Port of Lens sample from mausch (#123)
Port of Lens sample from mausch (#123)

* Port of Lens sample from mausch


Co-authored-by: mausch <d63de912658ceabb4fd5c1096963eac056155a26@gmail.com>

gusty/FSharpPlus,gmpl/FSharpPlus,gmpl/FSharpPlus,gusty/FSharpPlus