Below code, i am using for detecting face and eye in flutter, i am detecting face successfully using firebase google ml kit but problem is that while detecting eyes (leftEyeOpenProbability and rightEyeOpenProbability) always getting null.

Below is my code:

 `Future<void> detectFacesInImage(String imagePath) async
  {
    final File imageFile = File(imagePath);
    final InputImage inputImage = InputImage.fromFile(imageFile);
    final FaceDetector faceDetector = GoogleMlKit.vision.faceDetector();
    var landmarkMode = faceDetector.;
    try {
      final List<Face> faces = await faceDetector.processImage(inputImage);
      if (faces.isEmpty)
      {
              /// No faces detected in the image
              print('No faces detected in the image');
              showCustomSnackbar(title: 'error', message: 'No faces detected in the image', backgroundColor: Colors.red);
              return;
            }

            for (Face face in faces)
            {
              print('enter in face');
              /// Access the right eye open probability
              final double? leftEyeOpenProbability = face.leftEyeOpenProbability;
              if (leftEyeOpenProbability != null) {
                print('Left eye open probability: $leftEyeOpenProbability');
              } else {
                print('Left eye open probability: $leftEyeOpenProbability');
                showCustomSnackbar(title: 'error', message: 'Left eye open probability not available', backgroundColor: Colors.red);
                return;
              }
              /// Access the right eye open probability
              final double? rightEyeOpenProbability = face.rightEyeOpenProbability;
              if (rightEyeOpenProbability != null) {
                print('Right eye open probability: $rightEyeOpenProbability');
              } else {
                print('Right eye open probability: $rightEyeOpenProbability');
                showCustomSnackbar(title: 'error', message: 'Right eye open probability not available', backgroundColor: Colors.red);
                return;
              }

            }
    } catch (e) {
      showCustomSnackbar(title: 'error', message: 'Error detecting faces', backgroundColor: Colors.red);
      print('Error detecting faces: $e');
    } finally {
      /// showCustomSnackbar(title: 'error', message: 'succes', backgroundColor: Colors.red);
      faceDetector.close();
    }
  }`

I am expecting when eyes open, it should return some probability value of left and right open.