How do you get a reference to your Scene Delegate (UIWindowSceneDelegate) as you would with your AppDelegate (UIApplicationDelegate)? [duplicate]

Question

Prior to iOS 13, when AppDelegate was king, you could do (well you still can) UIApplication.shared.delegate to get a reference to your AppDelegate. But how do you get a reference to your UIWindowSceneDelegate that manages a single window scene in iOS 13? UIWindowScene.shared.delegate doesn't exist, obviously.