code: func SendXmpp(senderId, apiKey string, m XmppMessage) (string, int, error) {
  	c, err := newXmppGcmClient(senderId, apiKey)
  	if err != nil {
  		return "", 0, fmt.Errorf("error creating xmpp client>%v", err)
  	}
  	return c.send(m)
  }
docs: // SendXmpp sends a message using the XMPP GCM connection server.