throw new IllegalStateException("Helper is NOT ready");
throw new IllegalStateException(Messages.getString("SFHelper.9"));
  void startSigning() throws IOException  {    if (this.state != READY)      throw new IllegalStateException("Helper is NOT ready");    Manifest oldManifest = jar.getManifest();    this.manifest = oldManifest == null ? new Manifest()                                        : new Manifest(oldManifest);    this.sfMainAttributes = new Attributes();    this.sfEntries = new HashMap();    util = new HashUtils();    this.state = STARTED;  }