code: public void buildClassSummary(XMLNode node, Content summaryContentTree) {
          String classTableSummary =
                  configuration.getText("doclet.Member_Table_Summary",
                  configuration.getText("doclet.Class_Summary"),
                  configuration.getText("doclet.classes"));
          String[] classTableHeader = new String[] {
              configuration.getText("doclet.Class"),
              configuration.getText("doclet.Description")
          };
          ClassDoc[] classes =
                  packageDoc.isIncluded()
                          ? packageDoc.ordinaryClasses()
                          : configuration.classDocCatalog.ordinaryClasses(
                                  Util.getPackageName(packageDoc));
          if (classes.length > 0) {
              profilePackageWriter.addClassesSummary(
                      classes,
                      configuration.getText("doclet.Class_Summary"),
                      classTableSummary, classTableHeader, summaryContentTree);
          }
      }
docs: Build the summary for the classes in this package.
  
  @param node the XML element that specifies which components to document
  @param summaryContentTree the summary tree to which the class summary will
  be added