code: public static HtmlTree TH(HtmlStyle styleClass, String scope, Content body) {
          HtmlTree htmltree = new HtmlTree(HtmlTag.TH, nullCheck(body));
          if (styleClass != null)
              htmltree.addStyle(styleClass);
          htmltree.addAttr(HtmlAttr.SCOPE, nullCheck(scope));
          return htmltree;
      }
docs: Generates a TH tag with style class and scope attributes and some content.
  
  @param styleClass style for the tag
  @param scope scope of the tag
  @param body content for the tag
  @return an HtmlTree object for the TH tag