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -729,7 +730,7 @@ public V computeIfPresent(@Shrinkable @Replaceable TreeMap<K,V> this, K key, BiF
      */
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public V compute(@Modifiable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+    public V compute(@Growable @Shrinkable @Replaceable TreeMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         V newValue;
         Entry<K,V> t = root;
@@ -792,7 +793,7 @@ else if (cmp > 0)
      */
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    public V merge(@Modifiable TreeMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+    public V merge(@Growable @Shrinkable @Replaceable TreeMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
         Objects.requireNonNull(remappingFunction);
         Objects.requireNonNull(value);
         Entry<K,V> t = root;
@@ -997,7 +998,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      * @return a shallow copy of this map
      */
     @SideEffectFree
-    public @Modifiable Object clone(@GuardSatisfied TreeMap<K, V> this) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable Object clone(@GuardSatisfied TreeMap<K, V> this) {
         TreeMap<?,?> clone;
         try {
             clone = (TreeMap<?,?>) super.clone();
@@ -1995,7 +1996,7 @@ public V putIfAbsent(@Growable NavigableSubMap<K,V> this, K key, V value) {
         }
 
         @DoesNotUnrefineReceiver("modifiability")
-        public V merge(@Modifiable NavigableSubMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
+        public V merge(@Growable @Shrinkable @Replaceable NavigableSubMap<K,V> this, K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
             if (!inRange(key))
                 throw new IllegalArgumentException("key out of range");
             return m.merge(key, value, remappingFunction);
@@ -2013,7 +2014,7 @@ public V computeIfAbsent(@Growable NavigableSubMap<K,V> this, K key, Function<?
         }
 
         @DoesNotUnrefineReceiver("modifiability")
-        public V compute(@Modifiable NavigableSubMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
+        public V compute(@Growable @Shrinkable @Replaceable NavigableSubMap<K,V> this, K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
             if (!inRange(key)) {
                 // Do not throw if remapping function returns null
                 // to preserve compatibility with default computeIfAbsent implementation
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 424905b57961..bbc27e5cd0b0 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -38,10 +38,11 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
-import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.SeqGrowable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
@@ -134,7 +135,7 @@
  * @since 1.6
  */
 @AnnotatedFor({"nullness", "modifiability"})
-public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
+public @SeqUngrowable class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
     implements ConcurrentNavigableMap<K,V>, Cloneable, Serializable {
     /*
      * This class implements a tree-like two-dimensionally linked skip
@@ -1094,7 +1095,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      * Constructs a new, empty map, sorted according to the
      * {@linkplain Comparable natural ordering} of the keys.
      */
-    public @Modifiable ConcurrentSkipListMap() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable ConcurrentSkipListMap() {
         this.comparator = null;
     }
 
@@ -1106,7 +1107,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      *        If {@code null}, the {@linkplain Comparable natural
      *        ordering} of the keys will be used.
      */
-    public @Modifiable ConcurrentSkipListMap(Comparator<? super K> comparator) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable ConcurrentSkipListMap(Comparator<? super K> comparator) {
         this.comparator = comparator;
     }
 
@@ -1121,7 +1122,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      * @throws NullPointerException if the specified map or any of its keys
      *         or values are null
      */
-    public @Modifiable ConcurrentSkipListMap(Map<? extends K, ? extends V> m) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable ConcurrentSkipListMap(Map<? extends K, ? extends V> m) {
         this.comparator = null;
         putAll(m);
     }
@@ -1135,7 +1136,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      * @throws NullPointerException if the specified sorted map or any of
      *         its keys or values are null
      */
-    public @Modifiable ConcurrentSkipListMap(SortedMap<K, ? extends V> m) {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable ConcurrentSkipListMap(SortedMap<K, ? extends V> m) {
         this.comparator = m.comparator();
         buildFromSorted(m); // initializes transients
     }
@@ -1147,7 +1148,7 @@ final AbstractMap.SimpleImmutableEntry<K,V> findNearEntry(K key, int rel,
      * @return a shallow copy of this map
      */
     @SideEffectFree
-    public @Modifiable ConcurrentSkipListMap<K,V> clone() {
+    public @Growable @Shrinkable @Replaceable @SeqUngrowable ConcurrentSkipListMap<K,V> clone() {
         try {
             @SuppressWarnings("unchecked")
             ConcurrentSkipListMap<K,V> clone =
@@ -1551,7 +1552,7 @@ else if (doRemove(key, v) != null)
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public @PolyNull V compute(@Modifiable ConcurrentSkipListMap<K,V> this, K key,
+    public @PolyNull V compute(@Growable @Shrinkable @Replaceable ConcurrentSkipListMap<K,V> this, K key,
                      BiFunction<? super K, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1591,7 +1592,7 @@ else if (doRemove(key, v) != null)
      * @since 1.8
      */
     @DoesNotUnrefineReceiver("modifiability")
-    public @PolyNull V merge(@Modifiable ConcurrentSkipListMap<K,V> this, K key, @NonNull V value,
+    public @PolyNull V merge(@Growable @Shrinkable @Replaceable ConcurrentSkipListMap<K,V> this, K key, @NonNull V value,
                    BiFunction<? super V, ? super V, ? extends @PolyNull V> remappingFunction) {
         if (key == null || value == null || remappingFunction == null)
             throw new NullPointerException();
@@ -1943,7 +1944,7 @@ public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-     public V putFirst(K k, V v) {
+     public V putFirst(@SeqGrowable ConcurrentSkipListMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 
@@ -1958,7 +1959,7 @@ public V putFirst(K k, V v) {
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     @ThrowsUOE
-    public V putLast(K k, V v) {
+    public V putLast(@SeqGrowable ConcurrentSkipListMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
 

From 6de9e0b5a8cea19d627554302f9c0cd68fdca4ba Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 3 Jun 2026 12:21:59 -0700
Subject: [PATCH 107/119] annotate NagivableSet as @SeqUngrowable

---
 src/java.base/share/classes/java/util/NavigableSet.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index e35ceacea9c7..3bb2a7e1cf87 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.index.qual.PolyGrowShrink;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
+import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nonempty.qual.PolyNonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -101,7 +102,7 @@
  */
 @CFComment({"lock/nullness: Subclasses of this interface/class may opt to prohibit null elements"})
 @AnnotatedFor({"lock", "nullness"})
-public interface NavigableSet<E> extends SortedSet<E> {
+public @SeqUngrowable interface NavigableSet<E> extends SortedSet<E> {
     /**
      * Returns the greatest element in this set strictly less than the
      * given element, or {@code null} if there is no such element.

From 403aa9c8aa334fc9367e4b80f95da104c87d16e2 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Wed, 3 Jun 2026 13:17:04 -0700
Subject: [PATCH 108/119] remove throwsUOE and rebuild checker jar.

---
 checker-qual.jar                              | Bin 295543 -> 295051 bytes
 .../classes/java/util/AbstractCollection.java |   1 -
 .../share/classes/java/util/SortedMap.java    |   3 ---
 .../share/classes/java/util/SortedSet.java    |   3 ---
 .../share/classes/java/util/TreeMap.java      |   3 ---
 .../share/classes/java/util/TreeSet.java      |   3 ---
 .../concurrent/ConcurrentSkipListMap.java     |   3 ---
 .../concurrent/ConcurrentSkipListSet.java     |   3 ---
 .../formatter/qual/ConversionCategory.java    |  19 ++++++++++--------
 .../checker/formatter/qual/FormatBottom.java  |   2 +-
 .../qual/I18nConversionCategory.java          |   6 ++----
 .../i18nformatter/qual/I18nFormatBottom.java  |   2 +-
 .../interning/qual/InternedDistinct.java      |   2 +-
 .../modifiability/qual/IteratorPolyMod.java   |   2 +-
 .../modifiability/qual/MaybeSeqGrowable.java  |   8 ++++----
 .../modifiability/qual/SeqGrowable.java       |   4 ++--
 .../modifiability/qual/SeqUngrowable.java     |   4 ++--
 .../checker/modifiability/qual/ThrowsUOE.java |  17 ----------------
 .../checker/regex/qual/RegexBottom.java       |   2 +-
 .../sqlquotes/qual/SqlQuotesBottom.java       |   2 +-
 .../returnsreceiver/qual/UnknownThis.java     |   2 +-
 21 files changed, 28 insertions(+), 63 deletions(-)
 delete mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java

