code: def test_constructor_dtypes_to_timedelta(self, cast_index, vals):
      if cast_index:
          index = Index(vals, dtype=object)
          assert isinstance(index, Index)
          assert index.dtype == object
      else:
          index = Index(vals)
          assert isinstance(index, TimedeltaIndex)
  
imports: from datetime import datetime, timedelta, timezone
  from decimal import Decimal
  import numpy
  import pytest
  from pandas._libs.tslibs.timezones import maybe_get_tz
  from pandas import NA, Categorical, CategoricalIndex, DatetimeIndex, Index, IntervalIndex, MultiIndex, NaT, PeriodIndex, Series, TimedeltaIndex, Timestamp, array, date_range, period_range, timedelta_range
  import pandas._testing
label_desc: Use image node_id 15 for calling the TestDtypeEnforced obj's underlying member method code with example usage: obj.test_constructor_dtypes_to_timedelta(cast_index, vals) without return types