removeFirst
@ExperimentalStdlibApi fun <T> MutableList<T>.removeFirst(): TRemoves the first element from this mutable list and returns that removed element, or throws NoSuchElementException if this list is empty.
@ExperimentalStdlibApi fun <T> MutableList<T>.removeFirst(): TRemoves the first element from this mutable list and returns that removed element, or throws NoSuchElementException if this list is empty.