JSTree, is it possible to add a handle?

Question

I'm very interested in using JSTree for a Sortable list that allows for nesting.

The problem is, in my list items I want things like checkboxes, etc... which isn't possible because the entire list is draggable with JSTREE.

Is there a way to add a handler to JSTree so only when the handler is clicked the list is draggable? That would allow me to add all kinds of good stuff in the list that can be interacted with by the user.

http://www.jstree.com/

Thanks