PersistTheList3.kt

fun main(args: Array<String>) {
    val mutableList: MutableList<Int> = mutableListOf(4, 5, 6)
    val listNotToBeAmended: List<Int> = mutableList
    println("listNotToBeAmended before add: $listNotToBeAmended")
    mutableList.add(3)
    println("listNotToBeAmended after add to underlying list: $listNotToBeAmended")
}