code: def test_nonisomorphic_trees(self):
      def f(x):
          return list(nx.nonisomorphic_trees(x))
  
      assert edges_equal(f(3)[0].edges(), [(0, 1), (0, 2)])
      assert edges_equal(f(4)[0].edges(), [(0, 1), (0, 3), (1, 2)])
      assert edges_equal(f(4)[1].edges(), [(0, 1), (0, 2), (0, 3)])
  
file_path: networkx/networkx/generators/tests/test_nonisomorphic_trees.py
imports: import networkx
  from networkx.utils import edges_equal
label_desc: Use image node_id 4 for calling the TestGeneratorNonIsomorphicTrees obj's underlying member method code with example usage: obj.test_nonisomorphic_trees() and returns: list