fact: Definition ValidLookup (r : Ensemble (Key * Value)) (k : Key) (v : option Value) : Prop := forall v', v = Some v' -> r (k, v').
imports: Coq.Sets.Ensembles Coq.Lists.List Coq.Strings.String Fiat.Common Fiat.Computation Fiat.ADT.ADTSig Fiat.ADT.Core Fiat.ADT.ComputationalADT Fiat.Common.BoundedLookup Fiat.Common.ilist Fiat.ADTNotation.BuildADTSig Fiat.Common.Coq__8_4__8_5__Compat