[Quantlib-users] ql.SwapRateHelper arguments

[Victoria T. <vic...@we...>]

Hello,

I saw we can precise a DiscountingCurve (YieldTermStructureHandle format)
argument in the ql.SwapRateHelper function.
As it is not mandatory (the default value is an empty value), I don't
understand which information does the function take from this argument?
Actually, if I put a yieldTermstructureHandle discounting curve, in what
way the SwapHelper will change?

Thanks in advance for your answer.