{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"BuiltinLintDiag::ExternCrateNotIdiomatic"}]}
        BuiltinLintDiag::ExternCrateNotIdiomatic { vis_span, ident_span } => {
        }
            let suggestion_span = vis_span.between(ident_span);