[lolinder]

I've done it in Kotlin, and I suspect that modern Java should be quite amenable to it with records.

It was really nice in my Kotlin project because we were dealing with legacy data structures with very confusing names—being able to guarantee that a UserID doesn't accidentally get passed where a UserDataID was expected helped prevent a lot of the bugs that plagued the legacy apps.

[diarrhea]

That's great to hear. We did the same, but in C#, using its records. The codebase didn't exactly suffer from errors from ID misuse (all of which were the same type beforehand), but it's great for future-proofing as well.

Added benefit, as always when leaning into the type system more, is a reduction in the number of unit tests required. The need to test that `update_user(group_id)` fails (because a non-user ID was passed) simply disappears.