goToUnknownPage method
Navigates to an unknown page.
Implementation
@override
Future<void> goToUnknownPage([bool clearPages = false]) async {
if (clearPages) {
_activePages.clear();
}
final PageSettings pageSettings = _buildPageSettings(notFoundRoute.name);
final RouteDecoder<T>? routeDecoder = _getRouteDecoder(pageSettings);
await _push(routeDecoder!);
}