[Paraview] using tree widgets

[Mark Olesen]

I'm currently using an ArraySelectionDomain to select items from (a very long)  list of mesh-parts (string names) as per http://www.paraview.org/Wiki/ParaView/Plugin_HowTo#Drop_down_list_with_values_from_input_file

It would be quite helpful if I could structure my list and use a tree-selection, but AFICT the closest thing might be a CompositeTreeDomain, but either this doesn't actually fit or I haven't figured out how to make it work.

Is this realistic to attempt?
/mark