System.err.println("data: " + list);
  public void run() throws jjtraveler.VisitFailure, java.io.IOException {      RoloList list = RoloList.fromTerm(factory.readFromFile(directory + "/rolodex.trm"));      System.err.println("data: " + list);      Collector c = new Collector();      jjtraveler.Visitor tester = new jjtraveler.BottomUp(c);      tester.visit(list);      System.err.println("result: " + c.concatenation);      testAssert(c.concatenation.equals("voice(1)voice(2)voice(3)"),"bottom-up");  }