private static function buildCheckoutUrl(PagSeguroConnectionData $connectionData, $code)
 {
     return $connectionData->getPaymentUrl() . $connectionData->getResource('checkoutUrl') . "?code={$code}";
 }
 private static function buildPreApprovalRequestUrl(PagSeguroConnectionData $connectionData, $code)
 {
     return $connectionData->getPaymentUrl() . $connectionData->getResource('requestUrl') . "?code={$code}";
 }