<?php  namespace App\Mail;  use App\Models\Order; use Illuminate\Bus\Queueable; use Illuminate\Mail\Mailable; use Illuminate\Queue\SerializesModels; use Illuminate\Contracts\Queue\ShouldQueue;  class OrderCreatedMail extends Mailable implements ShouldQueue { 	use Queueable, SerializesModels;  	protected Order $order;  	/** 	 * Create a new message instance. 	 */ 	public function __construct(?Order $order = null){}  	public function build(): self{} }