public static int SumListsForwardOrder(LinkedListImplementation linkedListImplementation1,
                                        LinkedListImplementation linkedListImplementation2)
 {
     return(Node.SumNodesForwardOrder(linkedListImplementation1._node, linkedListImplementation2._node));
 }
 public LinkedListImplementation(LinkedListImplementation linkedList)
 {
     _node = linkedList._node;
 }