Consider the following:

class Foo {
  static getBar() { 'bar' }
  Object getBaz() { 'baz' }
}

Foo.with {
  bar
  baz
  getBar()
  getBaz()
}

def cls = String
def num = cls.valueOf(123)
num = cls.with { valueOf(456) }

"bar" and "getBar" should be highlighted as a static method reference. "baz" and "getBaz" are correctly indicagted as unknown (underlined). Similarly "valueOf" within the closure should resolve to String#valueOf.