https://developer.apple.com/videos/play/wwdc2019/224/ - isModalInPresentation ◦ https://developer.apple.com/documentation/uikit/uiviewcontroller/3229894-ismodalinpresentation - presentationControllerDidAttemptToDismiss ◦ https://developer.apple.com/documentation/uikit/uiadaptivepresentationcontrollerdelegate/322 9888-presentationcontrollerdidattempt?language=objc - Human Interface Guidelines ◦ https://developer.apple.com/design/human-interface-guidelines/ios/app-architecture/modality/