removeLastOrNull
@ExperimentalStdlibApi fun <T> MutableList<T>.removeLastOrNull(): T?Removes the last element from this mutable list and returns that removed element, or returns null if this list is empty.
@ExperimentalStdlibApi fun <T> MutableList<T>.removeLastOrNull(): T?Removes the last element from this mutable list and returns that removed element, or returns null if this list is empty.