code: def test_reserved_word(self):
      texts = [
          "Fwd: Mail for solution",
          "Dear NLP, Thanks. Regards. NLPAug",
      ]
  
      reserved_tokens = [["Fwd", "Forward"], ["Regards", "Sincerely"]]
      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)
  
file_path: nlpaug/test/augmenter/word/test_reserved.py
imports: import unittest
  import nlpaug.augmenter.word
label_desc: Use image node_id 1 for calling the TestReserved obj's underlying member method code with example usage: obj.test_reserved_word() without return types