What Relatinship between ProductOccurrences and conversion result of mesh that in glb?

Hi,
In the CAD files to glb conversion, is there any relationship between ProductOccurrences and the number of meshes created under the group named Productoccurrences in the glb?
I roughly counted the number of TopoBrepData, Connex, Shell and it was not enough and the number of Faces was too much. I was wondering which datastructure the mesh units in the glb correspond to in Hoops Exchange.

like


slide(product occurrences) → mesh_1, mesh_1_1 …(count not matched connex or shell what data does matched count?)