public static bool LimitReached(this UserInboxData inboxData) => default;
public static IUndoState RemoveItemIfLimitReached(this UserInboxData inboxData) => default;
public static UserInboxData RemoveNotValidItems(this UserInboxData inboxData, DateTime time) => default;
public static IUndoState RemoveItem(this UserInboxData data, InboxItem item) => default;
public static InboxItem RemoveItemById(this UserInboxData data, int itemId) => default;
public static InboxItem AssertHasItem(this UserInboxData inboxData, int id) => default;
public static InboxItem GetItem(this UserInboxData inboxData, int id) => default;
public static List <int> GetExpiredEffectIds(this UserInboxData data, DateTime time) => default;
public static IUndoState AddItems(this UserInboxData data, IEnumerable <InboxItem> newItems) => default;
// Extension methods public static IUndoState AddItem(this UserInboxData data, InboxItem newItem) => default;