code: def test_K5(self):
      G = nx.complete_graph(5)
      self.test(G, 0, 1, [2, 3, 4])
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 2 for calling the TestCommonNeighbors obj's underlying member method code with example usage: obj.test_K5() without return types