invoiceninja/app/Models/Subscription.php

<?php

namespace App\Models;

use Eloquent;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * Class Subscription.
 */
class Subscription extends EntityModel
{
    /**
     * @var bool
     */
    public $timestamps = true;
    use SoftDeletes;

    /**
     * @var array
     */
    protected $dates = ['deleted_at'];

    /**
     * @var array
     */
    protected $fillable = [
        'event_id',
        'target_url',
    ];
}