[Haskell-cafe] Side conditions on Data.Profunctor.Choice?

Hi, I was expecting to see coherence conditions for instances of Data.Profunctor.Choice along the lines of: dimap (either (Left . f) Right) id . right' === dimap id (either (Left . f) Right) . right' and similarly for left', but there's nothing like that in the docs. Does anyone know whether (a) those conditions aren't true in general, or (b) they are true but provable from other theorems so not worth mentioning? Many thanks, David