public function encode(Payload $payload): string
    {
        $data = [
            'aps' => $this->convertApsToArray($payload->getAps()),
        ];

        $data = array_merge($payload->getCustomData(), $data);

        return json_encode($data);
    }
public function encode(Payload $payload): string
    {
        $data = [
            'aps' => $this->convertApsToArray($payload->getAps()),
        ];

        $data = array_merge($payload->getCustomData(), $data);

        return json_encode($data);
    }
{@inheritdoc}