code: public void buildSerializedFormSummaries(XMLNode node, Content serializedTree) {
          Content serializedSummariesTree = writer.getSerializedSummariesHeader();
          PackageDoc[] packages = configuration.packages;
          for (int i = 0; i < packages.length; i++) {
              currentPackage = packages[i];
              buildChildren(node, serializedSummariesTree);
          }
          serializedTree.addContent(writer.getSerializedContent(
                  serializedSummariesTree));
      }
docs: Build the serialized form summaries.
  
  @param node the XML element that specifies which components to document
  @param serializedTree content tree to which the documentation will be added