public function sendStatusUpdate($txt)
    {
        $child = new ProtocolNode('status', null, null, $txt);
        $nodeID = $this->createIqId();
        $node = new ProtocolNode('iq',
            [
                'to'    => Constants::WHATSAPP_SERVER,
                'type'  => 'set',
                'id'    => $nodeID,
                'xmlns' => 'status',
            ], [$child], null);

        $this->sendNode($node);
        $this->eventManager()->fire('onSendStatusUpdate',
            [
                $this->phoneNumber,
                $txt,
            ]);
    }