final String key = ComponentUtil.getVirtualHostHelper().getVirtualHostKey();
        if (StringUtil.isNotBlank(key)) {
            tags = ArrayUtils.addAll(tags, key);
        }
        final String[] fields = request.getParameterValues("field");

        final PopularWordHelper popularWordHelper = ComponentUtil.getPopularWordHelper();

        final List<String> defaultGroups = getDefaultGroupList();
        final List<String> defaultRoles = getDefaultRoleList();
        groupList.addAll(defaultGroups);
        roleList.addAll(defaultRoles);

        if (logger.isDebugEnabled()) {
            logger.debug("[updateMemberOf] Default groups: {}, Default roles: {}", defaultGroups, defaultRoles);
        }