code: def test_large_mmap(self):
      fname = get_tmpfile("gensim_models_nmf.tst")
  
      # simulate storing large arrays separately
      self.model.save(fname, sep_limit=0)
  
      # test loading the large model arrays with mmap
      model2 = nmf.Nmf.load(fname, mmap="r")
      self.assertEqual(self.model.num_topics, model2.num_topics)
      tstvec = []
      self.assertTrue(np.allclose(self.model[tstvec], model2[tstvec]))
  
imports: import unittest
  import copy
  import logging
  import numbers
  import numpy
  from gensim import matutils
  from gensim.models import nmf
  from gensim.test import basetmtests
  from gensim.test.utils import datapath, get_tmpfile, common_corpus, common_dictionary
label_desc: Use image node_id 11 for calling the TestNmf obj's underlying member method code with example usage: obj.test_large_mmap() without return types