createRoute method
Creates the Route that corresponds to this page.
The created Route must have its Route.settings property set to this Page.
Implementation
@override
Route<T> createRoute(BuildContext context) {
return PageRouteBuilder<T>(
settings: this,
pageBuilder: (_, _, _) => child,
transitionDuration: Duration.zero,
reverseTransitionDuration: Duration.zero,
);
}