code: protected boolean checkForAllowChildren(final Instance _instance)
      {
          setExecutionStatus(UIStructurBrowser.ExecutionStatus.ALLOWSCHILDREN);
          try {
              final List<Return> ret = getObject4Event().executeEvents(EventType.UI_TABLE_EVALUATE,
                              ParameterValues.INSTANCE, _instance,
                              ParameterValues.CLASS, this);
              return ret.isEmpty() ? false : ret.get(0).get(ReturnValues.TRUE) != null;
          } catch (final EFapsException e) {
              throw new RestartResponseException(new ErrorPage(e));
          }
      }
docs: This method is used to check if a node has potential children.
  
  @param _instance Instance of a Node to be checked
  @return true if this Node has children, else false