code: def test_line_inverse_line_dgm(self):
      G = nx.dorogovtsev_goltsev_mendes_graph(4)
      H = nx.line_graph(G)
      J = nx.inverse_line_graph(H)
      assert nx.is_isomorphic(G, J)
  
imports: import pytest
  import networkx
  from networkx.generators import line
  from networkx.utils import edges_equal
label_desc: Use image node_id 19 for calling the TestGeneratorInverseLine obj's underlying member method code with example usage: obj.test_line_inverse_line_dgm() without return types