code: def test_lang_de(self):
      text = "llllllllllllllllll lllllll"
      aug = nac.KeyboardAug(lang="de")
  
      augmented = False
      # make sure it convert to at least one of the DE char
      for _ in range(10):
          augmented_data = aug.augment(text)
          augmented_text = augmented_data[0]
          if "ö" in augmented_text or "Ö" in augmented_text:
              augmented = True
              self.assertNotEqual(text, augmented_text)
  
      self.assertTrue(augmented)
  
imports: import unittest
  import re
  import json
  import os
  import nlpaug.augmenter.char
label_desc: Use image node_id 4 for calling the TestKeyboard obj's underlying member method code with example usage: obj.test_lang_de() without return types