Output::getCallbackUrl

public function getCallbackUrl(): Result
{
	$result = clone $this->result;

	if (
		$this->sender instanceof MessageServiceSenderBase
		&& $result->isSuccess()
	)
	{
		$callbackUrl = $this->sender->getCallbackUrl();
		$result->setData(['url' => $callbackUrl]);
	}

	return $result;
}