public virtual void OnQRCode(Microsoft.MixedReality.QR.QRCode code, QREventType eventType)
 {
     Debug.Log("QRCodeListener  " + eventType);
     lock (pendingActions)
     {
         pendingActions.Enqueue(new ActionData(eventType, code));
     }
 }
 public ActionData(QREventType type, Microsoft.MixedReality.QR.QRCode qRCode) : this()
 {
     this.type = type;
     qrCode    = qRCode;
 }