@ElementTypesAreNonnullByDefault
final class SingletonImmutableSet<E> extends ImmutableSet<E> {
  // We deliberately avoid caching the asList and hashCode here, to ensure that with
  // compressed oops, a SingletonImmutableSet packs all the way down to the optimal 16 bytes.

  final transient E element;

  SingletonImmutableSet(E element) {
    this.element = Preconditions.checkNotNull(element);
  }

   */
  public static final MediaType KML = createConstant(APPLICATION_TYPE, "vnd.google-earth.kml+xml");

  /**
   * <a href="http://www.opengeospatial.org/standards/kml/">OGC KML (Keyhole Markup Language)</a>,
   * compressed using the ZIP format into KMZ archives.
   */
  public static final MediaType KMZ = createConstant(APPLICATION_TYPE, "vnd.google-earth.kmz");

  /**