{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"TyKind::Tuple(arity,"}]}
                TyKind::Tuple(arity, ..) => arity,
            Struct | Variant(_) | UnionField => match *ty.kind(Interner) {
                TyKind::Adt(AdtId(adt), ..) => {