code: def test_graphviz_alias(self):
      G = self.build_graph(nx.Graph())
      pos_graphviz = nx.nx_agraph.graphviz_layout(G)
      pos_pygraphviz = nx.nx_agraph.pygraphviz_layout(G)
      assert pos_graphviz == pos_pygraphviz
  
imports: import warnings
  import pytest
  import networkx
  from networkx.utils import edges_equal, graphs_equal, nodes_equal
label_desc: Use image node_id 21 for calling the TestAGraph obj's underlying member method code with example usage: obj.test_graphviz_alias() without return types