code: def test_node_not_in_graph(self):
      for G, A in self.GA:
          node = "non_existent_node"
          pytest.raises(nx.NetworkXError, A.neighbors, node)
          pytest.raises(nx.NetworkXError, G.neighbors, node)
  
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 9 for calling the TestAntiGraph obj's underlying member method code with example usage: obj.test_node_not_in_graph() without return types