public Map<String, Object> readAttributes(Path path, String attributes, LinkOption... options) {
    // Java 7 NIO defines at least eleven string attributes we'd want to support
    // (eg. BasicFileAttributeView and PosixFileAttributeView), so rather than a partial
    // implementation we rely on the other overload for now.
    throw new UnsupportedOperationException();
  }

  /**
   * Throws {@link UnsupportedOperationException} because Cloud Storage objects are immutable.
   */
  @Override
  public void setAttribute(Path path, String attribute, Object value, LinkOption... options) {
    throw new CloudStorageObjectImmutableException();
  }