func (s *Subscription) PushLink(title, u, body string) error {
	return s.Client.PushLinkToChannel(s.Channel.Tag, title, u, body)
}
func (s *Subscription) PushLink(title, u, body string) error {
	return s.Client.PushLinkToChannel(s.Channel.Tag, title, u, body)
}
// PushNote sends a link to the specific Channel with the given title, url and body