public static function isValidNextStatus($model, $status_id)
	{
		$eventSequence = $model->getEventSequence($status_id);
		foreach ($eventSequence['before'] as $event) {
			if ($model->hasEventHandlers($event->name)) {
				$model->trigger($event->name, $event);
				if ($event->isValid === false) {
					return false;
				}
			}
		}
		return true;
	}