code: def test_float64_unit_conversion(self):
      # GH#23539
      tdi = to_timedelta([1.5, 2.25], unit="D")
      expected = TimedeltaIndex(
          [Timedelta(days=1.5), Timedelta(days=2.25)]
      )
      tm.assert_index_equal(tdi, expected)
  
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 9 for calling the TestTimedeltaIndex obj's underlying member method code with example usage: obj.test_float64_unit_conversion() without return types