code: def test_merge(self):
      d = Dictionary(self.texts)
      f = Dictionary(self.texts[:3])
      g = Dictionary(self.texts[3:])
  
      f.merge_with(g)
      self.assertEqual(
          sorted(d.token2id.keys()), sorted(f.token2id.keys())
      )
  
imports: from collections.abc import Mapping
  from itertools import chain
  import logging
  import unittest
  import codecs
  import os
  import os.path
  import scipy
  import gensim
  from gensim.corpora import Dictionary
  from gensim.utils import to_utf8
  from gensim.test.utils import get_tmpfile, common_texts
label_desc: Use image node_id 7 for calling the TestDictionary obj's underlying member method code with example usage: obj.test_merge() without return types