code: public boolean setData(String path, byte[] value, boolean createNodes)
              throws ZooKeeperException {
          return _write(path, value, createNodes);
      }
docs: Writes raw data to a node.
  
  @param path
  @param value
  @param createNodes
  {@code true} to have nodes to be created if not exist
  @return {@code true} if write successfully, {@code false} otherwise (note
  does not exist, for example)
  @throws ZooKeeperException