if (m_FirstBatchDone) {
if (isFirstBatchDone()) {
  public boolean input(Instance instance) {    if (getInputFormat() == null) {      throw new IllegalStateException("No input instance format defined");    }    if (m_NewBatch) {      resetQueue();      m_NewBatch = false;    }    if (m_FirstBatchDone) {      push(instance);      return true;    } else {      bufferInput(instance);      return false;    }  }