driver-core/src/main/com/mongodb/internal/connection/ConcurrentLinkedDeque.java
private boolean casNext(Node<E> cmp, Node<E> val) {
            return compareAndSet(cmp, val);
        }
private boolean casNext(Node<E> cmp, Node<E> val) {
            return compareAndSet(cmp, val);
        }
compareAndSet next link