CleanCache.php

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<?php
namespace Magento\Backend\Cron;

class CleanCache
{
    private $cacheFrontendPool;

    public function __construct(
        \Magento\Framework\App\Cache\Frontend\Pool $cacheFrontendPool
    ) {
        $this->cacheFrontendPool = $cacheFrontendPool;
    }

    public function execute()
    {
        foreach ($this->cacheFrontendPool as $cacheFrontend) {
            // Magento cache frontend does not support the 'old' cleaning mode, that's why backend is used directly
            $cacheFrontend->getBackend()->clean(\Zend_Cache::CLEANING_MODE_OLD);
        }
    }
}