Is there any documentation?

[ForceBru]

For instance, how does one learn how to use TwiceDifferentiableConstraints? ?TwiceDifferentiableConstraints says "No documentation found". The documentation of Optim.jl uses it in the IPNewton tutorial, but doesn't explain what it is and what the options mean.

I learned that TwiceDifferentiableConstraints supports autodiff from a GitHub issue, and before that I was painfully calculating Hessians by hand, as shown in the Optim.jl documentation. I can only imagine how many mistakes people made when calculating constraints' Hessians by hand (unless it's widely known that TwiceDifferentiableConstraints supports autodiff).