Dart APIunself_appAnalyticRouteObserverdefaultRouteFilter defaultRouteFilter static method Null safety bool defaultRouteFilter(Route? route ) Implementation static bool defaultRouteFilter(Route<dynamic>? route) => route is PageRoute; unself_app unself_app AnalyticRouteObserver defaultRouteFilter 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