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| // MARK: UIViewController | |
| extension UIViewController { | |
| static var topMost: UIViewController? { | |
| var top = UIApplication.shared.keyWindow?.rootViewController | |
| while true { | |
| if let presented = top?.presentedViewController { | |
| top = presented | |
| } else if let nav = top as? UINavigationController { | |
| top = nav.visibleViewController | |
| } else if let tab = top as? UITabBarController { |