code: def test_pickle_roundtrip(self, index):
      result = tm.round_trip_pickle(index)
      tm.assert_index_equal(result, index, exact=True)
      if result.nlevels > 1:
          # GH#8367 round-trip with timezone
          assert index.equal_levels(result)
  
imports: import re
  import numpy
  import pytest
  from pandas.errors import InvalidIndexError
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestRoundTrips obj's underlying member method code with example usage: obj.test_pickle_roundtrip(index) without return types