code: @Override
  	public void doTag() throws JspTagException, IOException {
  		try {
  			final PageContext pageContext = (PageContext)getJspContext();
  			NavigationTreeRenderer.writeNavigationTree(
  				pageContext.getServletContext(),
  				pageContext.getELContext(),
  				(HttpServletRequest)pageContext.getRequest(),
  				(HttpServletResponse)pageContext.getResponse(),
  				pageContext.getOut(),
  				root,
  				skipRoot,
  				yuiConfig,
  				includeElements,
  				target,
  				thisDomain,
  				thisBook,
  				thisPage,
  				linksToDomain,
  				linksToBook,
  				linksToPage,
  				maxDepth
  			);
  		} catch(ServletException e) {
  			throw new JspTagException(e);
  		}
  	}
docs: Creates the nested &lt;ul&gt; and &lt;li&gt; tags used by TreeView.
  The first level is expanded.
  
  <a href="http://developer.yahoo.com/yui/treeview/#start">http://developer.yahoo.com/yui/treeview/#start</a>