code: @Beta
    public static <A, B> Converter<A, B> asConverter(final BiMap<A, B> bimap) {
      return new BiMapConverter<A, B>(bimap);
    }
docs: Returns a {@link Converter} that converts values using {@link BiMap#get bimap.get()},
  and whose inverse view converts values using
  {@link BiMap#inverse bimap.inverse()}{@code .get()}.
  
  <p>To use a plain {@link Map} as a {@link Function}, see
  {@link com.google_voltpatches.common.base.Functions#forMap(Map)} or
  {@link com.google_voltpatches.common.base.Functions#forMap(Map, Object)}.
  
  @since 16.0