build method

@override Widget build(BuildContext context)

Of course, You're free to override this function if you like

Implementation

@override
Widget build(BuildContext context) => Navigator(
      key: navigatorKey,
      pages: [
        homePage ??= _materialPage(context, '/', home),
        // Navigator 2.0 is declarative! Update _pages appropriately.
        if (_pages.isNotEmpty) _pages.last,
      ],
      // Navigator 1.0
      onPopPage: (route, result) {
        //
        final pop = route.didPop(result);

        if (pop) {
          //
          _currentConfiguration = _previousRoute();

          // Notify Navigator 2.0
          notifyListeners();
        }
        return pop;
      },
      reportsRouteUpdateToEngine: true,
    );