fact: Definition replaceMethDef (idx : Fin.t n') (newDef : methDef (Vector.nth methSigs idx)) : ilist (B:= @methDef Rep) methSigs := replace_Index _ methDefs idx newDef.
imports: Coq.Lists.List Coq.Strings.String Fiat.ADT.ADTSig Fiat.ADT.Core Fiat.Common Fiat.Common.BoundedLookup Fiat.Common.ilist Fiat.ADTNotation.BuildADTSig Fiat.ADTNotation.BuildADT