*     mappings
   */
  public static <K extends Enum<K>, V extends Enum<V>> EnumBiMap<K, V> create(Map<K, V> map) {
    EnumBiMap<K, V> bimap =
        create(inferKeyTypeOrObjectUnderJ2cl(map), inferValueTypeOrObjectUnderJ2cl(map));
    bimap.putAll(map);
    return bimap;
  }

  private EnumBiMap(Class<K> keyTypeOrObjectUnderJ2cl, Class<V> valueTypeOrObjectUnderJ2cl) {
    super(