<?php  namespace App\Models;  use App\Enums\SmsProvider; use App\Observers\IncomingSmsMessageObserver;  class IncomingSmsMessage extends Model { 	protected $casts = [ 		'provider' => SmsProvider::class, 	];  	protected static function initObservers(): string 	{ 		return IncomingSmsMessageObserver::class; 	}  	public function handleDefaultReply(): ?SmsMessage{}  	public function setFromAttribute(string $value): void{}  	public function setToAttribute(string $value): void{} }