code: def test_difference_sort_incomparable():
      # GH-24959
      idx = MultiIndex.from_product(
          [[1, pd.Timestamp("2000"), 2], ["a", "b"]]
      )
  
      other = MultiIndex.from_product(
          [[3, pd.Timestamp("2000"), 4], ["c", "d"]]
      )
      # sort=None, the default
      msg = "sort order is undefined for incomparable objects"
      with tm.assert_produces_warning(RuntimeWarning, match=msg):
          result = idx.difference(other)
      tm.assert_index_equal(result, idx)
  
      # sort=False
      result = idx.difference(other, sort=False)
      tm.assert_index_equal(result, idx)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import CategoricalIndex, DataFrame, Index, IntervalIndex, MultiIndex, Series
  import pandas._testing
  from pandas.api.types import is_float_dtype, is_unsigned_integer_dtype
label_desc: Use image node_id 11 for calling a global function with example usage: test_difference_sort_incomparable() without return types