diff --git a/checker-qual.jar b/checker-qual.jar
index 0608bc8a10e7c1cced15971f9d33a111408de6c8..f092820db78cf011f728166dc7155ea511a0a7b3 100644
GIT binary patch
delta 17828
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diff --git a/src/java.base/share/classes/java/util/AbstractCollection.java b/src/java.base/share/classes/java/util/AbstractCollection.java
index 0c7375469f9f..bdc7b2dea67c 100644
--- a/src/java.base/share/classes/java/util/AbstractCollection.java
+++ b/src/java.base/share/classes/java/util/AbstractCollection.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index 31593c202581..b389fc67377d 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -31,7 +31,6 @@
 import org.checkerframework.checker.modifiability.qual.PolyShrinkable;
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.KeyFor;
@@ -323,7 +322,6 @@
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
      default V putFirst(@SeqGrowable SortedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -341,7 +339,6 @@ default V putFirst(@SeqGrowable SortedMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     default V putLast(@SeqGrowable SortedMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/SortedSet.java b/src/java.base/share/classes/java/util/SortedSet.java
index 5478da47d74b..f217c93635d2 100644
--- a/src/java.base/share/classes/java/util/SortedSet.java
+++ b/src/java.base/share/classes/java/util/SortedSet.java
@@ -30,7 +30,6 @@
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -303,7 +302,6 @@ public Comparator<? super E> getComparator() {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     default void addFirst(@SeqGrowable SortedSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
@@ -322,7 +320,6 @@ default void addFirst(@SeqGrowable SortedSet<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     default void addLast(@SeqGrowable SortedSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index 8b86508d9fe9..e7872f47ad7d 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -357,7 +356,6 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     public V putFirst(@SeqGrowable TreeMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -372,7 +370,6 @@ public V putFirst(@SeqGrowable TreeMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     public V putLast(@SeqGrowable TreeMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/TreeSet.java b/src/java.base/share/classes/java/util/TreeSet.java
index 870f6fcbecbd..f7bf01598134 100644
--- a/src/java.base/share/classes/java/util/TreeSet.java
+++ b/src/java.base/share/classes/java/util/TreeSet.java
@@ -35,7 +35,6 @@
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -538,7 +537,6 @@ public E last(@GuardSatisfied @NonEmpty TreeSet<E> this) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     public void addFirst(@SeqGrowable TreeSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
@@ -554,7 +552,6 @@ public void addFirst(@SeqGrowable TreeSet<E> this, E e) {
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     public void addLast(@SeqGrowable TreeSet<E> this, E e) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index bbc27e5cd0b0..ea10c35aae08 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -44,7 +44,6 @@
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.modifiability.qual.Unmodifiable;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -1943,7 +1942,6 @@ public K lastKey(@NonEmpty ConcurrentSkipListMap<K,V> this) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
      public V putFirst(@SeqGrowable ConcurrentSkipListMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
@@ -1958,7 +1956,6 @@ public V putFirst(@SeqGrowable ConcurrentSkipListMap<K,V> this, K k, V v) {
      */
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    @ThrowsUOE
     public V putLast(@SeqGrowable ConcurrentSkipListMap<K,V> this, K k, V v) {
         throw new UnsupportedOperationException();
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
index 1e39664685f3..58a77ea8ec17 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListSet.java
@@ -44,7 +44,6 @@
 import org.checkerframework.checker.modifiability.qual.SeqGrowable;
 import org.checkerframework.checker.modifiability.qual.SeqUngrowable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
-import org.checkerframework.checker.modifiability.qual.ThrowsUOE;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmpty;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
 import org.checkerframework.checker.nonempty.qual.NonEmpty;
@@ -464,7 +463,6 @@ public E last(@NonEmpty ConcurrentSkipListSet<E> this) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @ThrowsUOE
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
@@ -480,7 +478,6 @@ public void addFirst(@SeqGrowable ConcurrentSkipListSet<E> this, E e) {
      * @throws UnsupportedOperationException always
      * @since 21
      */
-    @ThrowsUOE
     @EnsuresNonEmpty("this")
     // @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
diff --git a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
index 2a3dbd7c899a..0dabb92c2d23 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
@@ -187,8 +187,9 @@ public enum ConversionCategory {
    * The conversion categories that have a corresponding conversion character. This lacks UNUSED,
    * TIME_AND_INT, etc.
    */
-  private static final ConversionCategory[] conversionCategoriesWithChar =
-      new ConversionCategory[] {GENERAL, CHAR, INT, FLOAT, TIME};
+  private static final ConversionCategory[] conversionCategoriesWithChar = {
+    GENERAL, CHAR, INT, FLOAT, TIME
+  };
 
   /**
    * Converts a conversion character to a category. For example:
@@ -219,8 +220,9 @@ public static boolean isSubsetOf(ConversionCategory a, ConversionCategory b) {
   }
 
   /** Conversion categories that need to be considered by {@link #intersect}. */
-  private static final ConversionCategory[] conversionCategoriesForIntersect =
-      new ConversionCategory[] {CHAR, INT, FLOAT, TIME, CHAR_AND_INT, INT_AND_TIME, NULL};
+  private static final ConversionCategory[] conversionCategoriesForIntersect = {
+    CHAR, INT, FLOAT, TIME, CHAR_AND_INT, INT_AND_TIME, NULL
+  };
 
   /**
    * Returns the intersection of two categories. This is seldom needed.
@@ -270,8 +272,9 @@ public static ConversionCategory intersect(ConversionCategory a, ConversionCateg
   }
 
   /** Conversion categories that need to be considered by {@link #union}. */
-  private static final ConversionCategory[] conversionCategoriesForUnion =
-      new ConversionCategory[] {NULL, CHAR_AND_INT, INT_AND_TIME, CHAR, INT, FLOAT, TIME};
+  private static final ConversionCategory[] conversionCategoriesForUnion = {
+    NULL, CHAR_AND_INT, INT_AND_TIME, CHAR, INT, FLOAT, TIME
+  };
 
   /**
    * Returns the union of two categories. This is seldom needed.
@@ -346,7 +349,7 @@ public boolean isAssignableFrom(Class<?> argType) {
   @Pure
   @Override
   public String toString() {
-    StringBuilder sb = new StringBuilder();
+    StringBuilder sb = new StringBuilder(32);
     sb.append(name());
     sb.append(" conversion category");
 
@@ -358,7 +361,7 @@ public String toString() {
     for (Class<?> cls : types) {
       sj.add(cls.getSimpleName());
     }
-    sb.append(" ");
+    sb.append(' ');
     sb.append(sj);
 
     return sb.toString();
diff --git a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/FormatBottom.java b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/FormatBottom.java
index 9ce0ec040f52..87263ecb9b04 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/FormatBottom.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/FormatBottom.java
@@ -21,5 +21,5 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND})
 @SubtypeOf({Format.class, InvalidFormat.class})
-@DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
+@DefaultFor({TypeUseLocation.LOWER_BOUND})
 public @interface FormatBottom {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
index 0438bbfdf3cc..02da76a4c901 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
@@ -64,8 +64,7 @@ public enum I18nConversionCategory {
   }
 
   /** Used by {@link #stringToI18nConversionCategory}. */
-  private static final I18nConversionCategory[] namedCategories =
-      new I18nConversionCategory[] {DATE, NUMBER};
+  private static final I18nConversionCategory[] namedCategories = {DATE, NUMBER};
 
   /**
    * Creates a conversion cagetogry from a string name.
@@ -104,8 +103,7 @@ public static boolean isSubsetOf(I18nConversionCategory a, I18nConversionCategor
   }
 
   /** Conversion categories that need to be considered by {@link #intersect}. */
-  private static final I18nConversionCategory[] conversionCategoriesForIntersect =
-      new I18nConversionCategory[] {DATE, NUMBER};
+  private static final I18nConversionCategory[] conversionCategoriesForIntersect = {DATE, NUMBER};
 
   /**
    * Returns the intersection of the two given I18nConversionCategories.
diff --git a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nFormatBottom.java b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nFormatBottom.java
index 44637a30b819..941f4e61d7cd 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nFormatBottom.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nFormatBottom.java
@@ -22,5 +22,5 @@
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND})
 @SubtypeOf({I18nFormat.class, I18nInvalidFormat.class, I18nFormatFor.class})
-@DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
+@DefaultFor({TypeUseLocation.LOWER_BOUND})
 public @interface I18nFormatBottom {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/interning/qual/InternedDistinct.java b/src/java.base/share/classes/org/checkerframework/checker/interning/qual/InternedDistinct.java
index c1e7fb54a8cb..80b80e37cfaf 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/interning/qual/InternedDistinct.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/interning/qual/InternedDistinct.java
@@ -25,5 +25,5 @@
 @Retention(RetentionPolicy.RUNTIME)
 @Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
 @SubtypeOf(Interned.class)
-@DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
+@DefaultFor({TypeUseLocation.LOWER_BOUND})
 public @interface InternedDistinct {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
index ec4c8d2b8de1..eab5c7afc93e 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -9,7 +9,7 @@
 
 /**
  * If a collection's type is {@code @IteratorPolyMod}, then its {@code iterator()} and {@code
- * listIterator()} methods preserves the ability to call modification methods in its iterator.
+ * listIterator()} methods preserve the ability to call modification methods in its iterator.
  *
  * <p>For example, if collection {@code c} has type {@code @Shrinkable}, then {@code c.iterator()}
  * also has type {@code @Shrinkable}. If list {@code l} has type {@code @Replaceable}, then {@code
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
index edc800772346..27e7feb3dc8c 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeSeqGrowable.java
@@ -9,10 +9,10 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * The top qualifier in the sequenced-grow hierarchy. The collection may or may not support
- * positional grow operations such as {@code addFirst} and {@code addLast}. The checker
- * conservatively issues an error wherever a sequenced-grow operation is called on a
- * {@code @MaybeSeqGrowable} expression.
+ * The top qualifier in the sequenced-grow hierarchy. The collection or map may or may not support
+ * positional operations such as {@code addFirst}, {@code addLast}, {@code putFirst}, and {@code
+ * putLast}. The checker conservatively issues an error wherever a sequenced-grow operation is
+ * called on a {@code @MaybeSeqGrowable} expression.
  *
  * <p>This is the default qualifier for unannotated types in the sequenced-grow hierarchy.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
index ce329fe46e61..3714fe5909d9 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqGrowable.java
@@ -9,8 +9,8 @@
 
 /**
  * Calling sequenced-grow operations such as {@code addFirst}, {@code addLast}, {@code offerFirst},
- * {@code offerLast}, and {@code push} on this collection will not throw {@link
- * UnsupportedOperationException}.
+ * {@code offerLast}, {@code push}, {@code putFirst}, and {@code putLast} on this collection or map
+ * will not throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about ordinary grow, shrink, or replace operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java
index 26c67f1cfeb8..ff6c4008ed1f 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/SeqUngrowable.java
@@ -9,8 +9,8 @@
 
 /**
  * Calling sequenced-grow operations such as {@code addFirst}, {@code addLast}, {@code offerFirst},
- * {@code offerLast}, and {@code push} on this collection will throw {@link
- * UnsupportedOperationException}.
+ * {@code offerLast}, {@code push}, {@code putFirst}, and {@code putLast} on this collection or map
+ * will throw {@link UnsupportedOperationException}.
  *
  * <p>No guarantees are made about ordinary grow, shrink, or replace operations.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
deleted file mode 100644
index 1275077f2023..000000000000
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/ThrowsUOE.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package org.checkerframework.checker.modifiability.qual;
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-/**
- * The annotated method always throws {@link UnsupportedOperationException} when called.
- *
- * @checker_framework.manual #modifiability-checker Modifiability Checker
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-@Target({ElementType.METHOD, ElementType.CONSTRUCTOR})
-public @interface ThrowsUOE {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
index 2ffcb62ad718..b948170765bd 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/regex/qual/RegexBottom.java
@@ -23,5 +23,5 @@
 @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND})
 @InvisibleQualifier
 @SubtypeOf({Regex.class, PartialRegex.class})
-@DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
+@DefaultFor({TypeUseLocation.LOWER_BOUND})
 public @interface RegexBottom {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/sqlquotes/qual/SqlQuotesBottom.java b/src/java.base/share/classes/org/checkerframework/checker/sqlquotes/qual/SqlQuotesBottom.java
index 41acaca1641d..542f2a288119 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/sqlquotes/qual/SqlQuotesBottom.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/sqlquotes/qual/SqlQuotesBottom.java
@@ -23,5 +23,5 @@
 @TargetLocations({TypeUseLocation.EXPLICIT_LOWER_BOUND, TypeUseLocation.EXPLICIT_UPPER_BOUND})
 @InvisibleQualifier
 @SubtypeOf({SqlEvenQuotes.class, SqlOddQuotes.class})
-@DefaultFor(value = {TypeUseLocation.LOWER_BOUND})
+@DefaultFor({TypeUseLocation.LOWER_BOUND})
 public @interface SqlQuotesBottom {}
diff --git a/src/java.base/share/classes/org/checkerframework/common/returnsreceiver/qual/UnknownThis.java b/src/java.base/share/classes/org/checkerframework/common/returnsreceiver/qual/UnknownThis.java
index 7ada21419f1e..70b38d5de7c1 100644
--- a/src/java.base/share/classes/org/checkerframework/common/returnsreceiver/qual/UnknownThis.java
+++ b/src/java.base/share/classes/org/checkerframework/common/returnsreceiver/qual/UnknownThis.java
@@ -23,6 +23,6 @@
 @SubtypeOf({})
 @DefaultQualifierInHierarchy
 @QualifierForLiterals(LiteralKind.NULL)
-@DefaultFor(value = TypeUseLocation.LOWER_BOUND)
+@DefaultFor(TypeUseLocation.LOWER_BOUND)
 @InvisibleQualifier
 public @interface UnknownThis {}

