/**
  * Build the sub component if there is anything to document.
  *
  * @param node the XML element that specifies which components to document.
  * @param contentTree content tree to which the documentation will be added
  */
 @Override
 public void build(XMLNode node, Content contentTree) {
   if (hasMembersToDocument()) {
     super.build(node, contentTree);
   }
 }