code: def test_sequences(self):
      (a, b, c, d, e, f) = self.token_ids
  
      self.assertListEqual(
          self.modality.sequences,
          [[a, b, c], [b, c, d, d], [c, b, e, c, f]],
      )
  
imports: import unittest
  from collections import defaultdict
  import numpy
  import numpy.testing
  from cornac.data import TextModality, ReviewModality
  from cornac.data.text import SPECIAL_TOKENS, DEFAULT_PRE_RULES, BaseTokenizer, Vocabulary, CountVectorizer, TfidfVectorizer
label_desc: Use image node_id 4 for calling the TestTextModality obj's underlying member method code with example usage: obj.test_sequences() without return types