docstr: Test most_similar returns handles restrict_vocab correctly.
code: def test_most_similar_restrict_vocab(self):
      """Test most_similar returns handles restrict_vocab correctly."""
      expected = set(self.vectors.index_to_key[:5])
      predicted = set(
          result[0]
          for result in self.vectors.most_similar(
              "dog.n.01", topn=5, restrict_vocab=5
          )
      )
      self.assertEqual(expected, predicted)
  
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 5 for calling the TestPoincareKeyedVectors obj's underlying member method code with example usage: obj.test_most_similar_restrict_vocab() without return types