@Override
        public String[] getSearchDefaultPermissionsAsArray() {
            return new String[] { "guest", "default" };
        }

        @Override
        public List<String> getSearchGuestRoleList() {
            List<String> roles = new ArrayList<>();
            roles.add("guest_role1");
            roles.add("guest_role2");
            return roles;
        }

        @Override

        final String indexFieldTimestamp = fessConfig.getIndexFieldTimestamp();
        final String indexFieldLang = fessConfig.getIndexFieldLang();
        final List<String> guestRoleList = fessConfig.getSearchGuestRoleList();
        final Date now = systemHelper.getCurrentTime();
        final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();

    }

    String getRoleSearchUserPrefix();

    String getRoleSearchGuestPermissions();

    default List<String> getSearchGuestRoleList() {
        @SuppressWarnings("unchecked")
        List<String> list = (List<String>) propMap.get(SEARCH_GUEST_ROLE_LIST);
        if (list == null) {