{"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"let"}]}
            let def = self.create_def(field.id, Some(name), DefKind::Field, field.span);
            let name = field.ident.map_or_else(|| sym::integer(index(self)), |ident| ident.name);
            self.with_parent(def, |this| visit::walk_field_def(this, field));