code: def test_do_backward_log_pass(self):
      bwdlattice = _hmmc.backward_log(
          self.hmm.startprob_, self.hmm.transmat_, self.log_frameprob
      )
      refbwdlattice = np.array(
          [
              [0.0661, 0.0455],
              [0.0906, 0.1503],
              [0.4593, 0.2437],
              [0.6900, 0.4100],
              [1.0000, 1.0000],
          ]
      )
      assert_allclose(np.exp(bwdlattice), refbwdlattice, 4)
  
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  from scipy import special
  from hmmlearn.base import BaseHMM, ConvergenceMonitor
  from hmmlearn import _hmmc
label_desc: Use image node_id 5 for calling the TestBaseAgainstWikipedia obj's underlying member method code with example usage: obj.test_do_backward_log_pass() without return types