Generate Java-Style Builders for Interop

Language Design
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Thanks :slight_smile: Nice idea. I hadn’t considered extension functions for companion objects! I’ll have a look when I get the chance (which may not be that soon).

Edit: Sadly it doesn’t seem possible to annotate extension functions with @JvmStatic, so Java classes wouldn’t see any such MyDataClass.builder() method. It would be visible in Kotlin, but you don’t really need it in Kotlin.