anchor.diff:  @foo
   set setter(@foo int a) {}
   ''');
  -    // TODO(scheglov) Enhance to show metadata on formal parameters?
       checkElementText(library, r'''
   library
     definingUnit
  
positive.code: @foo
  void f<@foo T>({@foo int? a = 42}) {}
  ''');
      // TODO(scheglov) Enhance to show metadata on formal parameters?
      checkElementText(library, r'''
  library
    definingUnit
  
negative.code:   void method<@foo T>(@foo int a) {}
  }
  ''');
      checkElementText(library, r'''
  library
    definingUnit
  