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kotlinlang

I want to compute key/value based on existing properties and that it should appear in the json produced, but it doesn't seem to work...
```@Serializable data class Foo(val id: Int, val name: String) { val computed: String? = "$id --- $name" } // computed doesn't appear in the resulting json...```
how can I get this to work?

Annotate the property with `@EncodeDefault`

<https://kotlinlang.org/api/kotlinx.serialization/kotlinx-serialization-core/kotlinx.serialization/-encode-default/>