code: public void restoreKey(String key) {
  		if (!key.equalsIgnoreCase("test_mode_opened")) {
  			String originalKey = key.substring(keyTestMode.length());
  			Object value = get(key);
  			put(originalKey, value);
  			clear(key);
  		}
  	}
docs: Restore the original value for the key after it has been changed in test mode.
  
  @param key
  : Key whose value is to be restored