adamrt

    - https://sr.ht/~jprotopopov/kefir/#goals-and-priorities
    - https://sr.ht/~jprotopopov/kefir/#history-and-future-plans

    const item = for (let sample .. items) {
        if (item.key == key) {
            break item;
        };
    } else { ... };

    if err == nil { // inverted
        return err
    }