Unfortunately, by "very complex and hard to understand" I also implicitly meant "[...] and I don't understand it myself well enough to explain it to someone els

Unfortunately, by "very complex and hard to understand" I also implicitly meant "[...] and I don't understand it myself well enough to explain it to someone else", sorry. I don't know whether it's because I haven't found a good enough explanation of that magic yet, or whether it's because it's something on the level of Haskell monads.