code: public void buildClassSerializedForm(XMLNode node, Content packageSerializedTree)
              throws DocletException {
          Content classSerializedTree = writer.getClassSerializedHeader();
          SortedSet<TypeElement> typeElements = utils.getAllClassesUnfiltered(currentPackage);
          for (TypeElement typeElement : typeElements) {
              currentTypeElement = typeElement;
              fieldWriter = writer.getSerialFieldWriter(currentTypeElement);
              methodWriter = writer.getSerialMethodWriter(currentTypeElement);
              if (utils.isClass(currentTypeElement) && utils.isSerializable(currentTypeElement)) {
                  if (!serialClassInclude(utils, currentTypeElement)) {
                      continue;
                  }
                  Content classTree = writer.getClassHeader(currentTypeElement);
                  buildChildren(node, classTree);
                  classSerializedTree.addContent(classTree);
              }
          }
          packageSerializedTree.addContent(classSerializedTree);
      }
docs: Build the class serialized form.
  
  @param node the XML element that specifies which components to document
  @param packageSerializedTree content tree to which the documentation will be added
  @throws DocletException if there is a problem while building the documentation