ref

fun ref(value: Boolean): BooleanRef
fun ref(value: Byte): ByteRef
fun ref(value: Short): ShortRef
fun ref(value: Int): IntRef
fun ref(value: Long): LongRef
fun ref(value: Float): FloatRef
fun ref(value: Double): DoubleRef
fun ref(value: Char): CharRef
fun <T> ref(value: T): Ref<T>