return "secondCarOwnerId";
return parkingDocument.getParkingFile().getFilename();
    public String getSecondCarOwnerIdFileName() {        for (ParkingDocument parkingDocument : getParkingDocuments()) {            if (parkingDocument.getParkingDocumentType().equals(ParkingDocumentType.SECOND_CAR_OWNER_ID)) {                return "secondCarOwnerId";            }        }        return "";    }