public void UpdateValue(BeerProviderQuantity beerProviderQuantity)
{
Value = beerProviderQuantity.Value;
}
public BeerProvider(BeerProviderQuantity beerProviderQuantity, Beer beer, Provider provider) : this()
{
BeerProviderQuantity = beerProviderQuantity ?? throw new ArgumentNullException($"{nameof(BeerProviderQuantity)} cannot be null");
Beer = beer ?? throw new ArgumentNullException($"{nameof(Beer)} cannot be null");
Provider = provider ?? throw new ArgumentNullException($"{nameof(Provider)} cannot be null");
}