code: public void buildClassSummary(XMLNode node, Content packageSummaryContentTree) {
          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 = pkg.ordinaryClasses();
          if (classes.length > 0) {
              profileWriter.addClassesSummary(
                      classes,
                      configuration.getText("doclet.Class_Summary"),
                      classTableSummary, classTableHeader, packageSummaryContentTree);
          }
      }
docs: Build the summary for the classes in the package.
  
  @param node the XML element that specifies which components to document
  @param packageSummaryContentTree the tree to which the class summary will
  be added