@CanIgnoreReturnValue
  public Directory createDirectory(JimfsPath path, FileAttribute<?>... attrs) throws IOException {
    return (Directory) createFile(path, store.directoryCreator(), true, attrs);
  }
Creates a new directory at the given path. The given attributes will be set on the new file if
possible.
jimfs/src/main/java/com/google/common/jimfs/FileSystemView.java