关于 OrderPaid 中的这段代码，求解其中有什么不同之处呢？

class OrderPaid
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    protected $order;

    public function __construct(Order $order)
    {
        $this->order = $order;
    }

    public function getOrder()
    {
        return $this->order;
    }
}Copy

class OrderPaid
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    public $order;  // protected 改成  public

    public function __construct(Order $order)
    {
        $this->order = $order;
    }
    // getOrder() 这个方法不要了
}Copy