I am trying to organize a usd where all primitives containers are xforms so I can easily change them with configure primitive LOP using expressions.
Taking in consideration this tree:

/House
-/Door
--/Door Nob 1
---/mesh_0
--/Door Nob 2
---/mesh_0
-/Bed
--/Mattress
---/mesh_0

How can I target primitives that only has one descendant or the ones that contains the mesh through expressions?
I know that I have the "Descendant" number for each primitive, can I use that to target my selections? If so how?

I hope my graph makes sense.

Thanks.

I figured it out!

Just in case someone needs it.

Just type that on the pattern match and boom:
%parents(%type:Mesh)