/**
* Exception constructor
*
* @param string $code
* SLS error code.
* @param string $message
* detailed information for the exception.
* @param string $requestId
* the request id of the response, '' is set if client error.
*/
public function __construct($code, $message, $requestId = '')
{
parent::__construct($message);
$this->code = $code;
$this->message = $message;
$this->requestId = $requestId;
}
