IFolder subRoot3Folder1 = new Folder(null, subRootFolder3, "SubRoot3Folder1");
subRootFolder3.addFolder(subRoot3Folder1, null, false);
subRoot3Folder1.addMark(new BookMark(null, subRoot3Folder1, feed, "SubRoot31Mark1"), null, false);
return beginFromRoot ? new ModelTreeNode(root) : new ModelTreeNode(subRoot211Mark1);
}