From 39c4232163878058bf17ac63918783a5c59e0f60 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Fri, 5 Jun 2026 17:51:20 -0700
Subject: [PATCH 109/119] annotating @PolyIteratorPolyMod

Co-authored-by: Copilot <copilot@github.com>
---
 .../share/classes/java/util/Collections.java  | 51 +++++++++++++++----
 1 file changed, 42 insertions(+), 9 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 829c25147996..738be6638914 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -31,6 +31,7 @@
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
+import org.checkerframework.checker.modifiability.qual.PolyIteratorPolyMod;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.modifiability.qual.PolyModifiable;
@@ -64,6 +65,38 @@
 import java.io.ObjectOutputStream;
 import java.io.Serializable;
 import java.lang.reflect.Array;
+import java.util.AbstractMap.SimpleImmutableEntry;
+import java.util.Collections.AsLIFOQueue;
+import java.util.Collections.CheckedCollection;
+import java.util.Collections.CheckedList;
+import java.util.Collections.CheckedMap.CheckedEntrySet;
+import java.util.Collections.CheckedNavigableMap;
+import java.util.Collections.CheckedNavigableSet;
+import java.util.Collections.CheckedQueue;
+import java.util.Collections.CheckedRandomAccessList;
+import java.util.Collections.CheckedSet;
+import java.util.Collections.CheckedSortedMap;
+import java.util.Collections.CheckedSortedSet;
+import java.util.Collections.SynchronizedCollection;
+import java.util.Collections.SynchronizedList;
+import java.util.Collections.SynchronizedNavigableMap;
+import java.util.Collections.SynchronizedNavigableSet;
+import java.util.Collections.SynchronizedRandomAccessList;
+import java.util.Collections.SynchronizedSet;
+import java.util.Collections.SynchronizedSortedMap;
+import java.util.Collections.SynchronizedSortedSet;
+import java.util.Collections.UnmodifiableCollection;
+import java.util.Collections.UnmodifiableList;
+import java.util.Collections.UnmodifiableMap.UnmodifiableEntrySet;
+import java.util.Collections.UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableEntrySetSpliterator;
+import java.util.Collections.UnmodifiableNavigableMap;
+import java.util.Collections.UnmodifiableNavigableSet;
+import java.util.Collections.UnmodifiableRandomAccessList;
+import java.util.Collections.UnmodifiableSequencedCollection;
+import java.util.Collections.UnmodifiableSequencedSet;
+import java.util.Collections.UnmodifiableSet;
+import java.util.Collections.UnmodifiableSortedMap;
+import java.util.Collections.UnmodifiableSortedSet;
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
@@ -2526,11 +2559,11 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive)
      * @param  c the collection to be "wrapped" in a synchronized collection.
      * @return a synchronized view of the specified collection.
      */
-    public static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> c) {
+    public static <T> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<T> c) {
         return new SynchronizedCollection<>(c);
     }
 
-    static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<T> c, Object mutex) {
+    static <T> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<T> synchronizedCollection(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<T> c, Object mutex) {
         return new SynchronizedCollection<>(c, mutex);
     }
 
@@ -2683,11 +2716,11 @@ private void writeObject(ObjectOutputStream s) throws IOException {
      * @param  s the set to be "wrapped" in a synchronized set.
      * @return a synchronized view of the specified set.
      */
-    public static <T> @PolyModifiable Set<T> synchronizedSet(@PolyModifiable Set<T> s) {
+    public static <T> @PolyModifiable @PolyIteratorPolyMod Set<T> synchronizedSet(@PolyModifiable @PolyIteratorPolyMod Set<T> s) {
         return new SynchronizedSet<>(s);
     }
 
-    static <T> @PolyModifiable Set<T> synchronizedSet(@PolyModifiable Set<T> s, Object mutex) {
+    static <T> @PolyModifiable @PolyIteratorPolyMod Set<T> synchronizedSet(@PolyModifiable @PolyIteratorPolyMod Set<T> s, Object mutex) {
         return new SynchronizedSet<>(s, mutex);
     }
 
@@ -2963,13 +2996,13 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @param  list the list to be "wrapped" in a synchronized list.
      * @return a synchronized view of the specified list.
      */
-    public static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> list) {
+    public static <T> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<T> list) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list) :
                 new SynchronizedList<>(list));
     }
 
-    static <T> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<T> list, Object mutex) {
+    static <T> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<T> synchronizedList(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<T> list, Object mutex) {
         return (list instanceof RandomAccess ?
                 new SynchronizedRandomAccessList<>(list, mutex) :
                 new SynchronizedList<>(list, mutex));
@@ -3688,7 +3721,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      * @return a dynamically typesafe view of the specified collection
      * @since 1.5
      */
-    public static <E> @PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<E> checkedCollection(@PolyGrowShrink @PolyModifiable @PolyNonEmpty Collection<E> c,
+    public static <E> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<E> checkedCollection(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty Collection<E> c,
                                                       Class<E> type) {
         return new CheckedCollection<>(c, type);
     }
@@ -3942,7 +3975,7 @@ static class CheckedQueue<E>
      * @return a dynamically typesafe view of the specified set
      * @since 1.5
      */
-    public static <E> @PolyModifiable Set<E> checkedSet(@PolyModifiable Set<E> s, Class<E> type) {
+    public static <E> @PolyModifiable @PolyIteratorPolyMod Set<E> checkedSet(@PolyModifiable @PolyIteratorPolyMod Set<E> s, Class<E> type) {
         return new CheckedSet<>(s, type);
     }
 
@@ -4146,7 +4179,7 @@ public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {
      * @return a dynamically typesafe view of the specified list
      * @since 1.5
      */
-    public static <E> @PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> checkedList(@PolyGrowShrink @PolyModifiable @PolyNonEmpty List<E> list, Class<E> type) {
+    public static <E> @PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<E> checkedList(@PolyGrowShrink @PolyModifiable @PolyIteratorPolyMod @PolyNonEmpty List<E> list, Class<E> type) {
         return (list instanceof RandomAccess ?
                 new CheckedRandomAccessList<>(list, type) :
                 new CheckedList<>(list, type));

From aa4a47876790cb4365c01d98fd6992a43b7156a0 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 7 Jun 2026 16:05:38 -0700
Subject: [PATCH 110/119] annotate ProcessBuilder.

---
 src/java.base/share/classes/java/lang/ProcessBuilder.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/java.base/share/classes/java/lang/ProcessBuilder.java b/src/java.base/share/classes/java/lang/ProcessBuilder.java
index 5c9453402f29..c7cf224de855 100644
--- a/src/java.base/share/classes/java/lang/ProcessBuilder.java
+++ b/src/java.base/share/classes/java/lang/ProcessBuilder.java
@@ -26,6 +26,7 @@
 package java.lang;
 
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.mustcall.qual.MustCall;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.checker.tainting.qual.Untainted;
@@ -200,7 +201,7 @@ public final class ProcessBuilder
     // Lazily and racy initialize when needed, racy is ok, any logger is ok
     private static System.Logger LOGGER;
 
-    @Modifiable private List<String> command;
+    @Modifiable @IteratorPolyMod private List<String> command;
     private File directory;
     private Map<String,String> environment;
     private boolean redirectErrorStream;
@@ -284,7 +285,7 @@ public ProcessBuilder command(@Untainted String... command) {
      *
      * @return this process builder's program and its arguments
      */
-    public @Modifiable List<@Untainted String> command() {
+    public @Modifiable @IteratorPolyMod List<@Untainted String> command() {
         return command;
     }
 

From 43123f7290e651c8c48e2e2418076180d940b70a Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 8 Jun 2026 16:25:44 -0700
Subject: [PATCH 111/119] annotate @IteratorPolyMod on arrays.asList.

Co-authored-by: Copilot <copilot@github.com>
---
 src/java.base/share/classes/java/util/Arrays.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index 6d1a930f8322..dd7bebf99d88 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -32,6 +32,7 @@
 import org.checkerframework.checker.interning.qual.PolyInterned;
 import org.checkerframework.checker.lock.qual.GuardSatisfied;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
+import org.checkerframework.checker.modifiability.qual.IteratorPolyMod;
 import org.checkerframework.checker.mustcall.qual.MustCallUnknown;
 import org.checkerframework.checker.mustcall.qual.PolyMustCall;
 import org.checkerframework.checker.nonempty.qual.EnsuresNonEmptyIf;
@@ -4294,7 +4295,7 @@ private static boolean[] copyOfRangeBoolean(boolean[] original, int from, int to
     @SafeVarargs
     @SideEffectFree
     @SuppressWarnings("varargs")
-    public static <T> @Replaceable @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
+    public static <T> @Replaceable @IteratorPolyMod @PolyNonEmpty List<T> asList(T @PolyNonEmpty... a) {
         return new ArrayList<>(a);
     }
 

From b2876cb498e781cbdd7adfa118ac5a8258209af3 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Mon, 8 Jun 2026 17:56:13 -0700
Subject: [PATCH 112/119] annotated getOrDefault.

