Подскажите плиз логику данного метода
private void recalculatePurchasedObjectPermissions(long objectId, ReferencedObjectType objectType) {
List<String> objectProductsIds = purchaseService.getObjectProducts(objectId, objectType)
.stream()
.map(productToReferencedObject -> productToReferencedObject.getProduct().getProductId())
.collect(Collectors.toList());
revokeAccessViaRemovedProducts(objectId, objectType, objectProductsIds);
grantAccessViaAddedProducts(objectId, objectType, objectProductsIds);
}