It seems the play then is to manually implement init(decoder:)

But then when initing the values, do I want to set the "secret" self._favIceCreams that the macro defined? Or the "regular" self.favIceCreams? Swift autocompletes the former but the latter feels more correct? 

 This feels like I'm a criminal somehow even though it's what it suggests

https://files.mastodon.social/media_attachments/files/111/127/624/129/840/340/original/12ca147f64d64f42.png