code: public List<String> getChildren(String path, Stat stat, Watcher watcher)
      throws KeeperException.NoNodeException {
          return dataTree.getChildren(path, stat, watcher);
      }
docs: get children list for this path
  @param path the path of the node
  @param stat the stat of the node
  @param watcher the watcher function for this path
  @return the list of children for this path
  @throws KeeperException.NoNodeException