code: public static void generate(ConfigurationImpl configuration,
                                  ClassUseMapper mapper, PackageElement pkgElement)
              throws DocFileIOException {
          DocPath filename = DocPaths.PACKAGE_USE;
          PackageUseWriter pkgusegen = new PackageUseWriter(configuration, mapper, filename, pkgElement);
          pkgusegen.generatePackageUseFile();
      }
docs: Generate a class page.
  
  @param configuration the current configuration of the doclet.
  @param mapper        the mapping of the class usage.
  @param pkgElement    the package being documented.
  @throws DocFileIOException if there is a problem generating the package use page