confirmDismiss property
final
Gives the app an opportunity to confirm or veto a pending dismissal.
The widget cannot be dragged again until the returned future resolves.
If the returned Future<bool> completes true, then this widget will be
dismissed, otherwise it will be moved back to its original location.
If the returned Future<bool?> completes to false or null the onResize
and onDismissed callbacks will not run.
Implementation
final ConfirmDismissCallback? confirmDismiss;