code: public static void generate(ConfigurationImpl configuration,
              IndexBuilder indexBuilder) throws DocFileIOException {
          if (configuration.frames) {
              generate(configuration, indexBuilder, DocPaths.ALLCLASSES_FRAME, true);
              generate(configuration, indexBuilder, DocPaths.ALLCLASSES_NOFRAME, false);
          } else {
              generate(configuration, indexBuilder, DocPaths.ALLCLASSES, false);
          }
      }
docs: Create AllClassesFrameWriter object. Then use it to generate the
  "allclasses-frame.html" file. Generate the file in the current or the
  destination directory.
  
  @param indexBuilder IndexBuilder object for all classes index.
  @throws DocFileIOException