proposition: Lemma PositiveMap_elements_iff' {A m kv} : @PositiveMap.find A (fst kv) m = Some (snd kv) <-> In kv (PositiveMap.elements m).
proof: Proof. destruct kv; apply PositiveMap_elements_iff. Qed.
imports: Coq.Init.Wf Coq.Numbers.BinNums Coq.Arith.Arith Coq.FSets.FMapPositive Fiat.Parsers.ContextFreeGrammar.Carriers Fiat.Parsers.ContextFreeGrammar.PreNotations Fiat.Parsers.Splitters.RDPList Fiat.Parsers.BaseTypes Fiat.Parsers.ContextFreeGrammar.Fix.Definitions Fiat.Parsers.ContextFreeGrammar.Fix.Properties Fiat.Common.FMapExtensions.Wf Fiat.Common Fiat.Common.OptionFacts Fiat.Common.SetoidInstances