code: public void buildFieldHeader(XMLNode node, Content classContentTree) {
          if (currentClass.serializableFields().length > 0) {
              buildFieldSerializationOverview(currentClass, classContentTree);
          }
      }
docs: Build the field header.
  
  @param node the XML element that specifies which components to document
  @param classContentTree content tree to which the documentation will be added