Net.fromOnnxBytes constructor
      
      Net.fromOnnxBytes(
    
- Uint8List bufferModel
Reads a network model from ONNX in-memory buffer.
https://docs.opencv.org/4.x/d6/d0f/group__dnn.html#gac1a00e8bae54070e5837c15b1482997d
Implementation
factory Net.fromOnnxBytes(Uint8List bufferModel) {
  final p = calloc<cvg.Net>();
  final bufM = VecUChar.fromList(bufferModel);
  cvRun(() => cdnn.cv_dnn_Net_readNetFromONNXBytes(bufM.ref, p, ffi.nullptr));
  final net = Net._(p);
  return net;
}