return errors.New("deleting all buckets not allowed")
		}

		cctx, cancel := context.WithCancel(context.Background())
		defer cancel()

		if prefix == "" {
			// if all objects are not deleted yet this call may fail.
			return clnt.RemoveBucket(cctx, bucket)
		}

		objectsCh := make(chan minio.ObjectInfo)

		// Send object names that are needed to be removed to objectsCh
		go func() {

                final long numOfDeleted = searchEngineClient.deleteByQuery(index, queryBuilder);
                logger.info("Deleted {} old docs.", numOfDeleted);
            } catch (final Exception e) {
                logger.error("Could not delete old docs at {}", dataConfig, e);
            }
        }

        /**
         * Checks if the crawling thread has finished execution.
         *

	}
	set := s.getHashedSet(object)
	return set.DeleteObject(ctx, bucket, object, opts)
}

// DeleteObjects - bulk delete of objects
// Bulk delete is only possible within one set. For that purpose
// objects are group by set first, and then bulk delete is invoked
// for each set, the error response of each delete will be returned

# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = Accesso fallito.
errors.app.illegal.transition = Transizione illegale. Riprova.
errors.app.db.already.deleted = Potrebbe essere stato eliminato da un altro processo. Riprova l'operazione.
errors.app.db.already.updated = Potrebbe essere stato aggiornato da un altro processo. Riprova l'operazione.

    /** The specified domain does not exist */
    int NT_STATUS_NO_SUCH_DOMAIN = 0xC00000df;
    /** The directory name is invalid */
    int NT_STATUS_NOT_A_DIRECTORY = 0xC0000103;
    /** The file cannot be deleted */
    int NT_STATUS_CANNOT_DELETE = 0xC0000121;
    /** The format of the specified computer name is invalid */
    int NT_STATUS_INVALID_COMPUTER_NAME = 0xC0000122;

     * when hasNext() was called.
     */
    private @Nullable E nextItem;

    /**
     * Index of element returned by most recent call to next. Reset to -1 if this element is deleted
     * by a call to remove.
     */
    private int lastRet;

    Itr() {
      lastRet = -1;
      if (count == 0) nextIndex = -1;
      else {
        nextIndex = takeIndex;

            if (isCommit) {
                try {
                    dictionaryManager.store(SynonymFile.this, newFile);
                } finally {
                    newFile.delete();
                }
            } else {
                newFile.delete();
            }
        }
    }

# - - - - - - - - - -/
errors.login.failure = Anmeldung fehlgeschlagen.
errors.app.illegal.transition = Ungültiger Übergang. Bitte versuchen Sie es erneut.
errors.app.db.already.deleted = Es wurde möglicherweise von einem anderen Prozess gelöscht. Bitte versuchen Sie den Vorgang erneut.
errors.app.db.already.updated = Es wurde möglicherweise von einem anderen Prozess aktualisiert. Bitte versuchen Sie den Vorgang erneut.

### Garbage Collector

			}
		case "Created":
			z.Created, bts, err = msgp.ReadTimeBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "Created")
				return
			}
		case "Deleted":
			z.Deleted, bts, err = msgp.ReadTimeBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "Deleted")
				return
			}
		case "Versioning":
			z.Versioning, bts, err = msgp.ReadBoolBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "Versioning")