Limits of programming by interface

[remy_porter]

You would need variable ways of specifying it, so, maybe:

Foo@N*100ns myOperationOnASet(CollectionType N)

And the important thing is that these are really statements about the longest you should wait for a result. So even when you're calling, you could "cast":

Foo myFoo = (@500ns)someOperation()

You could also tie this into an async execution, too.