flutter_nav_tut

.\lib\main.dart

// ...
class _MainPageState extends State<MainPage> {  
  // ...
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // ...
      drawer: Drawer(
        child: ListView(
          children: <Widget>[
            // ...            
            ListTile(
              title: Text('Routed Navigation'),
              trailing: Icon(Icons.arrow_forward),
              onTap: () {
                Navigator.of(context).pop();
                Navigator.pushNamed(context, '/newPage');
              },
            ),
            // Here will be some Code
          ],
        ),
      ),
    );
  }
}