public PackSourceChecker(IEnumerable <IPackProvider> packProviders, PackPreFilterer packPreFilterer, IReadOnlyList <IAdditionalDataProducer> additionalDataProducers, bool saveCandidatePacks)
{
_packProviders = packProviders;
_packPreFilterer = packPreFilterer;
_additionalDataProducers = additionalDataProducers;
_saveCandidatePacks = saveCandidatePacks;
_packChecker = new PackChecker();
}