Edit File: Parameter.php
<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\DependencyInjection; /** * Parameter represents a parameter reference. * * @author Fabien Potencier <fabien@symfony.com> */ class Parameter { private $id; public function __construct(string $id) { $this->id = $id; } /** * @return string The parameter key */ public function __toString() { return $this->id; } }