bryglen\apnsgcm\ApnsGcm::getGcmClient PHP Method

    public function getGcmClient()
    {
        if ($this->_gcmClient === null) {
            $component = $this->gcm;
            $client = \Yii::$app->get($component);
            $this->_gcmClient = $client;
        }
        return $this->_gcmClient;
    }