copyStringValues(inst, true, inst.dataset(), getOutputFormat());
  public boolean input(Instance instance) throws Exception {    if (getInputFormat() == null) {      throw new Exception("No input instance format defined");    }    if (m_NewBatch) {      resetQueue();      m_NewBatch = false;    }    Instance inst = (Instance)instance.copy();    inst.setDataset(null);    inst.insertAttributeAt(m_Insert);    inst.setDataset(outputFormat());    push(inst);    return true;  }