code: def test_plot_simultaneous_ci(self, close_figures):
      self.res._simultaneous_ci()
      reference = self.res.groupsunique[1]
      self.res.plot_simultaneous(comparison_name=reference)
  
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 5 for calling the CheckTuckeyHSDMixin obj's underlying member method code with example usage: obj.test_plot_simultaneous_ci(close_figures) without return types