code: def test_subclass(self):
      class MyGraph(nx.DiGraph):
          def my_method(self):
              return "me"
  
          def to_directed_class(self):
              return MyGraph()
  
      M = MyGraph()
      M.add_edge(1, 2)
      RM = nx.reverse_view(M)
      print("RM class", RM.__class__)
      RMC = RM.copy()
      print("RMC class", RMC.__class__)
      print(RMC.edges)
      assert RMC.has_edge(2, 1)
      assert RMC.my_method() == "me"
  
imports: import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 6 for calling the TestReverseView obj's underlying member method code with example usage: obj.test_subclass() and returns: str, MyGraph