code: def test_large_mmap(self):
      fname = get_tmpfile("gensim_models_lda.tst")
      model = self.model
  
      # simulate storing large arrays separately
      model.save(fname, sep_limit=0)
  
      # test loading the large model arrays with mmap
      model2 = self.class_.load(fname, mmap="r")
      self.assertEqual(model.num_topics, model2.num_topics)
      self.assertTrue(isinstance(model2.expElogbeta, np.memmap))
      self.assertTrue(
          np.allclose(model.expElogbeta, model2.expElogbeta)
      )
      tstvec = []
      self.assertTrue(np.allclose(model[tstvec], model2[tstvec]))
  
imports: import logging
  import numbers
  import os
  import unittest
  import copy
  import numpy
  from numpy.testing import assert_allclose
  from gensim.corpora import mmcorpus, Dictionary
  from gensim.models import ldamodel, ldamulticore
  from gensim import matutils, utils
  from gensim.test import basetmtests
  from gensim.test.utils import datapath, get_tmpfile, common_texts
label_desc: Use image node_id 17 for calling the TestLdaModel obj's underlying member method code with example usage: obj.test_large_mmap() without return types