How to show drop-able area

Hi

I have been using this plugin for item sorting this is really great,
I wanted to show the drop zone area, like a border round the area where i want to drop the element / item.

Thanks

Review the repository's sortable and drag-and-drop documentation and public API to determine whether a drop-zone indicator is currently supported. Clarify the expected visual behavior and integration point before estimating the change; done should include a documented way to show the intended drop area during sorting.

Written by the indexing model from the issue text.