Cleanup for Navigator code #125724
Description
The navigator.dart has ~10 repeats of things like:
final _RouteEntry? currentRouteEntry = _navigator!._history.cast<_RouteEntry?>().lastWhere(
(_RouteEntry? e) => e != null && _RouteEntry.isPresentPredicate(e),
orElse: () => null,
);while it can be greatly simplified as:
final _RouteEntry? currentRouteEntry = _navigator!._history.lastWhereOrNull(_RouteEntry.isPresentPredicate);Thus, it seems that we can beautify the code a little bit.