code: def setup_class_(cls):
      cls.mc = MultiComparison(cls.endog, cls.groups)
      cls.res = cls.mc.tukeyhsd(alpha=cls.alpha)
  
imports: from statsmodels.compat.python import asbytes
  from io import BytesIO
  import warnings
  import numpy
  import pandas
  import pytest
  from numpy.testing import assert_, assert_allclose, assert_almost_equal, assert_equal, assert_raises
  from statsmodels.stats.libqsturng import qsturng
  from statsmodels.stats.multicomp import tukeyhsd, pairwise_tukeyhsd, MultiComparison
label_desc: Use image node_id 1 for calling the CheckTuckeyHSDMixin obj's underlying member method code with example usage: obj.setup_class_(cls) without return types