docs: public void updateContentList(List<CmsTreeItem> treeItemsToShow) {
  
          m_scrollList.clearList();
          if ((treeItemsToShow != null) && !treeItemsToShow.isEmpty()) {
              for (CmsTreeItem dataValue : treeItemsToShow) {
                  dataValue.removeOpener();
                  m_scrollList.add(dataValue);
                  CmsScrollPanel scrollparent = (CmsScrollPanel)m_scrollList.getParent();
                  scrollparent.onResizeDescendant();
              }
          } else {
              showIsEmptyLabel();
          }
          scheduleResize();
      }