code: protected Content getNavLinkDeprecated() {
          Content linkContent = getHyperLink(pathToRoot.resolve(DocPaths.DEPRECATED_LIST),
                  contents.deprecatedLabel, "", "");
          Content li = HtmlTree.LI(linkContent);
          return li;
      }
docs: Get "Deprecated" API link in the navigation bar.
  
  @return a content tree for the link