It's really neat to see facebook's iOS team releasing so much of their work. This framework is probably not going to be that relevant to tons of use-cases, but

It's really neat to see facebook's iOS team releasing so much of their work. This framework is probably not going to be that relevant to tons of use-cases, but even if you'll never use it you'll probably get a lot out of looking at it closely and thinking about why it makes the decisions it does.