Co-authored-by: Copilot <copilot@github.com>
---
 src/java.base/share/classes/java/util/HashMap.java        | 4 +++-
 src/java.base/share/classes/java/util/Hashtable.java      | 4 +++-
 src/java.base/share/classes/java/util/LinkedHashMap.java  | 8 ++++++--
 src/java.base/share/classes/java/util/Map.java            | 2 +-
 src/java.base/share/classes/java/util/Properties.java     | 3 ++-
 .../classes/java/util/concurrent/ConcurrentHashMap.java   | 4 +++-
 .../share/classes/java/util/concurrent/ConcurrentMap.java | 5 ++++-
 .../java/util/concurrent/ConcurrentSkipListMap.java       | 4 +++-
 8 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index e2e56d733575..57104074c14e 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -1229,7 +1229,9 @@ public final void forEach(Consumer<? super Map.Entry<K,V>> action) {
 
     @Override
     @Pure
-    public V getOrDefault(HashMap<K,V> this, @GuardSatisfied @Nullable @UnknownSignedness Object key, V defaultValue) {
+    public @PolyModifiable V getOrDefault(HashMap<K, @PolyModifiable V> this,
+                                          @GuardSatisfied @Nullable @UnknownSignedness Object key,
+                                          @PolyModifiable V defaultValue) {
         Node<K,V> e;
         return (e = getNode(key)) == null ? defaultValue : e.value;
     }
diff --git a/src/java.base/share/classes/java/util/Hashtable.java b/src/java.base/share/classes/java/util/Hashtable.java
index cb7eaf080620..f6ba93a28f90 100644
--- a/src/java.base/share/classes/java/util/Hashtable.java
+++ b/src/java.base/share/classes/java/util/Hashtable.java
@@ -957,7 +957,9 @@ public synchronized int hashCode(@GuardSatisfied Hashtable<K, V> this) {
 
     @Override
     @Pure
-    public synchronized V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
+    public synchronized @PolyModifiable V getOrDefault(Hashtable<K, @PolyModifiable V> this,
+                                                       @GuardSatisfied @UnknownSignedness Object key,
+                                                       @PolyModifiable V defaultValue) {
         V result = get(key);
         return (null == result) ? defaultValue : result;
     }
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index f46bab271545..f73700ea8284 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -579,7 +579,9 @@ public boolean containsValue(@GuardSatisfied LinkedHashMap<K, V> this, @GuardSat
      */
     @CFComment("`getOrDefault()` is not strictly pure: if `accessOrder==true`, it changes the access order")
     @Pure
-    public V getOrDefault(@Nullable Object key, V defaultValue) {
+    public @PolyModifiable V getOrDefault(LinkedHashMap<K, @PolyModifiable V> this,
+                                          @Nullable Object key,
+                                          @PolyModifiable V defaultValue) {
        Node<K,V> e;
        if ((e = getNode(key)) == null)
            return defaultValue;
@@ -1289,7 +1291,9 @@ public void clear(@Shrinkable ReversedLinkedHashMapView<K,V> this) {
 
         @CFComment("`getOrDefault()` is not strictly pure: if `accessOrder==true`, it changes the access order")
         @Pure
-        public V getOrDefault(Object key, V defaultValue) {
+        public @PolyModifiable V getOrDefault(ReversedLinkedHashMapView<K, @PolyModifiable V> this,
+                                              Object key,
+                                              @PolyModifiable V defaultValue) {
             return base.getOrDefault(key, defaultValue);
         }
 
diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 4ea0da0de19a..897d3dc33790 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -755,7 +755,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @since 1.8
      */
     @Pure
-    default V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
+    default @PolyModifiable V getOrDefault(Map<K, @PolyModifiable V> this, @GuardSatisfied @UnknownSignedness Object key, @PolyModifiable V defaultValue) {
         V v;
         return (((v = get(key)) != null) || containsKey(key))
             ? v
diff --git a/src/java.base/share/classes/java/util/Properties.java b/src/java.base/share/classes/java/util/Properties.java
index 0d4b048197c7..742b87432a69 100644
--- a/src/java.base/share/classes/java/util/Properties.java
+++ b/src/java.base/share/classes/java/util/Properties.java
@@ -1527,7 +1527,8 @@ public synchronized int hashCode() {
 
     @Override
     @Pure
-    public Object getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key, Object defaultValue) {
+    public @PolyModifiable Object getOrDefault(@GuardSatisfied @Nullable @UnknownSignedness Object key,
+                                               @PolyModifiable Object defaultValue) {
         return map.getOrDefault(key, defaultValue);
     }
 
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
index 5e565d20aa2e..a5d1fcb14769 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentHashMap.java
@@ -1658,7 +1658,9 @@ public boolean replace(@Replaceable ConcurrentHashMap<K,V> this, K key, V oldVal
      * @throws NullPointerException if the specified key is null
      */
     @Pure
-    public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
+    public @PolyModifiable V getOrDefault(ConcurrentHashMap<K, @PolyModifiable V> this,
+                                          @GuardSatisfied @UnknownSignedness Object key,
+                                          @PolyModifiable V defaultValue) {
         V v;
         return (v = get(key)) == null ? defaultValue : v;
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 25da842e2671..77decb561b4b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -38,6 +38,7 @@
 import org.checkerframework.checker.modifiability.qual.Growable;
 import org.checkerframework.checker.modifiability.qual.MaybeModifiable;
 import org.checkerframework.checker.modifiability.qual.Modifiable;
+import org.checkerframework.checker.modifiability.qual.PolyModifiable;
 import org.checkerframework.checker.modifiability.qual.Replaceable;
 import org.checkerframework.checker.modifiability.qual.Shrinkable;
 import org.checkerframework.checker.nullness.qual.EnsuresKeyFor;
@@ -99,7 +100,9 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @Pure
-    default V getOrDefault(@MaybeModifiable ConcurrentMap<K,V> this,Object key, V defaultValue) {
+    default @PolyModifiable V getOrDefault(ConcurrentMap<K, @PolyModifiable V> this,
+                                           Object key,
+                                           @PolyModifiable V defaultValue) {
         V v;
         return ((v = get(key)) != null) ? v : defaultValue;
     }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index ea10c35aae08..e470ac5b7a0b 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -1352,7 +1352,9 @@ public V get(Object key) {
      * @since 1.8
      */
     @Pure
-    public V getOrDefault(@GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
+    public @PolyModifiable V getOrDefault(ConcurrentSkipListMap<K, @PolyModifiable V> this,
+                                          @GuardSatisfied @UnknownSignedness Object key,
+                                          @PolyModifiable V defaultValue) {
         V v;
         return (v = doGet(key)) == null ? defaultValue : v;
     }

From 600a1ebad07b3575d532d5241be1c1abb909f548 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Fri, 12 Jun 2026 12:05:30 -0700
Subject: [PATCH 113/119] Modifiability of `newLinkedHashMap()`

---
 src/java.base/share/classes/java/util/LinkedHashMap.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index f73700ea8284..0ca72c7140fc 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -1178,7 +1178,7 @@ public final void remove() {
      * @throws IllegalArgumentException if numMappings is negative
      * @since 19
      */
-    public static <K, V> LinkedHashMap<K, V> newLinkedHashMap(int numMappings) {
+    public static <K, V> @Modifiable LinkedHashMap<K, V> newLinkedHashMap(int numMappings) {
         if (numMappings < 0) {
             throw new IllegalArgumentException("Negative number of mappings: " + numMappings);
         }

From 77afd0a62646337761a68becf46847f21d10acbb Mon Sep 17 00:00:00 2001
From: Suzanne Millstein <smillst@cs.washington.edu>
Date: Fri, 12 Jun 2026 12:29:29 -0700
Subject: [PATCH 114/119] Remove `@PolyModifiable` from `Map#getOrDefault`

---
 src/java.base/share/classes/java/util/Map.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 897d3dc33790..2fc8de94521a 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -755,7 +755,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @since 1.8
      */
     @Pure
-    default @PolyModifiable V getOrDefault(Map<K, @PolyModifiable V> this, @GuardSatisfied @UnknownSignedness Object key, @PolyModifiable V defaultValue) {
+    default V getOrDefault(Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
         V v;
         return (((v = get(key)) != null) || containsKey(key))
             ? v

From b5187e8899494e51707be109b9661da0840da044 Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 14 Jun 2026 19:04:53 -0700
Subject: [PATCH 115/119] Revert "Remove `@PolyModifiable` from
 `Map#getOrDefault`"

This reverts commit 77afd0a62646337761a68becf46847f21d10acbb.
---
 src/java.base/share/classes/java/util/Map.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/java.base/share/classes/java/util/Map.java b/src/java.base/share/classes/java/util/Map.java
index 2fc8de94521a..897d3dc33790 100644
--- a/src/java.base/share/classes/java/util/Map.java
+++ b/src/java.base/share/classes/java/util/Map.java
@@ -755,7 +755,7 @@ public static <K, V> Comparator<Map.Entry<K, V>> comparingByValue(Comparator<? s
      * @since 1.8
      */
     @Pure
-    default V getOrDefault(Map<K, V> this, @GuardSatisfied @UnknownSignedness Object key, V defaultValue) {
+    default @PolyModifiable V getOrDefault(Map<K, @PolyModifiable V> this, @GuardSatisfied @UnknownSignedness Object key, @PolyModifiable V defaultValue) {
         V v;
         return (((v = get(key)) != null) || containsKey(key))
             ? v

From f63526e19191e0c2c9ffb77ed80fb3ce3c4557ba Mon Sep 17 00:00:00 2001
From: YukiYang31 <yukyang@cs.washington.edu>
Date: Sun, 14 Jun 2026 20:05:49 -0700
Subject: [PATCH 116/119] update checker jar.

