### Question:
RopeUtils { public static <T extends StreamElement> Node<T> findSearchNode(Node<T> x, long weight, Node<T> root) { if (root == null) { throw new IllegalArgumentException("root is null"); } if (x == null) { return root; } if (x.weight > weight) { return x; } return findSearchNode(x.parent, weight, root); }  static long addWeightsOfRightLeaningChildNodes(Node<T> x); static long addWeightsOfRightLeaningParentNodes(Node<T> child); static void adjustWeightOfLeftLeaningParents(Node<T> startNode, long weight); static long characterCount(Node<T> x); static void collectLeafNodes(Node<T> x, Queue<Node<T>> queue); static Node<T> concat(List<Node<T>> orphans); static Node<T> concat(Node<T> left, Node<T> right); static void cutLeftNode(Node<T> x, List<Node<T>> orphans); static void cutRightNode(Node<T> x, List<Node<T>> orphans); static Node<T> findRoot(Node<T> child); static Node<T> findSearchNode(Node<T> x, long weight, Node<T> root); static NodeIndex<T> index(long characterPosition, Node<T> x, long disp); static boolean intersects(long start, long end, long start2, long end2); static Node<T> rebalance(Node<T> x);  }### Answer:
@Test public void findSearchNode() throws Exception { }