code: def test_iter_windows_list_texts(self):
      texts = [["this", "is", "a"], ["test", "document"]]
      windows = list(utils.iter_windows(texts, 2))
      list_windows = [list(iterable) for iterable in windows]
      expected = [["this", "is"], ["is", "a"], ["test", "document"]]
      self.assertListEqual(list_windows, expected)
  
imports: import logging
  import unittest
  import numpy
  from gensim import utils
  from gensim.test.utils import datapath, get_tmpfile
label_desc: Use image node_id 7 for calling the TestWindowing obj's underlying member method code with example usage: obj.test_iter_windows_list_texts() without return types