code: public static HtmlTree META(String name, String content) {
          HtmlTree htmltree = new HtmlTree(HtmlTag.META);
          htmltree.addAttr(HtmlAttr.NAME, nullCheck(name));
          htmltree.addAttr(HtmlAttr.CONTENT, nullCheck(content));
          return htmltree;
      }
docs: Generates a META tag with the name and content attributes.
  
  @param name name attribute
  @param content type of content
  @return an HtmlTree object for the META tag