Maybe they mean data class inheritance, instead of subclassing? That's the only thing I know of that is planned for Kotlin 1.1 [1], and it's primarily useful fo

Maybe they mean data class inheritance, instead of subclassing? That's the only thing I know of that is planned for Kotlin 1.1 [1], and it's primarily useful for sealed classes (I've wanted this). [1] https://github.com/Kotlin/KEEP/blob/master/proposals/data-class-inheritance.md https://github.com/Kotlin/KEEP/blob/master/proposals/data-cl...