{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"TyKind::Tuple(_,"}]}
                TyKind::Tuple(_, substs) => {
            let (field_id, parameters) = match derefed_ty.kind(Interner) {
                    return name.as_tuple_index().and_then(|idx| {