{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
            let suggestion_span = vis_span.between(ident_span);
        BuiltinLintDiag::ExternCrateNotIdiomatic { vis_span, ident_span } => {
            let code = if vis_span.is_empty() { "use " } else { " use " };