didPop method Null safety

  1. @override
void didPop(
  1. Route route,
  2. Route? previousRoute
)
override

The Navigator popped route.

The route immediately below that one, and thus the newly active route, is previousRoute.

Implementation

@override
void didPop(Route<dynamic> route, Route<dynamic>? previousRoute) {
  assert(navigator != null);
  assert(route != null);
  // Don't trigger another flight when a pop is committed as a user gesture
  // back swipe is snapped.
  if (!navigator!.userGestureInProgress) {
    _maybeStartHeroTransition(route, previousRoute, HeroFlightDirection.pop, false);
  }
}