Override drop location while hovering

[lkesteloot]

In my app I need to modify the drop position. If the item is hovering over position X, I need to say that the item will really drop in position Y, and have item Y open up so that it's visually clear to the user that this will happen.

iOS UITableView supports this with this delegate method.

Note that this is different than just disabling drop at location X. I have items in groups, and position Y will always be in the same group as X. If I just disable drop at X then the open row could be in a different group, which is misleading and frustrating to the user.

I looked through the API and can't find this functionality in this library. Does anyone have hints for how I might add it?