public function toMail(Order $notifiable) 	{ 		return (new MailMessage) 			->subject(__('emails.shipping-info-updated')) 			->line(__('emails.shipping-number-created', ['order_number' => $this->order->id])) 			->line(__('emails.shipping-number', ['shipping_number' => $this->shipment->tracking_number])) 			->action(__('emails.track-order'), URLGenerator::shippingUrl($this->shipment->tracking_number, $this->order->shipping_provider)) 			->line(__('emails.final-words')); 	}