extension UIViewController
{
    static func instantiate<ViewController: UIViewController>(_ storyboardName: UIStoryboard.Name,
                                                              _ viewControllerType: ViewController.Type) -> ViewController
    {
        let storyboard = UIStoryboard(name: storyboardName.rawValue, bundle: nil)
        return storyboard.instantiateViewController(withIdentifier: String(describing: ViewController.self)) as! ViewController
    }
}