FaceDetector constructor Null safety

Implementation

factory FaceDetector([Map? faceDetectorOptions]) {
  if (faceDetectorOptions != null) {
    var faceDetectorOptions_1 =
        convertDartToNative_Dictionary(faceDetectorOptions);
    return FaceDetector._create_1(faceDetectorOptions_1);
  }
  return FaceDetector._create_2();
}