No, it is hidden behind HFM API. It is important to know the algorithm which a dapp needs to implement, and understand that application can work with reversible blocks (micro-fork can abandon such blocks), but it is possible to works only with irreversible blocks. But of course, it would be good to know what happens in the guts of HFM when some blocks become abandoned - it is a good topic for the next post, I think.
RE: When You want to write a HAF application, then first read The HIve Fork Manager documentation