code: def test_astype_array_fallback(self):
      obj = timedelta_range("1h", periods=2)
      result = obj.astype(bool)
      expected = Index(np.array([True, True]))
      tm.assert_index_equal(result, expected)
  
      result = obj._data.astype(bool)
      expected = np.array([True, True])
      tm.assert_numpy_array_equal(result, expected)
  
file_path: pandas/pandas/tests/indexes/timedeltas/methods/test_astype.py
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Index, NaT, Timedelta, TimedeltaIndex, timedelta_range
  import pandas._testing
  from pandas.core.arrays import TimedeltaArray
label_desc: Use image node_id 11 for calling the TestTimedeltaIndex obj's underlying member method code with example usage: obj.test_astype_array_fallback() without return types