code: def test_summary(self):
      self.result.summary()
  
imports: import os
  import warnings
  import numpy
  from numpy.testing import assert_allclose, assert_raises
  import pandas
  import pytest
  from statsmodels.tsa.regime_switching import markov_switching, markov_regression
label_desc: Use image node_id 2 for calling the MarkovRegression obj's underlying member method code with example usage: obj.test_summary() without return types