Appends a node to the end of this doubly linked list
Note: node.next will be unlinked from node
Note: if node is part of another linked list call addAll instead
Removes a chain of nodes whose head is a and whose tail is b,
it's assumed that a and b belong to this list and also that a
comes before b in the linked list
Appends a
node
to the end of this doubly linked list Note:node.next
will be unlinked fromnode
Note: ifnode
is part of another linked list calladdAll
instead