* @return the sortPrefix
     */
    public String getSortPrefix() {
        return sortPrefix;
    }

    /**
     * @param sortPrefix the sortPrefix to set
     */
    public void setSortPrefix(final String sortPrefix) {
        this.sortPrefix = sortPrefix;
    }

    /**
     * @return the additionalQuery
     */
    public String getAdditionalQuery() {
        return additionalQuery;