* Limited by the configured maximum fetch size for groups.
     *
     * @return a list of all available groups
     */
    public List<Group> getAvailableGroupList() {
        return groupBhv.selectList(cb -> {
            cb.query().matchAll();
            cb.query().addOrderBy_Name_Asc();
            cb.paging(fessConfig.getPageGroupMaxFetchSizeAsInteger(), 1);
        });