code: def test_dls_predecessor(self):
      assert nx.dfs_predecessors(self.G, source=0, depth_limit=3) == {
          1: 0,
          2: 1,
          3: 2,
          7: 2,
      }
      assert nx.dfs_predecessors(self.D, source=2, depth_limit=3) == {
          8: 7,
          9: 8,
          3: 2,
          7: 2,
      }
  
imports: import networkx
label_desc: Use image node_id 5 for calling the TestDepthLimitedSearch obj's underlying member method code with example usage: obj.test_dls_predecessor() without return types