SearchResponse response = option.apply(client.prepareSearch(index).setScroll(scrollForUpdate).setSize(sizeForUpdate)
                .setPreference(Constants.SEARCH_PREFERENCE_LOCAL)).execute().actionGet(fessConfig.getIndexScrollSearchTimeout());

        int count = 0;
        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = response.getHits();

     * The value is, e.g. 3m <br>
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexScrollSearchTimeout();

    /**
     * Get the value for the key 'index.index.timeout'. <br>
     * The value is, e.g. 3m <br>