{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
            let mut span = until_within(item_span, ident.span);
        fn named_span(item_span: Span, ident: Ident, generics: Option<&Generics<'_>>) -> Span {
            if let Some(g) = generics