在Flutter auto_route包中，我需要将构建器转换为什么类型？

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home Page'),
      ),
      body: Center(
        child: ElevatedButton(
          child: Text('Go to Details Page'),
          onPressed: () {
            // 使用auto_route导航到Details页面
            AutoRouter.of(context).push(DetailsRoute());
          },
        ),
      ),
    );
  }
}

class DetailsPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Details Page'),
      ),
      body: Center(
        child: Text('This is the details page.'),
      ),
    );
  }
}

@MaterialAutoRouter(
  routes: <AutoRoute>[
    AutoRoute(page: MyHomePage, initial: true),
    AutoRoute(page: DetailsPage),
  ],
)
class $AppRouter {}