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