code: def test_pickle(self, history):
      loaded = pickle.loads(pickle.dumps(history))
  
      # The store cannot be pickled, so it is set to None
      if not hasattr(history, "store"):
          assert history.to_list() == loaded.to_list()
      else:
          assert loaded.store is None
  
imports: import pickle
  import time
  import multiprocessing
  from functools import partial
  import numpy
  import pytest
  import torch
  from torch.distributed import TCPStore
  from sklearn.datasets import make_classification
label_desc: Use image node_id 34 for calling the TestHistory obj's underlying member method code with example usage: obj.test_pickle(history) without return types