fromJson static method
Implementation
@visibleForTesting
static FaceCaptureResponse? fromJson(jsonObject) {
  if (jsonObject == null) return null;
  var result = new FaceCaptureResponse._privateConstructor();
  result._image = FaceCaptureImage.fromJson(jsonObject["image"]);
  result._error = FaceCaptureException.fromJson(jsonObject["error"]);
  return result;
}