*
   * <p>Note: if {@code map} is a {@link com.google.common.collect.BiMap BiMap} (or can be one), you
   * can use {@link com.google.common.collect.Maps#asConverter Maps.asConverter} instead to get a
   * function that also supports reverse conversion.
   *
   * <p><b>Java 8+ users:</b> if you are okay with {@code null} being returned for an unrecognized

   *
   * <p>Note: if {@code map} is a {@link com.google.common.collect.BiMap BiMap} (or can be one), you
   * can use {@link com.google.common.collect.Maps#asConverter Maps.asConverter} instead to get a
   * function that also supports reverse conversion.
   *
   * <p><b>Java 8+ users:</b> if you are okay with {@code null} being returned for an unrecognized

    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);

 *       #reverse reverse} views of these.
 *   <li>Convert between specific preset values using {@link
 *       com.google.common.collect.Maps#asConverter Maps.asConverter}. For example, use this to
 *       create a "fake" converter for a unit test. It is unnecessary (and confusing) to <i>mock</i>
 *       the {@code Converter} type using a mocking framework.

 *       #reverse reverse} views of these.
 *   <li>Convert between specific preset values using {@link
 *       com.google.common.collect.Maps#asConverter Maps.asConverter}. For example, use this to
 *       create a "fake" converter for a unit test. It is unnecessary (and confusing) to <i>mock</i>
 *       the {@code Converter} type using a mocking framework.

   * 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;