{-
look for https://gist.github.com/Icelandjack/aecf49b75afcfcee9ead29d27cc234d5
and https://gist.github.com/Icelandjack/02069708bc75f4284ac625cd0e2ec81f/6cb8f671d5bbc8592557e5c7a5a5c224a9663973
and https://functional.works-hub.com/learn/yo-yoneda-a2965
-}
