public static function available_evaluators_list() {
        $evals = array();
        foreach (core_component::get_plugin_list_with_file('workshopeval', 'lib.php', false) as $eval => $evalpath) {
            $evals[$eval] = get_string('pluginname', 'workshopeval_' . $eval);
        }
        return $evals;
    }