code: def test_multi_words(self):
      texts = ["Dear NLP, Thanks. Best Regards Augmenter"]
  
      reserved_tokens = [
          ["Best Regards", "Sincerely", "Regard"],
          ["NLP", "Natural Langauge Processing", "Text"],
      ]
      aug = naw.ReservedAug(reserved_tokens=reserved_tokens)
  
      for text in texts:
          augmented_data = aug.augment(text)
          augmented_text = augmented_data[0]
  
          self.assertNotEqual(augmented_text, text)
          for t in ["NLP", "Best Regards"]:
              self.assertTrue(t not in augmented_text)
  
file_path: nlpaug/test/augmenter/word/test_reserved.py
imports: import unittest
  import nlpaug.augmenter.word
label_desc: Use image node_id 3 for calling the TestReserved obj's underlying member method code with example usage: obj.test_multi_words() without return types