code: public Stat statNode(String path, ServerCnxn serverCnxn) throws KeeperException.NoNodeException {
          return dataTree.statNode(path, serverCnxn);
      }
docs: stat the path
  @param path the path for which stat is to be done
  @param serverCnxn the servercnxn attached to this request
  @return the stat of this node
  @throws KeeperException.NoNodeException