MemoryBackendFactory.php

<?php

namespace Drupal\Core\Cache;

use Drupal\Component\Datetime\TimeInterface;
class MemoryBackendFactory implements CacheFactoryInterface {
    
    /**
     * Instantiated memory cache bins.
     *
     * @var \Drupal\Core\Cache\MemoryBackend[]
     */
    protected $bins = [];
    
    /**
     * Constructs a MemoryBackendFactory object.
     *
     * @param \Drupal\Component\Datetime\TimeInterface|null $time
     *   The time service.
     */
    public function __construct(?TimeInterface $time = NULL) {
        if (!$time) {
            @trigger_error('Calling ' . __METHOD__ . '() without the $time argument is deprecated in drupal:10.3.0 and it will be required in drupal:11.0.0. See https://www.drupal.org/node/3387233', E_USER_DEPRECATED);
            $this->time = \Drupal::service(TimeInterface::class);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function get($bin) {
        if (!isset($this->bins[$bin])) {
            $this->bins[$bin] = new MemoryBackend($this->time);
        }
        return $this->bins[$bin];
    }

}