in topic.go [106:116]
func (p *MNSTopic) GetSubscriptionAttributes(subscriptionName string) (attr SubscriptionAttribute, err error) {
subscriptionName = strings.TrimSpace(subscriptionName)
if err = checkTopicName(subscriptionName); err != nil {
return
}
_, err = send(p.client, p.decoder, GET, nil, nil, fmt.Sprintf("topics/%s/subscriptions/%s", p.name, subscriptionName), &attr)
return
}