Converter<String, Integer> converter = Maps.asConverter(biMap);
    assertEquals("Maps.asConverter({one=1, two=2})", converter.toString());
  }

  public void testAsConverter_serialization() {
    ImmutableBiMap<String, Integer> biMap =
        ImmutableBiMap.of(
            "one", 1,
            "two", 2);
    Converter<String, Integer> converter = Maps.asConverter(biMap);

    Converter<String, Integer> converter = Maps.asConverter(biMap);
    assertEquals("Maps.asConverter({one=1, two=2})", converter.toString());
  }

  public void testAsConverter_serialization() {
    ImmutableBiMap<String, Integer> biMap =
        ImmutableBiMap.of(
            "one", 1,
            "two", 2);
    Converter<String, Integer> converter = Maps.asConverter(biMap);

   * com.google.common.base.Functions#forMap(Map)} or {@link
   * com.google.common.base.Functions#forMap(Map, Object)}.
   *
   * @since 16.0
   */
  public static <A, B> Converter<A, B> asConverter(final BiMap<A, B> bimap) {
    return new BiMapConverter<>(bimap);
  }

  private static final class BiMapConverter<A, B> extends Converter<A, B> implements Serializable {
    private final BiMap<A, B> bimap;