gdk:drag-drop-done (drag success)

drag -- a gdk:drag object
success -- a boolean whether the drag was ultimatively successful

Inform GDK if the drop ended successfully. Passing false for success may trigger a drag cancellation animation. This function is called by the drag source, and should be the last call before dropping the reference to the drag object.

The gdk:drag object will only take the first call of this function as effective, if this function is called multiple times, all subsequent calls will be ignored.