That was changed to darktable UCS. Please read this for why:
I’m not convinced by this implementation. In particular, I’m not sure about replicating masking inside the module. And it lacks some of the flexibility I’m aiming for. But there are some points that I don’t think I have adequately covered in my own design, so I’ll be looking at that.
There are a few things I need to get out of the way first, but I expect to start coding in a month or so.