the case is - that copy is very good for mutation and i want to make some kind of aspect for my pojos with interface so

interface Archievable {
    val status: ArchievedStatus
}
enum class ArchievedStatus { NEW, READY,ARCHIVED}
 ///and then
data calss User(val blabla, override val status: ArchievedStatus): Archievable 
data calss Company(val blabla, override val status: ArchievedStatus): Archievable 
///with definition of archiving i wan't to create single method that use copy method and work with 2 pojos

and don't want lose

copy

form data class but use it to update entities

I'm afraid that's not possible, you can work around it by having another function

readCopy()

in the interface and implement that in every data class by just calling the generated

copy()

one.

override fun archiving(): PojoA = this.copy(status = ArchievedStatus.ARCHIVED)

just make this function as implementation of

fun archiving(): Archievable

It quite awkward really, having autogenerated functions implement interfaces.