Treeview/Drag n' drog pre-lighting

[Lee Willis <lee leewillis co uk>]

Is there any way to get pre-lighting of particular rows in a treeview
when hovering a drag 'n drop over the Treeview reflecting which row will
be the drop target?

>From everything I've found through the API docs, and google, this isn't
possible, and it isn't mentioned on the plans for 2.6 at http://www.gtk.
org/plan/2.6/.

So, is it already there? Is it already there? Would a patch implementing
it be accepted - or are there issues that would prevent it going in?

Lee