From an email thread:
Jerry, does the LINE context variable work with the tree component? Could it? Or would it be appropriate to have one called NODE or some such that serves a similar function? I can think of several places where this would have helped me, but I didn't know about LINE at all before your Kuali Days session.
Hey Peter, No that is only exported for collection groups. We could do something for trees. Maybe export a 'node' variable that has the data object for the current node?