Reorder: how to detect item drop?

[warm-tune]

So Reorder.Group.onReorder method calls every time item changes its position during the drag. But that doesn't mean that DnD is finished. If I continue drag from the beginning of the list to its end - I will see multiple onReorder calls. So, I cannot use onReorder as a trigger for issues a api request call.

My question is: how to reliably detect that item reached its final destination after all reorder events, and dropped, so I can persist new state of elements on the server via api call?

Thanks.