code: def test_pickle_roundtrip(dtype):
      # GH 42600
      pytest.importorskip("pyarrow")
      expected = pd.Series(range(10), dtype=dtype)
      expected_sliced = expected.head(2)
      full_pickled = pickle.dumps(expected)
      sliced_pickled = pickle.dumps(expected_sliced)
  
      assert len(full_pickled) > len(sliced_pickled)
  
      result = pickle.loads(full_pickled)
      tm.assert_series_equal(result, expected)
  
      result_sliced = pickle.loads(sliced_pickled)
      tm.assert_series_equal(result_sliced, expected_sliced)
  
imports: import pickle
  import re
  import numpy
  import pytest
  import pandas.util._test_decorators
  import pandas
  import pandas._testing
  from pandas.core.arrays.string_ import StringArray, StringDtype
  from pandas.core.arrays.string_arrow import ArrowStringArray, ArrowStringArrayNumpySemantics
label_desc: Use image node_id 12 for calling a global function with example usage: test_pickle_roundtrip(dtype) without return types