如何在flutter中发送有状态的widget数据？

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  String _data = 'Initial Data';

  @override
  Widget build(BuildContext context) {
    return Container(
      child: Column(
        children: [
          Text(_data),
          RaisedButton(
            child: Text('Update Data'),
            onPressed: () {
              setState(() {
                _data = 'Updated Data';
              });
            },
          ),
        ],
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Stateful Widget Example'),
        ),
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}