code: @Override
      public Iterator<? extends UIStructurBrowser> getChildren(final UIStructurBrowser _node)
      {
          if (_node.isParent() && !_node.hasChildren()) {
              _node.addChildren();
          }
          return _node.getChildren().iterator();
      }
docs: Get the children of the given node.
  
  @param _node node to get children for
  @return children of node