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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\HttpKernel\CacheWarmer;
/**
* Interface for classes able to warm up the cache.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
interface CacheWarmerInterface extends WarmableInterface
{
/**
* Checks whether this warmer is optional or not.
*
* Optional warmers can be ignored on certain conditions.
*
* A warmer should return true if the cache can be
* generated incrementally and on-demand.
*
* @return bool
*/
public function isOptional();
}
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