kotlinx serialization polimorfizm

@Serializable
@Polymorphic
abstract class A 

@Serializable
data class B(val number: Int): A

@Serializable
data class C(val text: String): A

    val json = Json(JsonConfiguration.Stable, context = SerializersModule {
        polymorphic(A::class) {
            B::class with B.serializer()
            C:class with C.serializer()
        }
    })