Best practice for some/any overloads: copy-paste the bodies?

The second overload here is obsolete.

protocol P { }

func ƒ(_: some P) { }
func ƒ(_: any P) { } 

But this second one is not. We can nearly write the same code for overloads that different only by any and some. What should we be doing? Code generation?

func ƒ(_ parameter: some Sequence<some P>) {

func ƒ(_ parameter: some Sequence<any P>) {
  parameter.forEach { ƒ($0) }