code: def test_int64_nocopy(self):
      # GH#23539 check that a copy isn't made when we pass int64 data
      #  and copy=False
      arr = np.arange(10, dtype=np.int64)
      tdi = TimedeltaIndex(arr, copy=False)
      assert tdi._data._ndarray.base is arr
  
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Timedelta, TimedeltaIndex, timedelta_range, to_timedelta
  import pandas._testing
  from pandas.core.arrays.timedeltas import TimedeltaArray
label_desc: Use image node_id 4 for calling the TestTimedeltaIndex obj's underlying member method code with example usage: obj.test_int64_nocopy() without return types