---
 checker-qual.jar                              | Bin 295051 -> 295851 bytes
 .../formatter/qual/ConversionCategory.java    |   3 ++-
 .../qual/I18nConversionCategory.java          |   3 ++-
 .../modifiability/qual/IteratorPolyMod.java   |   7 +++--
 .../qual/MaybeIteratorPolyMod.java            |   2 +-
 .../modifiability/qual/MaybeModifiable.java   |  10 +++++---
 .../qual/PolyIteratorPolyMod.java             |  24 ++++++++++++++++++
 .../modifiability/qual/PolyModifiable.java    |   6 ++---
 .../qual/PreservesModifiability.java          |  12 +++++----
 .../modifiability/qual/Unmodifiable.java      |   7 ++---
 10 files changed, 54 insertions(+), 20 deletions(-)
 create mode 100644 src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyIteratorPolyMod.java

diff --git a/checker-qual.jar b/checker-qual.jar
index f092820db78cf011f728166dc7155ea511a0a7b3..f70c539535b30d13bf214f8ed6871be719311111 100644
GIT binary patch
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Aj{pDw

diff --git a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
index 0dabb92c2d23..ebbb00162814 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/formatter/qual/ConversionCategory.java
@@ -10,6 +10,7 @@
 import java.util.List;
 import java.util.Set;
 import java.util.StringJoiner;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -211,7 +212,7 @@ public static ConversionCategory fromConversionChar(char c) {
     throw new IllegalArgumentException("Bad conversion character " + c);
   }
 
-  private static <E> Set<E> arrayToSet(E[] a) {
+  private static <E> @Modifiable Set<E> arrayToSet(E[] a) {
     return new HashSet<>(Arrays.asList(a));
   }
 
diff --git a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
index 02da76a4c901..8a497c8f0eee 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/i18nformatter/qual/I18nConversionCategory.java
@@ -5,6 +5,7 @@
 import java.util.HashSet;
 import java.util.Set;
 import java.util.StringJoiner;
+import org.checkerframework.checker.modifiability.qual.Modifiable;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.checkerframework.framework.qual.AnnotatedFor;
 
@@ -89,7 +90,7 @@ public static I18nConversionCategory stringToI18nConversionCategory(String strin
     throw new IllegalArgumentException("Invalid format type " + string);
   }
 
-  private static <E> Set<E> arrayToSet(E[] a) {
+  private static <E> @Modifiable Set<E> arrayToSet(E[] a) {
     return new HashSet<>(Arrays.asList(a));
   }
 
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
index eab5c7afc93e..0fd6d04fcfd4 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/IteratorPolyMod.java
@@ -13,8 +13,11 @@
  *
  * <p>For example, if collection {@code c} has type {@code @Shrinkable}, then {@code c.iterator()}
  * also has type {@code @Shrinkable}. If list {@code l} has type {@code @Replaceable}, then {@code
- * l.listIterator()} also has type {@code @Replaceable}. For any collection whose type is
- * {@code @MaybeIteratorPolyMod}, its iterator is always {@code @MaybeShrinkable}.
+ * l.listIterator()} also has type {@code @Replaceable}.
+ *
+ * <p>If the collection itself is {@code @Unmodifiable}, then its iterator is {@code @Unshrinkable}.
+ * For any collection whose type is {@code @MaybeIteratorPolyMod}, its iterator is
+ * {@code @MaybeShrinkable}.
  *
  * <p>This annotation is used in GrowChecker, ShrinkChecker, and ReplaceChecker.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
index f113fdc671f6..d7a6ea8b5a49 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeIteratorPolyMod.java
@@ -9,7 +9,7 @@
 import org.checkerframework.framework.qual.SubtypeOf;
 
 /**
- * For the annotated collection, the return type of {@code iterator()} is {@code @Unshrinkable}.
+ * For the annotated collection, the return type of {@code iterator()} is {@code @MaybeShrinkable}.
  *
  * <p>This is the default qualifier for unannotated types.
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
index c4b7e274efda..eafb5cce1344 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/MaybeModifiable.java
@@ -7,12 +7,14 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias meaning {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable}. Represents
- * an unknown or arbitrary modifiability capability; the checker cannot determine whether the
- * collection is growable, shrinkable, or replaceable.
+ * Convenience alias meaning
+ * {@code @MaybeGrowable @MaybeSeqGrowable @MaybeShrinkable @MaybeReplaceable}. Represents an
+ * unknown or arbitrary modifiability capability; the checker cannot determine whether the
+ * collection is growable, sequenced-growable, shrinkable, or replaceable.
  *
  * <p>This annotation is not part of the type hierarchy; the Modifiability Checker expands it to
- * {@code @MaybeGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated type.
+ * {@code @MaybeGrowable @MaybeSeqGrowable @MaybeShrinkable @MaybeReplaceable} on each annotated
+ * type.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyIteratorPolyMod.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyIteratorPolyMod.java
new file mode 100644
index 000000000000..75c43c0090cb
--- /dev/null
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyIteratorPolyMod.java
@@ -0,0 +1,24 @@
+package org.checkerframework.checker.modifiability.qual;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import org.checkerframework.framework.qual.PolymorphicQualifier;
+
+/**
+ * A polymorphic qualifier for the Iterator hierarchy.
+ *
+ * <p>When used on a method, whether the return type has {@code @IteratorPolyMod} matches whether
+ * the argument or receiver annotated with {@code @PolyIteratorPolyMod} has
+ * {@code @IteratorPolyMod}.
+ *
+ * @checker_framework.manual #modifiability-checker Modifiability Checker
+ * @checker_framework.manual #qualifier-polymorphism Qualifier polymorphism
+ */
+@Documented
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.TYPE_USE, ElementType.TYPE_PARAMETER})
+@PolymorphicQualifier(MaybeIteratorPolyMod.class)
+public @interface PolyIteratorPolyMod {}
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
index 83724f7d4be5..9467ac599891 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PolyModifiable.java
@@ -5,11 +5,11 @@
 
 /**
  * Convenience alias meaning
- * {@code @PolyGrowable @PolyReplaceable @PolyShrinkable @PolySeqGrowable}. A polymorphic qualifier
- * for all four modifiability hierarchies.
+ * {@code @PolyGrowable @PolyReplaceable @PolyShrinkable @PolySeqGrowable @PolyIteratorPolyMod}. A
+ * polymorphic qualifier for all five modifiability hierarchies.
  *
  * <p>Write {@code @PolyModifiable} on methods that preserve or transfer modifiability, such as
- * {@code List.subList()} and {@code stream()}.
+ * {@code List.subList()}.
  *
  * <p>For example:
  *
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java
index 5bbcc4f6e677..c5f414ad7693 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/PreservesModifiability.java
@@ -10,12 +10,14 @@
  * The annotated method preserves modifiability capabilities from its first argument to its return
  * value.
  *
- * <p>For example, if the first argument is {@code @Modifiable} or {@code @IteratorPolyMod}, then
- * the return type is also {@code @Modifiable} or {@code @IteratorPolyMod}. If the first argument is
- * anything other than {@code @Modifiable} or {@code @IteratorPolyMod}, then the return type is the
- * top {@code @MaybeModifiable}.
+ * <p>For example, if the first argument has a positive modifiability capability, such as
+ * {@code @Growable}, {@code @SeqGrowable}, {@code @Shrinkable}, or {@code @Replaceable}, then the
+ * return type has that same capability. If the first argument is {@code @IteratorPolyMod}, then the
+ * return type is also {@code @IteratorPolyMod}. If the first argument has any other qualifier in a
+ * capability hierarchy, then the return type is the top qualifier in that hierarchy.
  *
- * <p>If the annotated method has no parameters, then this annotation has no effect on the method.
+ * <p>If the annotated method has no parameters or returns {@code void}, then this annotation has no
+ * effect on the method.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */
diff --git a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
index 2e233b798c11..9c4e5fb1dba6 100644
--- a/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
+++ b/src/java.base/share/classes/org/checkerframework/checker/modifiability/qual/Unmodifiable.java
@@ -7,13 +7,14 @@
 import java.lang.annotation.Target;
 
 /**
- * Convenience alias usually meaning {@code @Ungrowable @Unshrinkable @Unreplaceable}. Calling a
- * mutating operation (growing, shrinking, or replacing) may throw {@link
+ * Convenience alias usually meaning
+ * {@code @Ungrowable @SeqUngrowable @Unshrinkable @Unreplaceable}. Calling a mutating operation
+ * (growing, sequenced-growing, shrinking, or replacing) will throw {@link
  * UnsupportedOperationException}.
  *
  * <p>As an exception, {@code @Unmodifiable} means {@code @Maybe*} if the type does not support a
  * given category of operation; for example, {@code @Unmodifiable Iterator} means
- * {@code @MaybeGrowable @Unshrinkable @MaybeReplaceable Iterator}.
+ * {@code @MaybeGrowable @MaybeSeqGrowable @Unshrinkable @MaybeReplaceable Iterator}.
  *
  * @checker_framework.manual #modifiability-checker Modifiability Checker
  */

From 89a9748fe44daa2115c22c826e999e69f9b8f41d Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Wed, 16 Sep 2026 14:16:35 -0700
Subject: [PATCH 117/119] Fix incorrect purity and qualifier annotations

* `SimpleDeque`: add the missing import for `@SideEffectFree`, without
  which the jtreg support file does not compile.
* `Arrays.fill(long[], long)`: `@SideEffectsOnly("#1")` rather than
  `@Pure`; the body writes `a[i] = val`, and the 15 sibling overloads
  already use `@SideEffectsOnly("#1")`.
* `Collection`, `List`, `Set`, and `Collections.UnmodifiableEntrySet`:
  remove `@SideEffectFree` from `toArray(T[] a)`, which writes into the
  caller's array.  Commit aa687169ec5 did this for the other
  implementations but missed these.
* `LinkedHashMap.keySet`: restore `@KeyFor({"this"})`, dropped by
  accident; `HashMap.keySet`, which it overrides, declares it.
* `HashMap.entrySet`: the receiver is `@PolyModifiable`, matching `Map`,
  `AbstractMap`, and `LinkedHashMap`.  `@PolyModifiable` in the return
  type had nothing to resolve against.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 src/java.base/share/classes/java/util/Arrays.java        | 2 +-
 src/java.base/share/classes/java/util/Collection.java    | 1 -
 src/java.base/share/classes/java/util/Collections.java   | 1 -
 src/java.base/share/classes/java/util/HashMap.java       | 2 +-
 src/java.base/share/classes/java/util/LinkedHashMap.java | 2 +-
 src/java.base/share/classes/java/util/List.java          | 1 -
 src/java.base/share/classes/java/util/Set.java           | 1 -
 test/jdk/java/util/SequencedCollection/SimpleDeque.java  | 1 +
 8 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Arrays.java b/src/java.base/share/classes/java/util/Arrays.java
index 1cbc081c0f81..081873c8ae7c 100644
--- a/src/java.base/share/classes/java/util/Arrays.java
+++ b/src/java.base/share/classes/java/util/Arrays.java
@@ -3253,7 +3253,7 @@ public static <T> boolean equals(T[] a, int aFromIndex, int aToIndex,
      * @param a the array to be filled
      * @param val the value to be stored in all elements of the array
      */
-    @Pure
+    @SideEffectsOnly("#1")
     public static void fill(@PolySigned long[] a, @PolySigned long val) {
         for (int i = 0, len = a.length; i < len; i++)
             a[i] = val;
diff --git a/src/java.base/share/classes/java/util/Collection.java b/src/java.base/share/classes/java/util/Collection.java
index bc792a9ac114..52ea21d3941c 100644
--- a/src/java.base/share/classes/java/util/Collection.java
+++ b/src/java.base/share/classes/java/util/Collection.java
@@ -419,7 +419,6 @@ public interface Collection<E> extends Iterable<E> {
      *         runtime component type} of the specified array
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T extends @UnknownSignedness Object> @Nullable T[] toArray(@MaybeModifiable Collection<E> this, @PolyNull T[] a);
 
