for k, v := range b.cachesRoot {
		tmp := make([]string, len(v))
		copy(tmp, v)
		dst2[k] = tmp
	}

	return dst, dst2
}

// deleteAll will delete all on disk data for ALL caches.
// Deletes are performed concurrently.
func (b *bucketMetacache) deleteAll() {
	ctx := context.Background()

	objAPI := newObjectLayerFn()
	if objAPI == nil {
		return
	}

	ez, ok := objAPI.(deleteAllStorager)

        dataHelper.clearUrlPattern(sessionId);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.service.impl.UrlFilterService#deleteAll()
     */
    @Override
    public void deleteAll() {
        dataHelper.clearUrlPattern();
    }

    /*
     * (non-Javadoc)
     *
     * @see

        dataHelper.removeUrlQueueList(sessionId);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.service.UrlQueueService#deleteAll()
     */
    @Override
    public void deleteAll() {
        dataHelper.clearUrlQueueList();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.service.UrlQueueService#offerAll(java.lang.String,

     *
     * @return HTML response redirecting to the failure URL list page
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse deleteall() {
        verifyToken(this::asListHtml);
        failureUrlService.deleteAll(failureUrlPager);
        failureUrlPager.clear();
        saveInfo(messages -> messages.addSuccessFailureUrlDeleteAll(GLOBAL));
        return redirect(getClass());
    }

 *   <li>{@code add(ElevateWord elevateWord)} - Adds a new elevate word to the settings.</li>
 *   <li>{@code delete(String elevateWord)} - Deletes an elevate word from the settings.</li>
 *   <li>{@code deleteAll()} - Deletes all elevate words from the settings.</li>
 * </ul>
 *
 * <p>Protected Constructor:</p>
 * <ul>

        }
        arraySettings.delete(BAD_WORD_SETTINGD_KEY, badWord);
    }

    /**
     * Delete all bad words.
     */
    public void deleteAll() {
        if (logger.isDebugEnabled()) {
            logger.debug("Add all badword. {}", arraySettings.arraySettingsIndexName);
        }
        arraySettings.delete(BAD_WORD_SETTINGD_KEY);
    }

    /**

        assertEquals(elevateWord3.getElevateWord(), settings.elevateWord().get()[1].getElevateWord());

        settings.elevateWord().deleteAll();
        assertEquals(0, settings.elevateWord().get().length);
    }

        }

        public long getQueryWordsNum() {
            return 30L;
        }
    }

    private static class MockSuggestIndexer {
        public MockSuggestDeleteResponse deleteAll() {
            return new MockSuggestDeleteResponse();
        }

        public MockSuggestDeleteResponse deleteDocumentWords() {
            return new MockSuggestDeleteResponse();
        }

    /**
     * Deletes a URL queue.
     *
     * @param sessionId The session ID.
     */
    void delete(String sessionId);

    /**
     * Deletes all URL queues.
     */
    void deleteAll();

    /**
     * Offers all URL queues.
     *
     * @param sessionId The session ID.
     * @param newUrlQueueList The list of new URL queues.
     */

     *
     * @return true if the operation was successful, false otherwise.
     */
    public boolean deleteAllWords() {
        final SuggestDeleteResponse response = suggester.indexer().deleteAll();
        if (response.hasError()) {
            logger.warn("Failed to delete all words.", response.getErrors().get(0));
            return false;
        }
        refresh();
        return true;
    }