code: def test_fit_lambdas(self, implementation):
      self.test_fit(implementation, "l")
  
file_path: hmmlearn/lib/hmmlearn/tests/test_poisson_hmm.py
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  from sklearn.utils import check_random_state
  from hmmlearn import hmm
  from .None import assert_log_likelihood_increasing, normalized
label_desc: Use image node_id 5 for calling the TestPoissonHMM obj's underlying member method code with example usage: obj.test_fit_lambdas(implementation) without return types