code: def test_topic_model(self):
      actual = get_visible_items(turicreate.topic_model)
      expected = ["TopicModel", "create", "perplexity"]
      check_visible_modules(actual, expected)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import turicreate
label_desc: Use image node_id 8 for calling the ModuleVisibilityTests obj's underlying member method code with example usage: obj.test_topic_model() without return types