public function col_component($event) {
        // Component.
        $componentname = $event->component;
        if (($event->component === 'core') || ($event->component === 'legacy')) {
            return  get_string('coresystem');
        } else if (get_string_manager()->string_exists('pluginname', $event->component)) {
            return get_string('pluginname', $event->component);
        } else {
            return $componentname;
        }
    }