Flutter:无法从showModalBottomSheet访问提供程序

class MyProvider extends InheritedWidget {
  final String data;

  MyProvider({required this.data, required Widget child}) : super(child: child);

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MyProvider(
      data: 'Hello World',
      child: MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: Text('Flutter App'),
          ),
          body: Center(
            child: ElevatedButton(
              child: Text('Show Modal Bottom Sheet'),
              onPressed: () {
                showModalBottomSheet(
                  context: context,
                  builder: (BuildContext context) {
                    final provider = MyProvider.of(context);
                    return Container(
                      child: Text(provider?.data ?? ''),
                    );
                  },
                );
              },
            ),
          ),
        ),
      ),
    );
  }
}