code: def test_map_box_dt64tz(unit):
      vals = [
          pd.Timestamp("2011-01-01", tz="US/Eastern"),
          pd.Timestamp("2011-01-02", tz="US/Eastern"),
      ]
      ser = Series(vals).dt.as_unit(unit)
      assert ser.dtype == f"datetime64[{unit}, US/Eastern]"
      res = ser.map(lambda x: f"{type(x).__name__}_{x.day}_{x.tz}")
      exp = Series(["Timestamp_1_US/Eastern", "Timestamp_2_US/Eastern"])
      tm.assert_series_equal(res, exp)
  
imports: from collections import Counter, defaultdict
  from decimal import Decimal
  import math
  import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, bdate_range, date_range, isna, timedelta_range
  import pandas._testing
label_desc: Use image node_id 37 for calling a global function with example usage: test_map_box_dt64tz(unit) without return types