### Question:
CurrencyParameterSensitivities implements FxConvertible<CurrencyParameterSensitivities>, ImmutableBean, Serializable { public static CurrencyParameterSensitivitiesBuilder builder() { return new CurrencyParameterSensitivitiesBuilder(); } @ImmutableConstructor private  CurrencyParameterSensitivities(List<? extends CurrencyParameterSensitivity> sensitivities); private  CurrencyParameterSensitivities(ImmutableList<CurrencyParameterSensitivity> sensitivities); static CurrencyParameterSensitivities empty(); static CurrencyParameterSensitivitiesBuilder builder(); static CurrencyParameterSensitivities of(CurrencyParameterSensitivity sensitivity); static CurrencyParameterSensitivities of(CurrencyParameterSensitivity... sensitivities); static CurrencyParameterSensitivities of(List<? extends CurrencyParameterSensitivity> sensitivities); int size(); CurrencyParameterSensitivity getSensitivity(MarketDataName<?> name, Currency currency); Optional<CurrencyParameterSensitivity> findSensitivity(MarketDataName<?> name, Currency currency); CurrencyParameterSensitivities combinedWith(CurrencyParameterSensitivity other); CurrencyParameterSensitivities combinedWith(CurrencyParameterSensitivities other); CurrencyParameterSensitivities mergedWith(CurrencyParameterSensitivities other); CurrencyParameterSensitivities withMarketDataNames(Function<MarketDataName<?>, MarketDataName<?>> nameFn); CurrencyParameterSensitivities withParameterMetadatas(UnaryOperator<ParameterMetadata> mdFn); @Override CurrencyParameterSensitivities convertedTo(Currency resultCurrency, FxRateProvider rateProvider); CurrencyParameterSensitivities split(); CurrencyAmount total(Currency resultCurrency, FxRateProvider rateProvider); MultiCurrencyAmount total(); CurrencyParameterSensitivities multipliedBy(double factor); CurrencyParameterSensitivities mapSensitivities(DoubleUnaryOperator operator); boolean equalWithTolerance(CurrencyParameterSensitivities other, double tolerance); CurrencyParameterSensitivitiesBuilder toBuilder(); static CurrencyParameterSensitivities.Meta meta(); @Override CurrencyParameterSensitivities.Meta metaBean(); ImmutableList<CurrencyParameterSensitivity> getSensitivities(); @Override boolean equals(Object obj); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void test_builder_emptyMetadata() { assertThatIllegalArgumentException().isThrownBy(() -> CurrencyParameterSensitivities.builder().add(ENTRY_USD)); }