docs: public Node findById(Long nodeId) {
          Assert.assertNotNull(nodeId);
          List<Node> nodes = listByIds(nodeId);
          if (nodes.size() != 1) {
              String exceptionCause = "query nodeId:" + nodeId + " return null.";
              logger.error("ERROR ## " + exceptionCause);
              throw new ManagerException(exceptionCause);
          }
  
          return nodes.get(0);
  
      }