onExitFullscreen property Null safety

(void Function?(InAppWebViewController controller)?) onExitFullscreen
final

Event fired when the current page has exited full screen mode.

Official Android API: https://developer.android.com/reference/android/webkit/WebChromeClient#onHideCustomView()

Official iOS API: https://developer.apple.com/documentation/uikit/uiwindow/1621617-didbecomehiddennotification

Implementation

final void Function(InAppWebViewController controller)? onExitFullscreen;