@Override
        public void possibleResultPoints(List<ResultPoint> resultPoints) {
            for (ResultPoint point : resultPoints) {
                viewFinder.addPossibleResultPoint(point);
            }
            delegate.possibleResultPoints(resultPoints);
        }
The instance of @link TorchListener to send events callback.
zxing-android-embedded/src/com/journeyapps/barcodescanner/DecoratedBarcodeView.java