code: def setUpClass(cls):
      cls.data = sample_data
      cls.data.ta.cores = cores
      cls.speed_test = DataFrame()
  
imports: from multiprocessing import cpu_count
  from time import perf_counter
  from .config import sample_data
  from .context import pandas_ta
  from unittest import skip, skipUnless, TestCase
  from pandas import DataFrame
label_desc: Use image node_id 1 for calling the TestStrategyMethods obj's underlying member method code with example usage: obj.setUpClass(cls) without return types