How to report undefined variables, etc.?

[plt3]

Hello,

I recently installed groovy-language-server (via mason.nvim) to use to work on Jenkinsfiles in Neovim. Functionality like go to definition, autocomplete, or even variable rename work great, and I also get syntax error warnings to appear as expected if I don't close a quote or parenthesis. However, something like

def my_var = "test"
println(other_var)

does not show any errors, even though I am trying to print an undefined variable. Is there something in groovy-language-server to be configured to get this sort of behavior?

Thank you for this project!