Unhandled Exception: '_currentHandle != null && _materializer != null': is not true. about nativeshell HOT 7 OPEN

        MenuItem(
            title: controller.selection.isCollapsed ? 'Save_' : 'Save', // change title when section changes
            accelerator: cmdOrCtrl + 's',
            action: controller.selection.isCollapsed ? null : () {},
          ),

  late Menu menu;
  @override
  void initState() {
    super.initState();
    menu = Menu(_buildMenu);
    window.setWindowMenu(menu);
    notifier.addListener(_onDocumentOrComposerUpdated);
  }
  void _onDocumentOrComposerUpdated() {
      menu.update();
  }

class TextFieldMenuBuilder extends StatefulWidget {
  const TextFieldMenuBuilder({
    Key? key,
    required this.child,
  }) : super(key: key);

  final Widget child;

  @override
  _TextFieldMenuBuilderState createState() => _TextFieldMenuBuilderState();
}

class _TextFieldMenuBuilderState extends State<TextFieldMenuBuilder> {
  late Menu _menu;
  late final TextEditingController controller;

  @override
  void initState() {
    super.initState();
    controller = TextEditingController();
    controller.addListener(_onTextOrSelectionChanged);
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _menu = Menu(_buildMenu);
    Window.of(context).setWindowMenu(_menu);
  }

  void _onTextOrSelectionChanged() {
    _menu.update();
  }

  List<MenuItem> _buildMenu() {
    return [
      if (Platform.isMacOS)
        MenuItem.children(
          title: 'App',
          children: [
            MenuItem.withRole(role: MenuItemRole.hide),
          ],
        ),
      MenuItem.children(
        title: '&File',
        children: [
          MenuItem(title: 'New', accelerator: cmdOrCtrl + 'n', action: null),
          MenuItem.separator(),
          // COMMAND OF INTEREST
          MenuItem(
            title: 'Save',
            accelerator: cmdOrCtrl + 's',
            action: controller.selection.isCollapsed ? null : () {},
          ),
        ],
      ),
    ];
  }

  @override
  Widget build(BuildContext context) {
    return Center(
      child: TextField(
        controller: controller,
      ),
    );
  }
}