setNewRoutePath method
Called by the Router when the Router.routeInformationProvider reports that a new route has been pushed to the application by the operating system.
Consider using a SynchronousFuture if the result can be computed synchronously, so that the Router does not need to wait for the next microtask to schedule a build.
Implementation
@override
Future<void> setNewRoutePath(RouteConfig configuration) async {
if (configuration.currentPage == null) {
//404
configuration = RouteConfig(
currentTreeBranch: [notFoundRoute], location: '/404', state: null);
}
await _pushHistory(configuration);
}