code: def test_is_monotonic_with_nans(self):
      # GH#41831
      index = IntervalIndex([np.nan, np.nan])
  
      assert not index.is_monotonic_increasing
      assert not index._is_strictly_monotonic_increasing
      assert not index.is_monotonic_increasing
      assert not index._is_strictly_monotonic_decreasing
      assert not index.is_monotonic_decreasing
  
imports: from itertools import permutations
  import re
  import numpy
  import pytest
  import pandas
  from pandas import Index, Interval, IntervalIndex, Timedelta, Timestamp, date_range, interval_range, isna, notna, timedelta_range
  import pandas._testing
  import pandas.core.common
label_desc: Use image node_id 12 for calling the TestIntervalIndex obj's underlying member method code with example usage: obj.test_is_monotonic_with_nans() without return types