{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"variant_data.field(&x.name).ok_or(MirLowerError::UnresolvedField)?;"}]}
                            variant_data.field(&x.name).ok_or(MirLowerError::UnresolvedField)?;
                        let field_id =
                        Ok((