[chimerax-users] Adding models as a group/subgroup using Python

I tried to read the Programming API but was unable to find out. Right now: I created surface A1,A2,B1,B2,D1,D2, etc.. I added these surfaces in a list surfs = [] surfs.append(A1) surfs.append(A2) ... surfs.append(D2) session.models.add_group(surfs, name="All surface") This make A1,A2 as models #1.1,#1.2 etc Interestingly, I cannot even find the document for add_group. I learned this from ChimeraX recipes. Anyway, I want to organize the data a bit better to have it like this #1; Surface ---> #1.1 Surf A -------> #1.1.1 A1 -------> #1.1.2 A2 ---> #1.2 Surf B -------> #1.2.1 B1 -------> #1.2.2 B1 How can we do that? Best,