/**
* Make a refundReversal API request.
*
* This method wraps the LitleOnlineRequest.
*
* @param array $hash_in
* The request data.
*
* @return DOMDocument|SimpleXMLElement
* The response.
*/
public function refundReversalRequest($hash_in)
{
return $this->request->refundReversalRequest($hash_in);
}