docs: public List<Node<K, V>> stab(K k) {
        Interval<K> i = new Interval<K>(k, true, k, true);
        final List<Node<K, V>> nodes = new ArrayList<Node<K, V>>();
        findOverlap(root.left, i, new NodeCallback<K, V>() {
           @Override
           public void handle(Node<K, V> node) {
              nodes.add(node);
           }
        });
        return nodes;
     }