Webiny\Component\Storage\Storage::supportsDirectories PHP Method

    public function supportsDirectories()
    {
        return $this->driver instanceof DirectoryAwareInterface;
    }

 /**
  * Constructor
  *
  * @param string      $key               File key
  * @param Storage     $storage           Storage to use
  * @param bool        $recursive         (Optional) By default, Directory will only read the first level if items.
  *                                       If set to true, Directory will read all children items and list them as one-dimensional array.
  * @param null|string $filter            (Optional) Filter to use when reading directory items
  *
  * @throws \Webiny\Component\Storage\StorageException
  */
 public function __construct($key, Storage $storage, $recursive = false, $filter = null)
 {
     if (!$storage->supportsDirectories()) {
         $driver = get_class($storage->getDriver());
         throw new StorageException(StorageException::DRIVER_CAN_NOT_WORK_WITH_DIRECTORIES, [$driver]);
     }
     $this->key = $key;
     $this->recursive = $recursive;
     $this->storage = $storage;
     if ($this->storage->keyExists($key) && !$this->storage->isDirectory($key)) {
         throw new StorageException(StorageException::DIRECTORY_OBJECT_CAN_NOT_READ_FILE_PATHS, [$key]);
     }
     $this->parseFilter($filter);
 }