code: def test_difference_sort(self, index, sort):
      first = index[5:20]
      second = index[:10]
  
      result = first.difference(second, sort)
      expected = index[10:20]
  
      if sort is None:
          expected = expected.sort_values()
  
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime
  import operator
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas.core.dtypes.cast import find_common_type
  from pandas import CategoricalDtype, CategoricalIndex, DatetimeTZDtype, Index, MultiIndex, PeriodDtype, RangeIndex, Series, Timestamp
  import pandas._testing
  from pandas.api.types import is_signed_integer_dtype, pandas_dtype
label_desc: Use image node_id 13 for calling the TestSetOpsUnsorted obj's underlying member method code with example usage: obj.test_difference_sort(index, sort) without return types