portal/app/Classes/ValueObjects/Constants/Notifications.php

<?php

namespace App\Classes\ValueObjects\Constants;

class Notifications
{
    public const NEW_ARRIVED_PARCEL = [
        'title' => 'New Arrived Parcel',
        'message' => 'you have received new parcel for your order #-'
    ];

    public const UNDEFINED = [
        'title' => 'UNDEFINED TITLE',
        'message' => 'undefined message'
    ];
}