code: public static Attribute<HtmlTag> head( Attribute<HtmlTag> tag, Attribute<Void>... attributes )
      {
          return head( tag.name(), tag::value, attributes );
      }
docs: Generate html tags for use in {@link HtmlTag.Html#head &lt;head&gt;}.
  
  Allows adding attributes to a head tag.
  
  @param tag        the name and contents of the head tag.
  @param attributes the attributes of the head tag.
  @return an object that generates the tag in the head.