public static StaticArena3x3ShopItemData AssertShopItemExist(this StaticArena3X3Data staticData, int id) => default;
public static List <StaticArena3x3ShopItemData> ShopItems(this StaticArena3X3Data staticData) => default;
public static StaticArena3x3ShopItemData ShopItemBy(this StaticArena3X3Data staticData, int slotId) => default;
public static bool IsEnabled(this StaticArena3X3Data staticData, DateTime now) => default;