     /**
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 585312d4f607..664f39a91d0c 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -2139,7 +2139,6 @@ public Object[] toArray() {
             }
 
             @SuppressWarnings("unchecked")
-            @SideEffectFree
             public <T> @Nullable T[] toArray(@PolyNull T[] a) {
                 // We don't pass a to c.toArray, to avoid window of
                 // vulnerability wherein an unscrupulous multithreaded client
diff --git a/src/java.base/share/classes/java/util/HashMap.java b/src/java.base/share/classes/java/util/HashMap.java
index 97f19a971fe8..b0204a725e07 100644
--- a/src/java.base/share/classes/java/util/HashMap.java
+++ b/src/java.base/share/classes/java/util/HashMap.java
@@ -1170,7 +1170,7 @@ public final void forEach(Consumer<? super V> action) {
      * @return a set view of the mappings contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyShrinkable @GuardSatisfied HashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<Map.@PolyModifiable Entry<@KeyFor({"this"}) K,V>> entrySet(@PolyModifiable @GuardSatisfied HashMap<K, V> this) {
         Set<Map.Entry<K,V>> es;
         return (es = entrySet) == null ? (entrySet = new EntrySet()) : es;
     }
diff --git a/src/java.base/share/classes/java/util/LinkedHashMap.java b/src/java.base/share/classes/java/util/LinkedHashMap.java
index 40c6aa04af4a..79375231c010 100644
--- a/src/java.base/share/classes/java/util/LinkedHashMap.java
+++ b/src/java.base/share/classes/java/util/LinkedHashMap.java
@@ -665,7 +665,7 @@ protected boolean removeEldestEntry(@GuardSatisfied LinkedHashMap<K, V> this, Ma
      * @return a set view of the keys contained in this map
      */
     @SideEffectFree
-    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
+    public @IteratorPolyMod @PolyShrinkable @Ungrowable Set<@KeyFor({"this"}) K> keySet(@PolyShrinkable LinkedHashMap<K, V> this) {
         return sequencedKeySet();
     }
 
diff --git a/src/java.base/share/classes/java/util/List.java b/src/java.base/share/classes/java/util/List.java
index 2664f0c9e276..4f0903691ef3 100644
--- a/src/java.base/share/classes/java/util/List.java
+++ b/src/java.base/share/classes/java/util/List.java
@@ -279,7 +279,6 @@ public interface List<E> extends SequencedCollection<E> {
      *         this list
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T extends @UnknownSignedness Object> @Nullable T[] toArray(@MaybeModifiable List<E> this, @PolyNull T[] a);
 
 
diff --git a/src/java.base/share/classes/java/util/Set.java b/src/java.base/share/classes/java/util/Set.java
index 05784f4fb34f..9400e3d6f09f 100644
--- a/src/java.base/share/classes/java/util/Set.java
+++ b/src/java.base/share/classes/java/util/Set.java
@@ -250,7 +250,6 @@ public interface Set<E> extends Collection<E> {
      *         set
      * @throws NullPointerException if the specified array is null
      */
-    @SideEffectFree
     <T> @Nullable T [] toArray(@MaybeModifiable Set<E> this, @PolyNull T[] a);
 
 
diff --git a/test/jdk/java/util/SequencedCollection/SimpleDeque.java b/test/jdk/java/util/SequencedCollection/SimpleDeque.java
index 3524ba2c075f..4d2e3fa6dc91 100644
--- a/test/jdk/java/util/SequencedCollection/SimpleDeque.java
+++ b/test/jdk/java/util/SequencedCollection/SimpleDeque.java
@@ -22,6 +22,7 @@
  */
 
 import java.util.*;
+import org.checkerframework.dataflow.qual.SideEffectFree;
 
 /**
  * A complete Deque implementation that inherits the reversed() method

From a20b6fa54764e1266097c3ee07744cb1c288dddd Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Sun, 20 Sep 2026 17:54:48 -0700
Subject: [PATCH 118/119] Fix merge problems

---
 src/java.base/share/classes/java/util/Collections.java | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index 5b5f857c8297..f58f819e4f39 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -69,7 +69,6 @@
 import java.util.Collections.AsLIFOQueue;
 import java.util.Collections.CheckedCollection;
 import java.util.Collections.CheckedList;
-import java.util.Collections.CheckedMap.CheckedEntrySet;
 import java.util.Collections.CheckedNavigableMap;
 import java.util.Collections.CheckedNavigableSet;
 import java.util.Collections.CheckedQueue;
@@ -87,8 +86,6 @@
 import java.util.Collections.SynchronizedSortedSet;
 import java.util.Collections.UnmodifiableCollection;
 import java.util.Collections.UnmodifiableList;
-import java.util.Collections.UnmodifiableMap.UnmodifiableEntrySet;
-import java.util.Collections.UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableEntrySetSpliterator;
 import java.util.Collections.UnmodifiableNavigableMap;
 import java.util.Collections.UnmodifiableNavigableSet;
 import java.util.Collections.UnmodifiableRandomAccessList;
@@ -4048,7 +4045,6 @@ static class CheckedSortedSet<E> extends CheckedSet<E>
             ss = s;
         }
 
-        @Pure
         @Pure
         public @Nullable Comparator<? super E> comparator() { return ss.comparator(); }
         public E first()                   { return ss.first(); }

From e8c2526a7652d4af1ca5420ac35457f77198dcc4 Mon Sep 17 00:00:00 2001
From: Michael Ernst <mernst@cs.washington.edu>
Date: Mon, 21 Sep 2026 08:47:24 -0700
Subject: [PATCH 119/119] Address code review findings

* Restore `@PolyNonEmpty` on `ArrayList.iterator()` and `ArrayList.listIterator()`.
* Remove unsound `@PolyNonEmpty` from `AbstractList.listIterator(int)`, which
  returns an empty iterator when the index equals the size.
* Annotate `Collections.emptyIterator()` as `@Unmodifiable`, consistent with
  `emptyListIterator()` and with the inherited `EmptyIterator.remove()`.
* Annotate the `SortedMap` and `NavigableMap` key accessors, and their
  overrides, as `@Pure` rather than `@SideEffectFree`, matching the `SortedSet`
  and `NavigableSet` accessors and `ConcurrentSkipListMap`.  `firstEntry()` and
  `lastEntry()` remain `@SideEffectFree` because each call returns a new entry.
* Annotate the set views that delegate to those accessors as `@Pure`.
* Move `@Modifiable` from the element type to the iterator in
  `IdentityHashMap.EntrySet.iterator()`.
* Fix formatting: merged declarations in `ConcurrentLinkedDeque` and
  `ListIterator`, trailing whitespace in `ConcurrentNavigableMap`, and missing
  spaces in `ConcurrentMap` and `NavigableSet`.
* Remove redundant imports and an unnecessary `@SuppressWarnings("unchecked")`
  from `Collections`.
* Fix a typo in `README.md`.
---
 README.md                                     |  2 +-
 .../share/classes/java/util/AbstractList.java |  2 +-
 .../share/classes/java/util/ArrayList.java    |  4 +-
 .../share/classes/java/util/Collections.java  | 55 ++++++++-----------
 .../classes/java/util/IdentityHashMap.java    |  2 +-
 .../share/classes/java/util/ListIterator.java |  3 +-
 .../share/classes/java/util/NavigableMap.java |  9 +--
 .../share/classes/java/util/NavigableSet.java |  2 +-
 .../java/util/ReverseOrderSortedMapView.java  |  4 ++
 .../java/util/ReverseOrderSortedSetView.java  |  4 +-
 .../share/classes/java/util/SortedMap.java    |  4 +-
 .../share/classes/java/util/TreeMap.java      | 20 +++++--
 .../concurrent/ConcurrentLinkedDeque.java     |  4 +-
 .../java/util/concurrent/ConcurrentMap.java   |  2 +-
 .../concurrent/ConcurrentNavigableMap.java    | 10 ++--
 15 files changed, 68 insertions(+), 59 deletions(-)

