code: @SuppressWarnings("unchecked")
      public void addChildren()
      {
          setExecutionStatus(UIStructurBrowser.ExecutionStatus.ADDCHILDREN);
          final List<Return> ret;
          try {
              ret = getObject4Event().executeEvents(EventType.UI_TABLE_EVALUATE, ParameterValues.INSTANCE, getInstance(),
                              ParameterValues.CLASS, this);
              final Map<Instance, Boolean> map = (Map<Instance, Boolean>) ret.get(0).get(ReturnValues.VALUES);
  
              if (getTableUUID() == null) {
                  executeTree(map, false);
              } else {
                  executeTreeTable(map, false);
              }
          } catch (final EFapsException e) {
              throw new RestartResponseException(new ErrorPage(e));
          }
      }
docs: This method should be called to add children to a Node in the Tree.<br>
  e.g. in a standard implementation the children would be added to the Tree
  on the expand-Event of the tree. The children a retrieved from an esjp
  with the EventType UI_TABLE_EVALUATE.