class MyApp extends StatelessWidget {
  const MyApp({super.key});
  String logState(GoRouterState state) {
    return 'Current route: ${state.location}, params: ${state.params}, queryParams: ${state.queryParams}';
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'Flutter Demo',
      routerConfig: GoRouter(
        initialLocation: '/a',
        routes: [
          ShellRoute(
            builder: (context, state, child) {
              return Scaffold(
                body: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Text('ShellRoute: ${logState(state)}'),
                    Expanded(child: child),
                  ],
                ),
              );
            },
            routes: [
              GoRoute(
                path: '/a',
                builder: (context, state) => Text('a: ${logState(state)}'),
              ),
              GoRoute(
                path: '/b/:bParam',
                builder: (context, state) => Text('b: ${logState(state)}'),
              ),
            ],
          )
        ],
      ),
    );
  }
}