Oskar Gewalli comments

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                                            Oskar Gewalli

Conseable types

Would `insert` make sense from a f# / .net perspective ?

Conseable types

Perhaps that the abstraction should be called Unfoldable and then we could add `cons` or `add`.

Add functions for Nullable<_>

What about `Nullable.ofOption` for going from option to a `Nullable` type?

Using setl and view for the same optic in one function gives error "The type Data.Identity does not match the type Data.Const"

This might be a bug, though I'm unsure.

Using setl and view for the same optic in one function gives error "The type Data.Identity does not match the type Data.Const"

Looks like this is how it should be (the compiler error). I'll see if I can find how this should be solved.

Using setl and view for the same optic in one function gives error "The type Data.Identity does not match the type Data.Const"

When I tried to do the equivalent in Haskell: ```Haskell setField valueOptic value updatedAtOptic now source = let oldVal = view valueOptic source in if value == oldVal then source...

Using setl and view for the same optic in one function gives error "The type Data.Identity does not match the type Data.Const"

What is it that you are trying to do @cmeeren ? Would it be solved by using less generic data lenses as [seen in F#x](https://github.com/fsprojects/FSharpx.Extras/blob/master/src/FSharpx.Extras/Lens.fs)?

Using setl and view for the same optic in one function gives error "The type Data.Identity does not match the type Data.Const"

Aether style lenses are equivalent to the lenses that can be found in FSharpX. Note the similarity of the type signatures of the two. They encode the same type of...