public static void generate(ConfigurationImpl configuration) {
        PackageIndexWriter packgen;
        String filename = "overview-summary.html";
        try {
            packgen = new PackageIndexWriter(configuration, filename);
            packgen.generatePackageIndexFile("doclet.Window_Overview_Summary", true);
            packgen.close();
        } catch (IOException exc) {
            configuration.standardmessage.error(
                        "doclet.exception_encountered",
                        exc.toString(), filename);
            throw new DocletAbortException();
        }
    }