System.err.println("Notifying customizer...");
  public void acceptInstance(InstanceEvent e) {    if (e.getStatus() == InstanceEvent.FORMAT_AVAILABLE) {      //      Instances dataSet = e.getInstance().dataset();      m_connectedFormat = e.getStructure();            //      System.err.println("Assigning class column...");      assignClass(m_connectedFormat);      notifyInstanceListeners(e);      // tell any listening customizers (or other interested parties)      notifyDataFormatListeners();    } else {      //      Instances dataSet = e.getInstance().dataset();      //      assignClass(dataSet);      notifyInstanceListeners(e);    }  }