onDismiss property Null safety
The handler for SemanticsAction.dismiss.
This is a request to dismiss the currently focused node.
TalkBack users on Android can trigger this action in the local context menu, and VoiceOver users on iOS can trigger this action with a standard gesture or menu option.
Implementation
VoidCallback? get onDismiss => _onDismiss;
Implementation
set onDismiss(VoidCallback? value) {
_addArgumentlessAction(SemanticsAction.dismiss, value!);
_onDismiss = value;
}