code: public static void generate(ConfigurationImpl configuration) throws DocFileIOException {
          DocPath filename = DocPaths.overviewSummary(configuration.frames);
          ModuleIndexWriter mdlgen = new ModuleIndexWriter(configuration, filename);
          mdlgen.buildModuleIndexFile("doclet.Window_Overview_Summary", true);
      }
docs: Generate the module index page for the right-hand frame.
  
  @param configuration the current configuration of the doclet.
  @throws DocFileIOException if there is a problem generating the module index page