--- /dev/null
+<?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\Loader\Configurator\Traits;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+trait DecorateTrait
+{
+ /**
+ * Sets the service that this service is decorating.
+ *
+ * @param null|string $id The decorated service id, use null to remove decoration
+ * @param null|string $renamedId The new decorated service id
+ * @param int $priority The priority of decoration
+ *
+ * @return $this
+ *
+ * @throws InvalidArgumentException in case the decorated service id and the new decorated service id are equals
+ */
+ final public function decorate($id, $renamedId = null, $priority = 0)
+ {
+ $this->definition->setDecoratedService($id, $renamedId, $priority);
+
+ return $this;
+ }
+}