{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
            let span = delegation.path.segments.last().unwrap().ident.span;
        self.with_rib(ValueNS, RibKind::FnOrCoroutine, |this| {
            let ident = Ident::new(kw::SelfLower, span.normalize_to_macro_rules());