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  1. <?php
  2. /*
  3. * This file is part of the Symfony package.
  4. *
  5. * (c) Fabien Potencier <fabien@symfony.com>
  6. *
  7. * For the full copyright and license information, please view the LICENSE
  8. * file that was distributed with this source code.
  9. */
  10. namespace Symfony\Component\HttpKernel\CacheWarmer;
  11. /**
  12. * Interface for classes that support warming their cache.
  13. *
  14. * @author Fabien Potencier <fabien@symfony.com>
  15. */
  16. interface WarmableInterface
  17. {
  18. /**
  19. * Warms up the cache.
  20. *
  21. * @return string[] A list of classes or files to preload on PHP 7.4+
  22. */
  23. public function warmUp(string $cacheDir);
  24. }