anchor.diff:  
       if (element.isInstanceMember) {
         elementAccess = emitter.constructorAccess(element.enclosingClass);
  -      name = namer.getNameOfMember(element);
  +      name = namer.instanceMethodName(element);
       } else {
         elementAccess = emitter.staticFunctionAccess(element);
       }
  
positive.code:   }
  
    jsAst.Expression invokeDefineClass(ClassElementX cls) {
      String name = namer.getNameOfClass(cls);
      var descriptor = js('Object.create(null)');
      return js(
          r'''
  
negative.code:     wasStateCaptured = true;
  
      prototypeAccess = emitter.prototypeAccess(element.enclosingClass);
      getterName = namer.getterForElement(element);
      setterName = namer.setterForElement(element);
    }
  
    FieldElementX apply() {
  