{"ast_node_type":"variable","tokens":[{"end":71,"kind":"keyword","start":0,"text":"let"}]}
                let sp = struct_field.span.with_ctxt(self.span.ctxt());
                // `PartialEq::eq`, one for each of `&self` and `other`.
                let mut exprs: Vec<_> = mk_exprs(i, struct_field, sp);