anchor.diff:    A(@foo int a);
   }
   ''');
  -    // TODO(scheglov) Enhance to show metadata on formal parameters?
       checkElementText(library, r'''
   library
     definingUnit
  
positive.code: @foo
  set setter(@foo int a) {}
  ''');
      // TODO(scheglov) Enhance to show metadata on formal parameters?
      checkElementText(library, r'''
  library
    definingUnit
  
negative.code:   set setter(@foo int a) {}
  }
  ''');
      checkElementText(library, r'''
  library
    definingUnit
  