// Copyright 2014 The Flutter Authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.import'package:flutter/material.dart';voidmain(){runApp(constMyApp());}classMyAppextendsStatefulWidget{
@overrideMyAppStatecreateState()=>MyAppState();}classMyAppStateextendsState<MyApp>{StringkMessage='ABC';@overrideWidgetbuild(BuildContextcontext){// cause cast error.print(kMessageasint);returnconstText('Hello');}}