docs: @Override
      protected NodePropBundle loadBundle(NodeId id) throws ItemStateException {
          try {
              ResultSet rs =
                  conHelper.exec(bundleSelectSQL, getKey(id), false, 0);
              try {
                  if (rs != null && rs.next()) {
                      return readBundle(id, rs, 1);
                  } else {
                      return null;
                  }
              } finally {
              	if (rs != null) {
              		rs.close();
              	}
              }
          } catch (SQLException e) {
          	String msg = "failed to read bundle (stacktrace on DEBUG log level): " + id + ": " + e; 
              log.error(msg);
              log.debug("failed to read bundle: " + id, e);
              throw new ItemStateException(msg, e);
          }
      }