hiqdev / php-billing

src/charge/modifiers/addons/WithSince.php

<?php
/**
 * PHP Billing Library
 *
 * @link      https://github.com/hiqdev/php-billing
 * @package   php-billing
 * @license   BSD-3-Clause
 * @copyright Copyright (c) 2017-2020, HiQDev (http://hiqdev.com/)
 */

namespace hiqdev\php\billing\charge\modifiers\addons;

/**
 * With Since trait.
 *
 * @author Andrii Vasyliev <sol@hiqdev.com>
 */
trait WithSince
{
    public function since($time)
    {
        return $this->addAddon('since', new Since($time));

It seems like addAddon() must be provided by classes using this trait. How about adding it as abstract method to this trait?

    }

    public function getSince(): ?Since
    {
        return $this->getAddon('since');

It seems like getAddon() must be provided by classes using this trait. How about adding it as abstract method to this trait?

    }
}