/**
* @param Merchant $merchant
* @param string $transactionID
*/
public function __construct(Merchant $merchant, $transactionID)
{
if (!is_string($transactionID)) {
throw new InvalidArgumentException("Parameter 'transactionID' must be of type string.");
}
parent::__construct();
$this->merchant = $merchant;
$this->transactionID = $transactionID;
}
