code: public static void generate(ConfigurationImpl configuration) {
          PackageIndexFrameWriter packgen;
          DocPath filename = DocPaths.OVERVIEW_FRAME;
          try {
              packgen = new PackageIndexFrameWriter(configuration, filename);
              packgen.buildPackageIndexFile("doclet.Window_Overview", false);
              packgen.close();
          } catch (IOException exc) {
              configuration.standardmessage.error(
                          "doclet.exception_encountered",
                          exc.toString(), filename);
              throw new DocletAbortException(exc);
          }
      }
docs: Generate the package index file named "overview-frame.html".
  @throws DocletAbortException