Source list group item indentation

FROM : Kyle Sluder
DATE : Fri Jan 11 15:16:37 2008

Howdy list,

Trying to implement an NSOutlineView as source list.  Everything works
fine, except that I have group items that I don't want to be
expandable.  Even if I tell the list view they're not expandable, they
still appear indented.  What do I have to do to make them flush-left
with the inside of the outline view, like the Library and Store items
in the iTunes source list?

Thanks,
--Kyle Sluder