code: def test_edge_attributes_are_still_mutable_on_frozen_graph(self):
      G = nx.freeze(nx.path_graph(3))
      edge = G.edges[(0, 1)]
      edge["edge_attribute"] = True
      assert edge["edge_attribute"] == True
  
imports: import random
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 21 for calling the TestFunction obj's underlying member method code with example usage: obj.test_edge_attributes_are_still_mutable_on_frozen_graph() without return types