{"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
                let struct_data = id.fields(self.db);
            while let Some((AdtId::StructId(id), subst)) = ty.as_adt() {
                if let Some((last_field, _)) = struct_data.fields().iter().next_back() {