Bagaimana untuk mengembalikan ralat dari janji dalam?

func (k *buffer) sendAll() error {
    for _, record := range k.buffer {
        kgo.Produce(ctx, &record, func(r *kgo.Record, err error) {
            if err != nil {
                fmt.Printf("record had a produce error: %v\n", err)
                
                // How do I return an error here and exit sendAll function?
                
            }
        })
    }
    return nil
}

func (k *buffer) sendAll() error {

    var loop error

    for _, record := range k.buffer {
        if loop != nil {
            break
        }
        kgo.Produce(ctx, &record, func(r *kgo.Record, err error) {
           
            if err != nil {
                fmt.Printf("record had a produce error: %v\n", err)
                
                // How do I return an error here and exit sendAll function?
                loop = err
            }
        })
    }
    return loop
}