fact: Definition DecTuple2 {n} attrs := @Tuple2 (BuildHeading2 (n := n) attrs).
imports: Coq.Lists.List Coq.Strings.String Coq.Logic.FunctionalExtensionality Coq.Sets.Ensembles Fiat.Common.ilist2 Fiat.Common.StringBound Coq.Program.Program Fiat.QueryStructure.Specification.Representation.Heading2 Fiat.Common.Ensembles.IndexedEnsembles Fiat.QueryStructure.Specification.Representation.Notations