Dart APIunself_appAppRouterdefaultNavigator defaultNavigator property Null safety GlobalKey<NavigatorState> defaultNavigator final Implementation static final defaultNavigator = GlobalKey<NavigatorState>(debugLabel: 'AppRouter'); unself_app unself_app AppRouter defaultNavigator property AppRouter class Constructors AppRouter Properties hashCode runtimeType Methods noSuchMethod toString Operators operator == Static properties defaultLocation defaultNavigator defaultRoutes Static methods build