/** {@inheritDoc} */
 @Override
 public void removeBackup(BackupDirectory backupDirectory, String backupID)
     throws DirectoryException {
   throw new DirectoryException(
       ResultCode.UNWILLING_TO_PERFORM,
       ERR_BACKEND_BACKUP_AND_RESTORE_NOT_SUPPORTED.get(getBackendID()));
 }
 /** {@inheritDoc} */
 @Override
 public void restoreBackup(RestoreConfig restoreConfig) throws DirectoryException {
   throw new DirectoryException(
       ResultCode.UNWILLING_TO_PERFORM,
       ERR_BACKEND_BACKUP_AND_RESTORE_NOT_SUPPORTED.get(getBackendID()));
 }