For runtime polymorphism you'd have to define a wrapper of some sort, which in this specific case would be completely trivial since it's only one method. In mor

For runtime polymorphism you'd have to define a wrapper of some sort, which in this specific case would be completely trivial since it's only one method. In more complex cases it gets pretty awful compared to the Go version, but it's not impossible (although AFAIK if the methods you care about have different names in the different implementations you'll need a wrapper even in Go).