A object that provides route information through the RouteInformationProvider.value and notifies its listener when its value changes.
This object will be used by the underlying Router.
If this is not provided, the widgets app will create a PlatformRouteInformationProvider with initial route name equal to the dart:ui.PlatformDispatcher.defaultRouteName by default.
- Router.routeInformationProvider, which receives this object when this widget builds the Router.
final RouteInformationProvider? routeInformationProvider;