code: def setup_class(cls):
      global atlas
      from networkx.generators import atlas
  
      cls.GAG = atlas.graph_atlas_g()
  
file_path: networkx/networkx/algorithms/tests/test_graphical.py
imports: import pytest
  import networkx
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