code: def setup_class(cls):
      x = [
          np.array(
              [
                  452.0,
                  874.0,
                  554.0,
                  447.0,
                  356.0,
                  754.0,
                  558.0,
                  574.0,
                  664.0,
                  682.0,
                  547.0,
                  435.0,
                  245.0,
              ]
          ),
          np.array(
              [
                  546.0,
                  547.0,
                  774.0,
                  465.0,
                  459.0,
                  665.0,
                  467.0,
                  365.0,
                  589.0,
                  534.0,
                  456.0,
                  651.0,
                  654.0,
                  665.0,
                  546.0,
                  537.0,
              ]
          ),
          np.array(
              [
                  785.0,
                  458.0,
                  886.0,
                  536.0,
                  669.0,
                  857.0,
                  821.0,
                  772.0,
                  732.0,
                  689.0,
                  654.0,
                  597.0,
                  830.0,
                  827.0,
              ]
          ),
      ]
  
      cls.x = x
      cls.get_results()
  
imports: import numpy
  from numpy.testing import assert_equal, assert_allclose, assert_raises
  import pytest
  from statsmodels.stats.robust_compare import TrimmedMean, trim_mean, trimboth
  import statsmodels.stats.oneway
  from statsmodels.tools.testing import Holder
  from scipy.stats import trim1
label_desc: Use image node_id 1 for calling the TestTrimmedRAnova obj's underlying member method code with example usage: obj.setup_class(cls) without return types