didPush method
The Navigator pushed route.
The route immediately below that one, and thus the previously active
route, is previousRoute.
Implementation
@override
void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
_history.add(route);
_poppedRoutes.remove(route);
_historyChangeStreamController.add(RxGoHistoryChange(
action: RxGoNavigationStackAction.push,
newRoute: route,
oldRoute: previousRoute,
));
}