private synchronized void clearMemos() { _ats = null; _lasttype=-1; _lastindex=-1; _rs = null;
private void clearMemos() { synchronized (avResults) { _ats = null; _lasttype=-1; _lastindex=-1; }
  private synchronized void clearMemos() {    _ats = null;    _lasttype=-1;    _lastindex=-1;    _rs = null;  }