Sort objects in Kotlin by dynamically sorted field order

dynamicSorting.kt

data class User(val id: String, val email: String, val title: String)

val sortedById = {u : User -> u.id}
val sortedByEmail = {u : User -> u.email}

val sortOrder = listOf("id", "email")

val transformedSortOrderListToComparable = sortOrder.map {
    when (it) {
        "id" -> sortedById //Can inline
        "email" -> sortedByEmail //Can inline
        else -> throw IllegalArgumentException("Not supported")
    }
}

val userList = listOf(
        User("1","b","a"),
        User("1","a","b")
)

val sorted = userList.sortedWith(compareBy(*transformedSortOrderListToComparable.toTypedArray()))

println(sorted) //title b comes first as expected
//[User(id=1, email=a, title=b), User(id=1, email=b, title=a)]