fact: Definition DecodeOpt2_fmap_id {S} : forall (a_opt : option S), DecodeOpt2_fmap id a_opt = a_opt.
imports: Coq.Lists.List Fiat.Common Fiat.Computation.Core Fiat.Computation.Notations Fiat.Narcissus.Common.Notations Fiat.Narcissus.Common.Monoid Fiat.Narcissus.Stores.Cache