public void fillPositions(SaveRequest saveRequest, PurchaseEntity purchase, Collection<String> validatedProductTypes) {
                Map<String, List<PositionEntity>> sortedPositions = purchase.getPositions().stream()
                .filter(p -> p.getExciseToken() != null || p.isExcise()).collect(Collectors.groupingBy(PositionEntity::getProductType));
    }