如何让我的主题数据在Flutter中转到新的页面

// 数据模型类
class ThemeDataModel {
  final String themeName;
  final Color themeColor;

  ThemeDataModel(this.themeName, this.themeColor);
}

// 源页面
class SourcePage extends StatelessWidget {
  final ThemeDataModel themeData = ThemeDataModel('Dark Theme', Colors.black);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Source Page'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Go to Target Page'),
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(
                builder: (context) => TargetPage(themeData),
              ),
            );
          },
        ),
      ),
    );
  }
}

// 目标页面
class TargetPage extends StatelessWidget {
  final ThemeDataModel themeData;

  TargetPage(this.themeData);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Target Page'),
      ),
      body: Center(
        child: Text(
          'Theme Name: ${themeData.themeName}\n'
          'Theme Color: ${themeData.themeColor}',
        ),
      ),
    );
  }
}