Consultation about extension for optical flow

[Tiam2Y]

@feihuzhang ,Thank you for the code and paper. When I read the paper, it said that domain-invariant can be easily extended to the field of optical flow.
But I want to ask, for example, which part of PWC-Net should the Domain Norm be added to? (just like Domain Norm is added to the feature extraction and Guidance branch of DSMNet)