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- <?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\Messenger\Middleware;
- /**
- * @author Nicolas Grekas <p@tchwork.com>
- *
- * Implementations must be cloneable, and each clone must unstack the stack independently.
- */
- interface StackInterface
- {
- /**
- * Returns the next middleware to process a message.
- */
- public function next(): MiddlewareInterface;
- }
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