{"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"CtorKind::Fn"}]}
                    CtorKind::Fn => {
                    CtorKind::Const => false,
                        !self.r.field_idents(def_id).is_some_and(|field_ids| field_ids.is_empty())