code: public void buildContent(XMLNode node, Content contentTree) {
          Content packageContentTree = packageWriter.getContentHeader();
          buildChildren(node, packageContentTree);
          contentTree.addContent(packageContentTree);
      }
docs: Build the content for the package doc.
  
  @param node the XML element that specifies which components to document
  @param contentTree the content tree to which the package contents
  will be added