Linked List API of Ballerina

linked-list-api.bal

public type Node record {|
    any value;
    Node? prev = ();
    Node? next = ();
|};

public type LinkedList record {
    Node? head;
    Node? tail;
};

public function addLast(LinkedList list, Node node);
public function addFirst(LinkedList list, Node node);
public function remove(LinkedList list, Node node);
public function removeLast(LinkedList list) returns Node?;
public function clear(LinkedList list);