fltkeep-command_handler-usage.dart

class _HomeScreenState extends State<HomeScreen> with CommandHandler {
  Widget _fab(BuildContext context) => FloatingActionButton(
    child: const Icon(Icons.add),
    onPressed: () async {
      final command = await Navigator.pushNamed(context, '/note');
      processNoteCommand(_scaffoldKey.currentState, command);
    },
  );
  ...
}