impliesAppBarDismissal property Null safety
Whether an AppBar in the route should automatically add a back button or close button.
This getter returns true if there is at least one active route below it,
or there is at least one LocalHistoryEntry with impliesAppBarDismissal
set to true
Implementation
bool get impliesAppBarDismissal => hasActiveRouteBelow || _entriesImpliesAppBarDismissal > 0;