code: def test_round_trip_integer_nodes(self):
      G = nx.complete_graph(3)
      A = nx.nx_agraph.to_agraph(G)
      H = nx.nx_agraph.from_agraph(A)
      assert graphs_equal(G, H)
  
imports: import warnings
  import pytest
  import networkx
  from networkx.utils import edges_equal, graphs_equal, nodes_equal
label_desc: Use image node_id 20 for calling the TestAGraph obj's underlying member method code with example usage: obj.test_round_trip_integer_nodes() without return types