| 
Functions | 
| Real | unsafeSabrVolatility (Rate strike, Rate forward, Time expiryTime, Real alpha, Real beta, Real nu, Real rho) | 
| Real | sabrVolatility (Rate strike, Rate forward, Time expiryTime, Real alpha, Real beta, Real nu, Real rho) | 
| void | validateSabrParameters (Real alpha, Real beta, Real nu, Real rho) |