docs: private void adjustOriginalPositionIndicator(
          CmsSitemapTreeItem draggable,
          I_CmsDropTarget target,
          CmsDNDHandler handler) {
  
          if (!isChangedPosition(draggable, target, true)) {
              draggable.getElement().addClassName(I_CmsSitemapLayoutBundle.INSTANCE.sitemapItemCss().markUnchanged());
              List<Element> itemWidget = CmsDomUtil.getElementsByClass(
                  org.opencms.gwt.client.ui.css.I_CmsLayoutBundle.INSTANCE.listItemWidgetCss().itemContainer(),
                  handler.getPlaceholder());
              if ((itemWidget != null) && (itemWidget.size() > 0)) {
                  CmsDomUtil.addDisablingOverlay(itemWidget.get(0));
              }
          } else {
              draggable.getElement().removeClassName(I_CmsSitemapLayoutBundle.INSTANCE.sitemapItemCss().markUnchanged());
              CmsDomUtil.removeDisablingOverlay(handler.getPlaceholder());
          }
      }