code: private Object _readJson(String path) throws ZooKeeperException {
          String jsonString = getData(path);
          try {
              return jsonString != null ? SerializationUtils.fromJsonString(jsonString) : null;
          } catch (Exception e) {
              if (e instanceof ZooKeeperException) {
                  throw (ZooKeeperException) e;
              } else {
                  throw new ZooKeeperException(e);
              }
          }
      }
docs: Reads Json data from a node.
  
  @param path
  @return
  @throws ZooKeeperException