public static bool AncientShardPurchaseLimitReached(this UserMagicShopData data, DateTime now) => default;
private static IUndoState UpdateAncientShardPurchaseIfNeeded(this UserMagicShopData data, MagicShopItem item, DateTime now) => default;
public static Account.Resources GetSlotPrice(this UserMagicShopData data, int slotNumber) => default;
public static UserMagicShopData AssertNotMaxSlots(this UserMagicShopData data) => default;
public static MagicShopItem SelectItem(this UserMagicShopData data, int id) => default;
public static IUndoState RemoveItem(this UserMagicShopData data, MagicShopItem item, DateTime now) => default;
public static UserMagicShopData AddItem(this UserMagicShopData data, MagicShopItem item) => default;
public static UserMagicShopData RemoveSlot(this UserMagicShopData data) => default;
// Extension methods public static IUndoState AddSlot(this UserMagicShopData data) => default;
