code: def test_intersection_non_monotonic_non_unique(
      self, index2, expected_arr, sort
  ):
      # non-monotonic non-unique
      index1 = Index(["A", "B", "A", "C"])
      expected = Index(expected_arr)
      result = index1.intersection(Index(index2), sort=sort)
      if sort is None:
          expected = expected.sort_values()
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime
  import numpy
  import pytest
  import pandas
  from pandas import Index, Series
  import pandas._testing
  from pandas.core.algorithms import safe_sort
label_desc: Use image node_id 13 for calling the TestIndexSetOps obj's underlying member method code with example usage: obj.test_intersection_non_monotonic_non_unique(index2, expected_arr, sort) without return types