Consider the following:

class Test {
  void meth() {
    new Bean(number: 0, string: '')
  }
}

class Bean {
  Number number
  String string
}

Code select is not available on Bean in "new Bean)...".

Also, if number: 0, string: '' is replaced with /*number: 0, string: ''*/, "number" and "string" are still code selectable.