code: def setup(self, dtype):
      lev = pd.Index(list("ABCDEFGHIJ"))
      ri = pd.Index(range(1000))
      mi = MultiIndex.from_product([lev, ri], names=["foo", "bar"])
  
      index = date_range(
          "2016-01-01", periods=10000, freq="s", tz="US/Pacific"
      )
      if dtype == "Period[s]":
          index = index.tz_localize(None).to_period("s")
  
      ser = pd.Series(index, index=mi)
      df = ser.unstack("bar")
      # roundtrips -> df.stack().equals(ser)
  
      self.ser = ser
      self.df = df
  
imports: from itertools import product
  import string
  import numpy
  import pandas
  from pandas import DataFrame, MultiIndex, date_range, melt, wide_to_long
  from pandas.api.types import CategoricalDtype
  from .pandas_vb_common import setup
label_desc: Use image node_id 1 for calling the ReshapeExtensionDtype obj's underlying member method code with example usage: obj.setup(dtype) without return types