Actually, I just figured out that the top-level parent is set to the root folder id, so I can use that to tell what level I'm at (as long as I'm sticking with only two levels). But I have no clue whatsoever about how to use that information to set up list-builder to group and sort the rows properly, and I haven't been able to find an example of anything like this. Maybe I'm just being dense (wouldn't be the first time :). Did Project Manager use list-builder to accomplish this?
