public PackageTreeWriter(ConfigurationImpl configuration,
                             String path, String filename,
                             PackageDoc packagedoc,
                             PackageDoc prev, PackageDoc next)
                      throws IOException {
        super(configuration, path, filename,
              new ClassTree(
                configuration.classDocCatalog.allClasses(packagedoc),
                configuration),
              packagedoc);
        this.packagedoc = packagedoc;
        this.prev = prev;
        this.next = next;
    }