public static T Instantiate <T> (this UNStoryboard storyboard, string name) where T : UNViewController => storyboard.InstantiateViewController(name) as T;
public static UNViewController Instantiate(this UNStoryboard storyboard, string name) => storyboard.InstantiateViewController(name) as UNViewController;
public static T Instantiate <T> (this UNStoryboard storyboard) where T : UNViewController => storyboard.InstantiateViewController(typeof(T).Name) as T;