/**
* Returns the volatility for given expiry, tenor, strike and forward rate.
*
* @param expiryTime time to expiry
* @param tenor tenor
* @param strike the strike
* @param forward the forward
* @return the volatility
*/
public double getVolatility(double expiryTime, double tenor, double strike, double forward) {
DoublesPair expiryTenor = DoublesPair.of(expiryTime, tenor);
SabrFormulaData data =
SabrFormulaData.of(
getAlpha(expiryTenor), getBeta(expiryTenor), getRho(expiryTenor), getNu(expiryTenor));
double shift = getShift(expiryTenor);
return sabrFunctionProvider.getVolatility(forward + shift, strike + shift, expiryTime, data);
}
