Checking Kafka topic existence in Golang

type Kafka struct {
	config  *sarama.Config
	brokers []string
}

func (k Kafka) CheckTopics(topics []string) error {
	admin, err := sarama.NewClusterAdmin(k.brokers, k.config)
	if err != nil {
		return err
	}
	defer admin.Close()

	list, err := admin.ListTopics()
	if err != nil {
		return err
	}

	for _, topic := range topics {
		if _, ok := list[topic]; !ok {
			return fmt.Errorf("topic is not found: %s", topic)
		}
	}

	return nil
}