public function get_defaultsetting() {
        global $CFG;

        if (during_initial_install()) {
            return null;
        }
        $result = array();
        foreach($this->types as $archetype) {
            if ($caproles = get_archetype_roles($archetype)) {
                foreach ($caproles as $caprole) {
                    $result[$caprole->id] = 1;
                }
            }
        }
        return $result;
    }