code: def test_serialize_all_null_string():
      data = [None, None, None, None, None]
      pd_series = pd.Series(data, dtype="str")
      gd_series = cudf.Series(data, dtype="str")
  
      recreated = cudf.Series.deserialize(*gd_series.serialize())
      assert_eq(recreated, pd_series)
  
imports: import pickle
  import msgpack
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.testing import _utils
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 17 for calling a global function with example usage: test_serialize_all_null_string() without return types