Informs the drag source that the drop is finished, and that the data of the drag will no longer be required.
the drag context
a flag indicating whether the drop was successful
a flag indicating whether the source should delete the original data. (This should be true for a move)
the timestamp from the #GtkWidget::drag-drop signal
Informs the drag source that the drop is finished, and that the data of the drag will no longer be required.