docstr: Tests that vectors are different after burn-in.
code: def test_burn_in(self):
      """Tests that vectors are different after burn-in."""
      model = PoincareModel(self.data, burn_in=1, negative=3)
      original_vectors = np.copy(model.kv.vectors)
      model.train(epochs=0)
      self.assertFalse(np.allclose(model.kv.vectors, original_vectors))
  
imports: import logging
  import os
  import tempfile
  import unittest
  import numpy
  from gensim.models.poincare import PoincareRelations, PoincareModel, PoincareKeyedVectors
  from gensim.test.utils import datapath
label_desc: Use image node_id 19 for calling the TestPoincareModel obj's underlying member method code with example usage: obj.test_burn_in() without return types