当一个statefulwidget中的按钮被点击时，如何在另一个statefulwidget中设置setstate？

class FirstWidget extends StatefulWidget {
  @override
  _FirstWidgetState createState() => _FirstWidgetState();
}

class _FirstWidgetState extends State<FirstWidget> {
  bool _isButtonClicked = false;

  void _handleButtonClick() {
    setState(() {
      _isButtonClicked = true;
    });
  }

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: _handleButtonClick,
      child: Text('Click Me'),
    );
  }
}

class SecondWidget extends StatefulWidget {
  final Function setStateCallback;

  SecondWidget({this.setStateCallback});

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

class _SecondWidgetState extends State<SecondWidget> {
  bool _isButtonClicked = false;

  void _updateState() {
    setState(() {
      _isButtonClicked = widget.setStateCallback();
    });
  }

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: _updateState,
      child: Text('Update State'),
    );
  }
}

class ParentWidget extends StatefulWidget {
  @override
  _ParentWidgetState createState() => _ParentWidgetState();
}

class _ParentWidgetState extends State<ParentWidget> {
  bool _isButtonClicked = false;

  bool _handleButtonClick() {
    setState(() {
      _isButtonClicked = true;
    });
    return _isButtonClicked;
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        FirstWidget(),
        SecondWidget(setStateCallback: _handleButtonClick),
      ],
    );
  }
}