code: def setup_class(cls):
      cls.Gnp = nx.gnp_random_graph(20, 0.8, seed=42)
      cls.Anp = _AntiGraph(nx.complement(cls.Gnp))
      cls.Gd = nx.davis_southern_women_graph()
      cls.Ad = _AntiGraph(nx.complement(cls.Gd))
      cls.Gk = nx.karate_club_graph()
      cls.Ak = _AntiGraph(nx.complement(cls.Gk))
      cls.GA = [(cls.Gnp, cls.Anp), (cls.Gd, cls.Ad), (cls.Gk, cls.Ak)]
  
imports: import pytest
  import networkx
  from networkx.algorithms.approximation import k_components
  from networkx.algorithms.approximation.kcomponents import _AntiGraph, _same
label_desc: Use image node_id 1 for calling the TestAntiGraph obj's underlying member method code with example usage: obj.setup_class(cls) without return types