{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"inner_ty.type_arguments().nth(1).zip(body_ty.type_arguments().nth(1));"}]}
                    inner_ty.type_arguments().nth(1).zip(body_ty.type_arguments().nth(1));
                let error_type_args =
                if let Some((inner, body)) = error_type_args {