code: def test_maybe_convert_i8_numeric_identical(
      self, make_key, any_real_numpy_dtype
  ):
      # GH 20636
      breaks = np.arange(5, dtype=any_real_numpy_dtype)
      index = IntervalIndex.from_breaks(breaks)
      key = make_key(breaks)
  
      # test if _maybe_convert_i8 won't change key if an Interval or IntervalIndex
      result = index._maybe_convert_i8(key)
      assert result is key
  
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 16 for calling the TestIntervalIndex obj's underlying member method code with example usage: obj.test_maybe_convert_i8_numeric_identical(make_key, any_real_numpy_dtype) without return types