* @param userBean the optional user bean for access control and personalization
     * @return the search result containing matched documents and metadata
     */
    protected abstract SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean);

     * @param condition    the search condition
     * @param searchResult the result processor
     * @return the processed result
     */
    protected <T> T get(final String index, final String id, final SearchCondition<GetRequestBuilder> condition,
            final SearchResult<T, GetRequestBuilder, GetResponse> searchResult) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();