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Safe access to the `keyWindow` for iOS 13+ support of multiple UIScene
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| let keyWindow = UIApplication.shared.connectedScenes | |
| .filter { $0.activationState == .foregroundActive } | |
| .map { $0 as? UIWindowScene } | |
| .compactMap { $0 } | |
| .first?.windows | |
| .filter { $0.isKeyWindow } | |
| .first | |
| // Usage e.g. | |
| _ = keyWindow?.safeAreaInsets.bottom ?? 0 |
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