The item must not be a null pointer. Please note that inSort is slow. Inserts the item at the position index in the list. The inserted item becomes the current list item. The item must not be a null pointer.
Returns null if the current item is null or equal to the last item.
Makes the succeeding item current. If the current item before this function call was the last item, the current item will be set to null. If the current item was null, this function does nothing. Assigns list to this list and returns a reference to this list. This list is first cleared, then each item in list is appended to this list.