/*@Real*/
public static /*@Real*/ double blackFormulaImpliedStdDevApproximation(
            final PlainVanillaPayoff payoff,
            @Real final double strike,
            @Real final double forward,
            @Real final double blackPrice,
            @DiscountFactor final double discount) {
        // TODO : complete
        return blackFormulaImpliedStdDevApproximation(payoff, strike, forward, blackPrice, discount, 0.0);
    }
public static /*@Real*/ double blackFormulaImpliedStdDevApproximation(
final PlainVanillaPayoff payoff,
@Real final double strike,
public static /*@Real*/ double blackFormulaImpliedStdDevApproximation(
final PlainVanillaPayoff payoff,
@Real final double strike,
@Real final double forward,
@Real final double blackPrice,
@DiscountFactor final double discount) {
// TODO : complete
return blackFormulaImpliedStdDevApproximation(payoff, strike, forward, blackPrice, discount, 0.0);
}
public static /*@Real*/ double blackFormulaImpliedStdDevApproximation(
final PlainVanillaPayoff payoff,
@Real final double strike,
@Real final double forward,
@Real final double blackPrice,
@DiscountFactor final double discount) {
// TODO : complete
return blackFormulaImpliedStdDevApproximation(payoff, strike, forward, blackPrice, discount, 0.0);
}