public SpringFacesFactories(FacesViewStateHandler facesViewStateHandler,
DestinationViewResolver destinationViewResolver) {
Assert.notNull(facesViewStateHandler, "FacesViewStateHandler must not be null");
Assert.notNull(destinationViewResolver, "DestinationViewResolver must not be null");
this.facesViewStateHandler = facesViewStateHandler;
this.navigationOutcomeResolver = new ImplicitNavigationOutcomeResolver();
this.destinationViewResolver = destinationViewResolver;
}