-m 16700 Filevault

A couple of days ago I read the tweet that -m 16700 Filevault is now supported.
Many thanks for this, because it has been a long time on the wish-list for many, including myself.

Now, maybe I missed it in the doc/commit, but can one give me a hint on how to recover the hash ?
Is it always on the some offset and it just needs some copy-pasting?
Even better, is there a script?

Thanks!