{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"err.span_label(span,"}]}
            err.span_label(span, format!("{kind_new} borrow occurs here"));
            // If `msg_new` is empty, then this isn't a borrow of a union field.
            err.span_label(old_span, format!("{kind_old} borrow occurs here"));