class MultipleCurrencyAmount implements ImmutableBean,
    Iterable<CurrencyAmount>, Serializable {

  @Override
  public String toString() {
    return _currencyAmountMap.values().toString();
  }

  private  MultipleCurrencyAmount(ImmutableSortedMap<Currency, CurrencyAmount> currencyAmountMap);
  private  MultipleCurrencyAmount(
      SortedMap<Currency, CurrencyAmount> currencyAmountMap);

}