Currency Swap Old
Currency Swap Old is a of with functions , keys and example object that represents a product identical with the with the only exception being that this type here also supports the function
It is retained as legacy for a short time period.
You are advised to switch to using the as soon as possible to avoid a future disruption.
If after the switch you need to calculate the fair spread, you can either use the function together with the key , or apply the function on an existing object that holds the prising result of a Currency Swap Old tradable.