driver-core/src/main/com/mongodb/internal/connection/ConcurrentLinkedDeque.java
private Node<E> findPredecessorOf(Node<E> target) {
            Node<E> n = this;
            for (;;) {
                Node<E> f = n.successor();
                if (f == target)
                    return n;
                if (f == null)
                    return null;
                n = f;
            }
        }
private Node<E> findPredecessorOf(Node<E> target) {
            Node<E> n = this;
            for (;;) {
                Node<E> f = n.successor();
                if (f == target)
                    return n;
                if (f == null)
                    return null;
                n = f;
            }
        }
Returns the apparent predecessor of target by searching
forward for it, starting at this node, patching up pointers
while traversing. Used by predecessor().

@return target's predecessor, or null if not found