code: def setup_class(cls, missing="all", *args, **kwargs):
      super().setup_class(missing=missing, *args, **kwargs)
  
imports: import os
  import numpy
  from numpy.testing import assert_allclose
  import pandas
  from scipy.linalg import cho_solve_banded
  from statsmodels import datasets
  from statsmodels.tsa.statespace import sarimax, structural, dynamic_factor, varmax
label_desc: Use image node_id 1 for calling the TestDFMAllMissing obj's underlying member method code with example usage: obj.setup_class(cls, missing) without return types