{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"OnDuplicate::WarnButFutureError"}]}
            OnDuplicate::WarnButFutureError => cx.warn_unused_duplicate_future_error(used, unused),
            OnDuplicate::Warn => cx.warn_unused_duplicate(used, unused),
            OnDuplicate::Error => {