code: def test_dls_edges(self):
      edges = nx.dfs_edges(self.G, source=9, depth_limit=4)
      assert list(edges) == [
          (9, 8),
          (8, 7),
          (7, 2),
          (2, 1),
          (2, 3),
          (9, 10),
      ]
  
imports: import networkx
label_desc: Use image node_id 7 for calling the TestDepthLimitedSearch obj's underlying member method code with example usage: obj.test_dls_edges() without return types