code: def setup_class(cls):
      global atlas
      from networkx.generators import atlas
  
      cls.GAG = atlas.graph_atlas_g()
  
imports: import importlib.resources
  import os
  import random
  import struct
  import networkx
  from networkx.algorithms import isomorphism
label_desc: Use image node_id 1 for calling the TestAtlas obj's underlying member method code with example usage: obj.setup_class(cls) without return types