如何访问推送路由的InheritedWidget的数据？

class MyData extends InheritedWidget {
  final String data;

  MyData({Key key, @required this.data, @required Widget child})
      : super(key: key, child: child);

  static MyData of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<MyData>();
  }

  @override
  bool updateShouldNotify(MyData oldWidget) {
    return data != oldWidget.data;
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myData = MyData.of(context);
    final data = myData?.data ?? "";

    return Container(
      child: Text(data),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MyData(
      data: "Hello, World!",
      child: MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text("My App"),
          ),
          body: MyWidget(),
        ),
      ),
    );
  }
}