HuaweiPushKitMessage::getBatch

public function getBatch(): string
{
	$data = $this->getPayload();
	$batch = "Content-type: application/jsonrn";
	$batch .= "Content-length: " . strlen($data) . "rn";
	$batch .= "rn";
	$batch .= $data;

	return base64_encode($batch);
}