code: def setUpClass(cls) -> None:
      provider_uri = "Not necessary."
      init(
          region=REG_TW,
          provider_uri=provider_uri,
          expression_cache=None,
          dataset_cache=None,
          **cls._setup_kwargs,
      )
  
imports: from typing import Union, List, Dict, Tuple
  import unittest
  import pandas
  import numpy
  import io
  from .data import GetData
  from ..None import init
  from ..constant import REG_CN, REG_TW
  from qlib.data.filter import NameDFilter
  from qlib.data import D
  from qlib.data.data import Cal, DatasetD
  from qlib.data.storage import CalendarStorage, InstrumentStorage, FeatureStorage, CalVT, InstKT, InstVT
label_desc: Use image node_id 1 for calling the TestMockData obj's underlying member method code with example usage: obj.setUpClass(cls) without return types