diff --git a/README.md b/README.md
index 14cfbd568afb..8767fa374a25 100644
--- a/README.md
+++ b/README.md
@@ -148,7 +148,7 @@ cp -p $CHECKERFRAMEWORK/checker-qual/build/libs/checker-qual-*-sources.jar check
 jar tf checker-qual.jar | grep '\.java$' | grep -v 'module-info.java' | sed 's/\/[^/]*\.java/;/' | sed 's/\//./g' | sed 's/^/    exports /' | sort -u
 ```
 
-It addition to updating `.java` files, the command will output a list of export
+In addition to updating `.java` files, the command will output a list of export
 lines.  Place them in `src/java.base/share/classes/module-info.java`.  If no new
 packages were recently added to the Checker Framework, then likely no changes
 are needed in the `module-info.java` file.
diff --git a/src/java.base/share/classes/java/util/AbstractList.java b/src/java.base/share/classes/java/util/AbstractList.java
index c3f6df8c5c73..f6d173fce222 100644
--- a/src/java.base/share/classes/java/util/AbstractList.java
+++ b/src/java.base/share/classes/java/util/AbstractList.java
@@ -387,7 +387,7 @@ public boolean addAll(@IteratorPolyMod @Growable @GuardSatisfied AbstractList<E>
      *
      * @throws IndexOutOfBoundsException {@inheritDoc}
      */
-    public @PolyGrowShrink @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyNonEmpty AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
+    public @PolyGrowShrink ListIterator<E> listIterator(@PolyGrowShrink AbstractList<E> this, final @IndexOrHigh({"this"}) int index) {
         rangeCheckForAdd(index);
 
         return new ListItr(index);
diff --git a/src/java.base/share/classes/java/util/ArrayList.java b/src/java.base/share/classes/java/util/ArrayList.java
index 511fd6f97b4f..9e02fadd00a7 100644
--- a/src/java.base/share/classes/java/util/ArrayList.java
+++ b/src/java.base/share/classes/java/util/ArrayList.java
@@ -1107,7 +1107,7 @@ private void readObject(java.io.ObjectInputStream s)
      *
      * @see #listIterator(int)
      */
-    public @PolyGrowShrink @PolyModifiable ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable ArrayList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty ListIterator<E> listIterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ArrayList<E> this) {
         return new ListItr(0);
     }
 
@@ -1119,7 +1119,7 @@ private void readObject(java.io.ObjectInputStream s)
      * @return an iterator over the elements in this list in proper sequence
      */
     @SideEffectFree
-    public @PolyGrowShrink @PolyModifiable Iterator<E> iterator(@PolyGrowShrink @PolyModifiable ArrayList<E> this) {
+    public @PolyGrowShrink @PolyModifiable @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty ArrayList<E> this) {
         return new Itr();
     }
 
diff --git a/src/java.base/share/classes/java/util/Collections.java b/src/java.base/share/classes/java/util/Collections.java
index f58f819e4f39..d2481186965e 100644
--- a/src/java.base/share/classes/java/util/Collections.java
+++ b/src/java.base/share/classes/java/util/Collections.java
@@ -65,35 +65,6 @@
 import java.io.ObjectOutputStream;
 import java.io.Serializable;
 import java.lang.reflect.Array;
-import java.util.AbstractMap.SimpleImmutableEntry;
-import java.util.Collections.AsLIFOQueue;
-import java.util.Collections.CheckedCollection;
-import java.util.Collections.CheckedList;
-import java.util.Collections.CheckedNavigableMap;
-import java.util.Collections.CheckedNavigableSet;
-import java.util.Collections.CheckedQueue;
-import java.util.Collections.CheckedRandomAccessList;
-import java.util.Collections.CheckedSet;
-import java.util.Collections.CheckedSortedMap;
-import java.util.Collections.CheckedSortedSet;
-import java.util.Collections.SynchronizedCollection;
-import java.util.Collections.SynchronizedList;
-import java.util.Collections.SynchronizedNavigableMap;
-import java.util.Collections.SynchronizedNavigableSet;
-import java.util.Collections.SynchronizedRandomAccessList;
-import java.util.Collections.SynchronizedSet;
-import java.util.Collections.SynchronizedSortedMap;
-import java.util.Collections.SynchronizedSortedSet;
-import java.util.Collections.UnmodifiableCollection;
-import java.util.Collections.UnmodifiableList;
-import java.util.Collections.UnmodifiableNavigableMap;
-import java.util.Collections.UnmodifiableNavigableSet;
-import java.util.Collections.UnmodifiableRandomAccessList;
-import java.util.Collections.UnmodifiableSequencedCollection;
-import java.util.Collections.UnmodifiableSequencedSet;
-import java.util.Collections.UnmodifiableSet;
-import java.util.Collections.UnmodifiableSortedMap;
-import java.util.Collections.UnmodifiableSortedSet;
 import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
@@ -206,7 +177,6 @@ private Collections() {
      *         found to violate the {@link Comparable} contract
      * @see List#sort(Comparator)
      */
-    @SuppressWarnings("unchecked")
     @SideEffectsOnly("#1")
     public static <T extends Comparable<? super T>> void sort(@IteratorPolyMod @Replaceable List<T> list) {
         list.sort(null);
@@ -2355,7 +2325,9 @@ public SortedMap<K,V> headMap(K toKey)
         @SideEffectFree
         public SortedMap<K,V> tailMap(K fromKey)
                    { return new UnmodifiableSortedMap<>(sm.tailMap(fromKey)); }
+        @Pure
         public K firstKey()                           { return sm.firstKey(); }
+        @Pure
         public K lastKey()                             { return sm.lastKey(); }
     }
 
@@ -2435,9 +2407,13 @@ public NavigableSet<K> navigableKeySet()
         UnmodifiableNavigableMap(NavigableMap<K, ? extends V> m)
                                                             {super(m); nm = m;}
 
+        @Pure
         public @Nullable K lowerKey(K key)                   { return nm.lowerKey(key); }
+        @Pure
         public @Nullable K floorKey(K key)                   { return nm.floorKey(key); }
+        @Pure
         public @Nullable K ceilingKey(K key)               { return nm.ceilingKey(key); }
+        @Pure
         public @Nullable K higherKey(K key)                 { return nm.higherKey(key); }
 
         @SuppressWarnings("unchecked")
@@ -2836,9 +2812,11 @@ public SortedSet<E> tailSet(E fromElement) {
             }
         }
 
+        @Pure
         public E first() {
             synchronized (mutex) {return ss.first();}
         }
+        @Pure
         public E last() {
             synchronized (mutex) {return ss.last();}
         }
@@ -3473,9 +3451,11 @@ public SortedMap<K,V> tailMap(K fromKey) {
             }
         }
 
+        @Pure
         public K firstKey() {
             synchronized (mutex) {return sm.firstKey();}
         }
+        @Pure
         public K lastKey() {
             synchronized (mutex) {return sm.lastKey();}
         }
@@ -3558,18 +3538,22 @@ static class SynchronizedNavigableMap<K,V>
 
         public @Nullable Entry<K, V> lowerEntry(K key)
                         { synchronized (mutex) { return nm.lowerEntry(key); } }
+        @Pure
         public @Nullable K lowerKey(K key)
                           { synchronized (mutex) { return nm.lowerKey(key); } }
         public @Nullable Entry<K, V> floorEntry(K key)
                         { synchronized (mutex) { return nm.floorEntry(key); } }
+        @Pure
         public @Nullable K floorKey(K key)
                           { synchronized (mutex) { return nm.floorKey(key); } }
         public @Nullable Entry<K, V> ceilingEntry(K key)
                       { synchronized (mutex) { return nm.ceilingEntry(key); } }
+        @Pure
         public @Nullable K ceilingKey(K key)
                         { synchronized (mutex) { return nm.ceilingKey(key); } }
         public @Nullable Entry<K, V> higherEntry(K key)
                        { synchronized (mutex) { return nm.higherEntry(key); } }
+        @Pure
         public @Nullable K higherKey(K key)
                          { synchronized (mutex) { return nm.higherKey(key); } }
         public @Nullable Entry<K, V> firstEntry()
@@ -4047,6 +4031,7 @@ static class CheckedSortedSet<E> extends CheckedSet<E>
 
         @Pure
         public @Nullable Comparator<? super E> comparator() { return ss.comparator(); }
+        @Pure
         public E first()                   { return ss.first(); }
         @Pure
         public E last()                    { return ss.last(); }
@@ -4852,7 +4837,9 @@ static class CheckedSortedMap<K,V> extends CheckedMap<K,V>
 
         @Pure
         public @Nullable Comparator<? super K> comparator() { return sm.comparator(); }
+        @Pure
         public K firstKey()                       { return sm.firstKey(); }
+        @Pure
         public K lastKey()                        { return sm.lastKey(); }
 
         @SideEffectFree
@@ -4932,7 +4919,9 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
 
         @Pure
         public @Nullable Comparator<? super K> comparator()   { return nm.comparator(); }
+        @Pure
         public K firstKey()                           { return nm.firstKey(); }
+        @Pure
         public K lastKey()                             { return nm.lastKey(); }
 
         public @Nullable Entry<K, V> lowerEntry(K key) {
@@ -4942,6 +4931,7 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
                 : null;
         }
 
+        @Pure
         public @Nullable K lowerKey(K key)                   { return nm.lowerKey(key); }
 
         public @Nullable Entry<K, V> floorEntry(K key) {
@@ -4951,6 +4941,7 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
                 : null;
         }
 
+        @Pure
         public @Nullable K floorKey(K key)                   { return nm.floorKey(key); }
 
         public @Nullable Entry<K, V> ceilingEntry(K key) {
@@ -4960,6 +4951,7 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
                 : null;
         }
 
+        @Pure
         public @Nullable K ceilingKey(K key)               { return nm.ceilingKey(key); }
 
         public @Nullable Entry<K, V> higherEntry(K key) {
@@ -4969,6 +4961,7 @@ static class CheckedNavigableMap<K,V> extends CheckedSortedMap<K,V>
                 : null;
         }
 
+        @Pure
         public @Nullable K higherKey(K key)                 { return nm.higherKey(key); }
 
         public @Nullable Entry<K, V> firstEntry() {
@@ -5080,7 +5073,7 @@ public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {
      */
     @SuppressWarnings("unchecked")
     @SideEffectFree
-    public static <T> @Modifiable Iterator<T> emptyIterator() {
+    public static <T> @Unmodifiable Iterator<T> emptyIterator() {
         return (Iterator<T>) EmptyIterator.EMPTY_ITERATOR;
     }
 
diff --git a/src/java.base/share/classes/java/util/IdentityHashMap.java b/src/java.base/share/classes/java/util/IdentityHashMap.java
index 2ed3d81169b2..48cd25d628a8 100644
--- a/src/java.base/share/classes/java/util/IdentityHashMap.java
+++ b/src/java.base/share/classes/java/util/IdentityHashMap.java
@@ -1298,7 +1298,7 @@ public Spliterator<V> spliterator() {
 
     private class EntrySet extends AbstractSet<Map.Entry<K,V>> {
         @SideEffectFree
-        public Iterator<Map.@Modifiable Entry<K,V>> iterator() {
+        public @Modifiable Iterator<Map.Entry<K,V>> iterator() {
             return new EntryIterator();
         }
         @Pure
