code: def test_deserialize_old_graph():
      num_nodes = 100
      num_edges = 200
      path = os.path.join(
          os.path.dirname(__file__), "data/graph_0.9a220622.dgl"
      )
      g_list, _ = dgl.load_graphs(path)
      g = g_list[0]
      assert "coo" in g.formats()["created"]
      assert "csr" in g.formats()["not created"]
      assert "csc" in g.formats()["not created"]
      assert num_nodes == g.num_nodes()
      assert num_edges == g.num_edges()
  
imports: import os
  import tempfile
  import time
  import unittest
  import warnings
  import backend
  import dgl
  import dgl.ndarray
  import numpy
  import pytest
  import scipy
  from dgl.data.utils import load_labels, load_tensors, save_tensors
label_desc: Use image node_id 19 for calling a global function with example usage: test_deserialize_old_graph() without return types