code: def test_expected_durations(self):
      assert_allclose(
          self.result.expected_durations,
          expected_durations,
          rtol=1e-5,
          atol=1e-7,
      )
  
imports: import warnings
  import os
  import numpy
  from numpy.testing import assert_equal, assert_allclose
  import pandas
  import pytest
  from statsmodels.tools import add_constant
  from statsmodels.tsa.regime_switching import markov_autoregression
label_desc: Use image node_id 5 for calling the TestHamiltonAR1SwitchTVTP obj's underlying member method code with example usage: obj.test_expected_durations() without return types