class NullFileCache

class NullFileCache implements FileCacheInterface {
    
    /**
     * Constructs a FileCache object.
     *
     * @param string $prefix
     *   A prefix that is used as a prefix, should be set to a secure, unique key
     *   to prevent cache pollution by a third party.
     * @param string $collection
     *   A collection identifier to ensure that the same files could be cached for
     *   different purposes without clashing.
     * @param string|null $cache_backend_class
     *   (optional) The class that should be used as cache backend.
     * @param array $cache_backend_configuration
     *   (optional) The configuration for the backend class.
     */
    public function __construct($prefix, $collection, $cache_backend_class = NULL, array $cache_backend_configuration = []) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function get($filepath) {
        return NULL;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getMultiple(array $filepaths) {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function set($filepath, $data) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function delete($filepath) {
    }

}