code: private void restoreData() {
  		Map<String, ?> map = preferenceUtils.getAll();
  		Set<String> strings = map.keySet();
  
  		for (String string : strings) {
  			if (string.startsWith(SharedPreferenceUtils.keyTestMode)) {
  				preferenceUtils.restoreKey(string);
  			}
  		}
  
  		refreshKeyValues();
  
  	}
docs: Restore values of original keys stored.