Yeah, this type of check is nice if you intend to implement an interface, but don't actually use the type as that interface in your package. This will give a co

Yeah, this type of check is nice if you intend to implement an interface, but don't actually use the type as that interface in your package. This will give a compile time error if your type doesn't satisfy the interface. You could write a test for it too, but this is a little simpler and harder to miss.