The user performed the drop action. This event does not indicate
acceptance, wl_data_source.cancelled may still be emitted afterwards
if the drop destination does not accept any mime type.
However, this event might however not be received if the compositor
cancelled the drag-and-drop operation before this event could happen.
Note that the data_source may still be used in the future and should
not be destroyed here.
the drag-and-drop operation physically finished
The user performed the drop action. This event does not indicate acceptance, wl_data_source.cancelled may still be emitted afterwards if the drop destination does not accept any mime type.
However, this event might however not be received if the compositor cancelled the drag-and-drop operation before this event could happen.
Note that the data_source may still be used in the future and should not be destroyed here.