LinkValue / MobileNotif

     *

     * @return self

     */

    public function addData($key, $value)

    {

        if (!is_string($key) && !is_int($key)) {

            throw new \InvalidArgumentException('Data keys must be of type "string" or "integer".');

        }

        $data = $this->getData();

        $data[$key] = $value;

        return $this->setData($data);

    }

    /**

     * Get the value of the payload "alert" key.

     *

     * @return self

     */

    public function addData($key, $value)

    {

        if (!is_string($key)) {

            throw new \InvalidArgumentException('Data keys must be of type string in order to convert data in a valid JSON Object.');

        }

        $data = $this->getData();

        $data[$key] = $value;

        return $this->setData($data);

    }

}