{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"(&ty::Tuple(elem_tys),"}]}
                (&ty::Tuple(elem_tys), hir::TyKind::Tup(elem_hir_tys)) => {
                // with the HIR types:
                    search_stack.extend(iter::zip(elem_tys, *elem_hir_tys));