Updated IPrefetchable implementation utilizing AACache

AAInventoryItemCache.cs

internal sealed class AAInventoryItemCache : IPrefetchable
    {
        private Dictionary<int, InventoryItem> _InventoryItems = new Dictionary<int, InventoryItem>();

        public void Prefetch()
        {
            _InventoryItems.Clear();

            foreach (InventoryItem item in AACache<InventoryItem>.SelectRecords())
            {
                _InventoryItems[item.InventoryID.Value] = item;
            }
        }

        private Dictionary<int, InventoryItem> InventoryItems
        {
            get
            {
                return _InventoryItems;
            }
        }

        public static InventoryItem GetInventoryItem(int inventoryID)
        {
            AAInventoryItemCache cache = GetSlot();

            cache.InventoryItems.TryGetValue(inventoryID, out InventoryItem item);

            return item;
        }

        public static AAInventoryItemCache GetSlot()
        {
            return PXDatabase.GetSlot<AAInventoryItemCache>(typeof(AAInventoryItemCache).FullName, typeof(InventoryItem));
        }
    }