@Override
protected Set<ComputedValue> getResult(final InstrumentDerivative fxDigital, final ForexOptionDataBundle<?> data, final ComputationTarget target,
final Set<ValueRequirement> desiredValues, final FunctionInputs inputs, final ValueSpecification spec, final FunctionExecutionContext executionContext) {
final String spreadName = Iterables.getOnlyElement(desiredValues).getConstraint(CalculationPropertyNamesAndValues.PROPERTY_CALL_SPREAD_VALUE);
final double spread = Double.parseDouble(spreadName);
final GammaValueCallSpreadBlackForexCalculator calculator = new GammaValueCallSpreadBlackForexCalculator(spread);
final CurrencyAmount result = fxDigital.accept(calculator, data);
final double amount = result.getAmount();
return Collections.singleton(new ComputedValue(spec, amount));
}