code: def test_filter_output(self, **kwargs):
      res = self.result
      assert_allclose(
          res.filtered_joint_probabilities,
          fedfunds_const_filtered_joint_probabilities,
      )
  
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 TestFedFundsConst obj's underlying member method code with example usage: obj.test_filter_output() without return types