fact: Definition cMethods {Sig : ADTSig} (c : cADT Sig) (idx : MethodIndex Sig) : cMethodType (cRep c) (fst (MethodDomCod Sig idx)) (snd (MethodDomCod Sig idx)) := pcMethods (projT2 c) idx.
imports: Fiat.Common Fiat.Computation Fiat.ADT.ADTSig Fiat.ADT Coq.Sets.Ensembles