code: def test_get_index_non_unique_non_monotonic(self):
      # GH#44084 (root cause)
      index = IntervalIndex.from_tuples(
          [(0.0, 1.0), (1.0, 2.0), (0.0, 1.0), (1.0, 2.0)]
      )
  
      result, _ = index.get_indexer_non_unique([Interval(1.0, 2.0)])
      expected = np.array([1, 3], dtype=np.intp)
      tm.assert_numpy_array_equal(result, expected)
  
imports: import re
  import numpy
  import pytest
  from pandas.errors import InvalidIndexError
  from pandas import NA, CategoricalIndex, DatetimeIndex, Index, Interval, IntervalIndex, MultiIndex, NaT, Timedelta, Timestamp, array, date_range, interval_range, isna, period_range, timedelta_range
  import pandas._testing
label_desc: Use image node_id 12 for calling the TestGetIndexer obj's underlying member method code with example usage: obj.test_get_index_non_unique_non_monotonic() without return types