return false;
        }
        refresh();
        return true;
    }

    public boolean deleteDocumentWords() {
        final SuggestDeleteResponse response = suggester.indexer().deleteDocumentWords();
        if (response.hasError()) {
            logger.warn("Failed to delete document words.", response.getErrors().get(0));
            return false;
        }

        final SuggestDeleteResponse response = deleteByQuery(QueryBuilders.matchAllQuery());
        restoreElevateWord();
        return response;
    }

    public SuggestDeleteResponse deleteDocumentWords() {
        final long start = System.currentTimeMillis();

        final SuggestDeleteResponse deleteResponse =