require-css load css file folder name conflict with plugin name

[zhangleijie]

my require.config

the result is success

I define plugin name is [css] look my config

the css file load is canceled

map: {
'*': {
// 'cssd': 'plugin/css' // or whatever the path to require-css is
'css': 'plugin/css' // or whatever the path to require-css is
}
},

the child map on require.config css name can't be same with comon/css
The comon child css folder name can't be same with 'CSS': 'plugin/css'
THE NAME CSS.