diff --git a/src/java.base/share/classes/java/util/ListIterator.java b/src/java.base/share/classes/java/util/ListIterator.java
index bbf723b70a74..5b1aa4d9bd35 100644
--- a/src/java.base/share/classes/java/util/ListIterator.java
+++ b/src/java.base/share/classes/java/util/ListIterator.java
@@ -223,4 +223,5 @@ public interface ListIterator<E> extends Iterator<E> {
     @CFComment("Not @EnsuresNonEmpty(this) because this adds *before* the cursor.")
     @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    void add(@Growable @GuardSatisfied ListIterator<E> this, E e);}
+    void add(@Growable @GuardSatisfied ListIterator<E> this, E e);
+}
diff --git a/src/java.base/share/classes/java/util/NavigableMap.java b/src/java.base/share/classes/java/util/NavigableMap.java
index e2285bc3e5f6..ffaa760cbe16 100644
--- a/src/java.base/share/classes/java/util/NavigableMap.java
+++ b/src/java.base/share/classes/java/util/NavigableMap.java
@@ -43,6 +43,7 @@
 import org.checkerframework.checker.modifiability.qual.Ungrowable;
 import org.checkerframework.checker.nullness.qual.KeyFor;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.dataflow.qual.Pure;
 import org.checkerframework.dataflow.qual.SideEffectFree;
 import org.checkerframework.dataflow.qual.SideEffectsOnly;
 import org.checkerframework.framework.qual.AnnotatedFor;
@@ -145,7 +146,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
-    @SideEffectFree
+    @Pure
     @Nullable K lowerKey(K key);
 
     /**
@@ -176,7 +177,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
-    @SideEffectFree
+    @Pure
     @Nullable K floorKey(K key);
 
     /**
@@ -207,7 +208,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
-    @SideEffectFree
+    @Pure
     @Nullable K ceilingKey(K key);
 
     /**
@@ -238,7 +239,7 @@ public interface NavigableMap<K,V> extends SortedMap<K,V> {
      * @throws NullPointerException if the specified key is null
      *         and this map does not permit null keys
      */
-    @SideEffectFree
+    @Pure
     @Nullable K higherKey(K key);
 
     /**
diff --git a/src/java.base/share/classes/java/util/NavigableSet.java b/src/java.base/share/classes/java/util/NavigableSet.java
index 46148cc025ab..9a661d7cebca 100644
--- a/src/java.base/share/classes/java/util/NavigableSet.java
+++ b/src/java.base/share/classes/java/util/NavigableSet.java
@@ -190,7 +190,7 @@
      * @return an iterator over the elements in this set, in ascending order
      */
     @SideEffectFree
-    @PolyModifiable@PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> this);
+    @PolyModifiable @PolyGrowShrink @PolyNonEmpty Iterator<E> iterator(@PolyGrowShrink @PolyModifiable @PolyNonEmpty NavigableSet<E> this);
 
     /**
      * Returns a reverse order view of the elements contained in this set.
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
index 095d952e02de..1169732bad82 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedMapView.java
@@ -168,10 +168,12 @@ public SortedMap<K, V> reversed() {
         return base;
     }
 
+    @Pure
     public K firstKey() {
         return base.lastKey();
     }
 
+    @Pure
     public K lastKey() {
         return base.firstKey();
     }
@@ -486,10 +488,12 @@ public int size() {
             return cmp;
         }
 
+        @Pure
         public K firstKey() {
             return this.entryIterator().next().getKey();
         }
 
+        @Pure
         public K lastKey() {
             var it = this.entryIterator();
             if (! it.hasNext())
diff --git a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
index ea3d0cdd238f..385db239437d 100644
--- a/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
+++ b/src/java.base/share/classes/java/util/ReverseOrderSortedSetView.java
@@ -365,12 +365,12 @@ public int size() {
             return ReverseOrderSortedSetView.this.comparator();
         }
 
-        @SideEffectFree
+        @Pure
         public E first() {
             return this.iterator().next();
         }
 
-        @SideEffectFree
+        @Pure
         public E last() {
             var it = this.iterator();
             if (! it.hasNext())
diff --git a/src/java.base/share/classes/java/util/SortedMap.java b/src/java.base/share/classes/java/util/SortedMap.java
index d431d330faa7..80620c5dc68d 100644
--- a/src/java.base/share/classes/java/util/SortedMap.java
+++ b/src/java.base/share/classes/java/util/SortedMap.java
@@ -236,7 +236,7 @@
      * @return the first (lowest) key currently in this map
      * @throws NoSuchElementException if this map is empty
      */
-    @SideEffectFree
+    @Pure
     @KeyFor("this") K firstKey(@GuardSatisfied @NonEmpty SortedMap<K, V> this);
 
     /**
@@ -245,7 +245,7 @@
      * @return the last (highest) key currently in this map
      * @throws NoSuchElementException if this map is empty
      */
-    @SideEffectFree
+    @Pure
     @KeyFor("this") K lastKey(@GuardSatisfied @NonEmpty SortedMap<K, V> this);
 
     /**
diff --git a/src/java.base/share/classes/java/util/TreeMap.java b/src/java.base/share/classes/java/util/TreeMap.java
index d0191927b5cc..3f3cb0bf46ff 100644
--- a/src/java.base/share/classes/java/util/TreeMap.java
+++ b/src/java.base/share/classes/java/util/TreeMap.java
@@ -334,7 +334,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    @SideEffectFree
+    @Pure
     public @KeyFor("this") K firstKey(@NonEmpty TreeMap<K,V> this) {
         return key(getFirstEntry());
     }
@@ -342,7 +342,7 @@ public boolean containsValue(@GuardSatisfied TreeMap<K, V> this, @GuardSatisfied
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
-    @SideEffectFree
+    @Pure
     public @KeyFor("this") K lastKey(@NonEmpty TreeMap<K,V> this) {
         return key(getLastEntry());
     }
@@ -1084,7 +1084,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
-    @SideEffectFree
+    @Pure
     public @Nullable K lowerKey(K key) {
         return keyOrNull(getLowerEntry(key));
     }
@@ -1108,7 +1108,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
-    @SideEffectFree
+    @Pure
     public @Nullable K floorKey(K key) {
         return keyOrNull(getFloorEntry(key));
     }
@@ -1132,7 +1132,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
-    @SideEffectFree
+    @Pure
     public @Nullable K ceilingKey(K key) {
         return keyOrNull(getCeilingEntry(key));
     }
@@ -1156,7 +1156,7 @@ public void clear(@Shrinkable @GuardSatisfied TreeMap<K, V> this) {
      *         does not permit null keys
      * @since 1.6
      */
-    @SideEffectFree
+    @Pure
     public @Nullable K higherKey(K key) {
         return keyOrNull(getHigherEntry(key));
     }
@@ -2044,6 +2044,7 @@ public final boolean containsKey(@UnknownSignedness Object key) {
             return exportEntry(subCeiling(key));
         }
 
+        @Pure
         public final @Nullable K ceilingKey(K key) {
             return keyOrNull(subCeiling(key));
         }
@@ -2052,6 +2053,7 @@ public final boolean containsKey(@UnknownSignedness Object key) {
             return exportEntry(subHigher(key));
         }
 
+        @Pure
         public final @Nullable K higherKey(K key) {
             return keyOrNull(subHigher(key));
         }
@@ -2060,6 +2062,7 @@ public final boolean containsKey(@UnknownSignedness Object key) {
             return exportEntry(subFloor(key));
         }
 
+        @Pure
         public final @Nullable K floorKey(K key) {
             return keyOrNull(subFloor(key));
         }
@@ -2068,14 +2071,17 @@ public final boolean containsKey(@UnknownSignedness Object key) {
             return exportEntry(subLower(key));
         }
 
+        @Pure
         public final @Nullable K lowerKey(K key) {
             return keyOrNull(subLower(key));
         }
 
+        @Pure
         public final K firstKey() {
             return key(subLowest());
         }
 
+        @Pure
         public final K lastKey() {
             return key(subHighest());
         }
@@ -2600,7 +2606,9 @@ private Object readResolve() {
         }
         @SideEffectFree
         public Set<Map.Entry<K,V>> entrySet() { throw new InternalError(); }
+        @Pure
         public K lastKey() { throw new InternalError(); }
+        @Pure
         public K firstKey() { throw new InternalError(); }
         @SideEffectFree
         public SortedMap<K,V> subMap(K fromKey, K toKey) { throw new InternalError(); }
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
index 534a7143cde9..e001002516ae 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentLinkedDeque.java
@@ -1048,7 +1048,8 @@ public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
 
     @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
-    public @Nullable E poll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this)           { return pollFirst(); }    @Pure
+    public @Nullable E poll(@Shrinkable @CanShrink ConcurrentLinkedDeque<E> this)           { return pollFirst(); }
+    @Pure
     public @Nullable E peek()           { return peekFirst(); }
 
     /**
@@ -1057,6 +1058,7 @@ public boolean add(@Growable ConcurrentLinkedDeque<E> this, E e) {
     @SideEffectsOnly("this")
     @DoesNotUnrefineReceiver("modifiability")
     public E remove(@Shrinkable @NonEmpty @CanShrink ConcurrentLinkedDeque<E> this)         { return removeFirst(); }
+
     /**
      * @throws NoSuchElementException {@inheritDoc}
      */
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
index 1fab3cb06327..2cf609428b6e 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentMap.java
@@ -128,7 +128,7 @@ public interface ConcurrentMap<K extends @NonNull Object,V extends @NonNull Obje
      */
     @Override
     @DoesNotUnrefineReceiver("modifiability")
-    default void forEach(@MaybeModifiable ConcurrentMap<K,V> this,BiConsumer<? super K, ? super V> action) {
+    default void forEach(@MaybeModifiable ConcurrentMap<K,V> this, BiConsumer<? super K, ? super V> action) {
         Objects.requireNonNull(action);
         for (Map.Entry<K,V> entry : entrySet()) {
             K k;
diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
index 88089e87c66f..1eb2448eac2a 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentNavigableMap.java
@@ -76,7 +76,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
                                         K toKey, boolean inclusive);
 
     /**
@@ -85,7 +85,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
                                         K fromKey, boolean inclusive);
 
     /**
@@ -94,7 +94,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+    @PolyModifiable ConcurrentNavigableMap<K,V> subMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
                                        K fromKey, K toKey);
 
     /**
@@ -103,7 +103,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+    @PolyModifiable ConcurrentNavigableMap<K,V> headMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
                                         K toKey);
 
     /**
@@ -112,7 +112,7 @@ public interface ConcurrentNavigableMap<K,V>
      * @throws IllegalArgumentException {@inheritDoc}
      */
     @SideEffectFree
-    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this, 
+    @PolyModifiable ConcurrentNavigableMap<K,V> tailMap(@PolyModifiable ConcurrentNavigableMap<K,V> this,
                                         K fromKey);
 
     /**