function getMembersByGroup() { $group = DataObject::get_by_id("Group", $this->urlParams['ID']); if ($group) { $memberList = new MemberList('Users', $group); $memberList->setController($this); return $memberList->renderWith('MemberList'); } else { return user_error("CMSMain::getpagemembers() Cannot find Group #{$group->ID}", E_USER_ERROR); } }