data class Nullables(val first: String?, val second: Any?) {
    fun nonNull() = NonNull(first!!, second!!)
}
data class NonNull(val first: String, cal second: Any)

fun nonNullOrNull(): NonNull? {
    val fst = first ?: return null
    val snd = second ?: return null
    return NonNull(fst, snd)
}