code: def setup(self, orient):
      N = 10**5
      index = date_range("20000101", periods=N, freq="h")
      timedeltas = timedelta_range(start=1, periods=N, freq="s")
      datetimes = date_range(start=1, periods=N, freq="s")
      self.df = DataFrame(
          {
              "td_1": timedeltas,
              "td_2": timedeltas,
              "ts_1": datetimes,
              "ts_2": datetimes,
          },
          index=index,
      )
  
imports: import sys
  import numpy
  from pandas import DataFrame, Index, concat, date_range, json_normalize, read_json, timedelta_range
  from ..pandas_vb_common import BaseIO
  from ..pandas_vb_common import setup
label_desc: Use image node_id 1 for calling the ToJSONISO obj's underlying member method code with example usage: obj.setup(orient) without return types