How to use BottomNavigationBar with Navigator?

Question

The Flutter Gallery example of BottomNavigationBar uses a Stack of FadeTransitions in the body of the Scaffold.

I

Answer 1

Navigator.of(context).pushNamedAndRemoveUntil(
                routes[value], (route) => true);

I had to use true to enable back button.

NB: I was using Navigator.pushNamed() for navigation.