code: def test_iter_box_dt64(self, unit):
      vals = [Timestamp("2011-01-01"), Timestamp("2011-01-02")]
      ser = Series(vals).dt.as_unit(unit)
      assert ser.dtype == f"datetime64[{unit}]"
      for res, exp in zip(ser, vals):
          assert isinstance(res, Timestamp)
          assert res.tz is None
          assert res == exp
          assert res.unit == unit
  
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 6 for calling the TestToIterable obj's underlying member method code with example usage: obj.test_iter_box_dt64(unit) without return types