Dart APIunself_appAnalyticRouteObserverdefaultNameExtractor defaultNameExtractor static method Null safety String? defaultNameExtractor(RouteSettings settings ) Implementation static String? defaultNameExtractor(RouteSettings settings) => settings.name; unself_app unself_app AnalyticRouteObserver defaultNameExtractor static method AnalyticRouteObserver class Constructors AnalyticRouteObserver Properties analytic hashCode nameExtractor navigator routeFilter runtimeType Methods debugObservingRoute didPop didPush didRemove didReplace didStartUserGesture didStopUserGesture noSuchMethod subscribe toString unsubscribe Operators operator == Static methods defaultNameExtractor defaultRouteFilter