code: def test_categorial_datetimelike(self, method):
      i = CategoricalIndex(
          [Timestamp("1999-12-31"), Timestamp("2000-12-31")]
      )
  
      result = method(i)[0]
      assert isinstance(result, Timestamp)
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.dtypes import DatetimeTZDtype
  import pandas
  from pandas import CategoricalIndex, Series, Timedelta, Timestamp, date_range
  import pandas._testing
  from pandas.core.arrays import DatetimeArray, IntervalArray, NumpyExtensionArray, PeriodArray, SparseArray, TimedeltaArray
  from pandas.core.arrays.string_arrow import ArrowStringArrayNumpySemantics
label_desc: Use image node_id 5 for calling the TestToIterable obj's underlying member method code with example usage: obj.test_categorial_datetimelike(method) without return types