{"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"Ok(_)"}]}
                Ok(_) => {
            match self.expect_one_of(&[exp!(Comma)], &[close]) {
                    if let Ok(f) = parsed_field.or_else(|guar| field_ident(self, guar).ok_or(guar))