code: public static CmsModelPageTreeItem createRootItem(boolean isModelGroup, String title, String subTitle) {
  
          return new CmsModelPageTreeItem(isModelGroup, title, subTitle);
      }
docs: Creates the fake model page tree item used as a root for the tree view.<p>
  
  @param isModelGroup in case of a model group page
  @param title the title
  @param subTitle the sub title
  
  @return the root tree item