code: def test_difference_object_type(self, diff_type, expected):
      # GH 13432
      idx1 = Index([0, 1, "A", "B"])
      idx2 = Index([0, 2, "A", "C"])
      result = getattr(idx1, diff_type)(idx2)
      expected = Index(expected)
      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 18 for calling the TestIndexSetOps obj's underlying member method code with example usage: obj.test_difference_object_type(diff_type, expected) without return types