code: public static HtmlTree A_ID(HtmlStyle styleClass, String id, Content body) {
          HtmlTree htmltree = A_ID(id, body);
          if (styleClass != null)
              htmltree.addStyle(styleClass);
          return htmltree;
      }
docs: Generates an HTML anchor tag with a style class, id attribute and a body.
  
  @param styleClass stylesheet class for the tag
  @param id id for the anchor tag
  @param body body for the anchor tag
  @return an HtmlTree object