如何使用kotlinx序列化来序列化具有open val的kotlin密封类

implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.0")

sealed class MySealedClass {
    abstract val id: Int
}

data class MyClassA(override val id: Int, val name: String) : MySealedClass()
data class MyClassB(override val id: Int, val age: Int) : MySealedClass()

@Serializable
sealed class MySealedClass {
    abstract val id: Int
}

@Serializable
data class MyClassA(override val id: Int, val name: String) : MySealedClass()

@Serializable
data class MyClassB(override val id: Int, val age: Int) : MySealedClass()

import kotlinx.serialization.encodeToString
import kotlinx.serialization.json.Json

val obj: MySealedClass = MyClassA(1, "John")
val jsonString: String = Json.encodeToString(obj)
println(jsonString) // 输出：{"type":"MyClassA","id":1,"name":"John"}

import kotlinx.serialization.decodeFromString
import kotlinx.serialization.json.Json

val jsonString = """{"type":"MyClassA","id":1,"name":"John"}"""
val obj: MySealedClass = Json.decodeFromString(jsonString)
println(obj) // 输出：MyClassA(id=1, name="John")