Method add

src/services/notificationService.ts:106–123

(
        items: INotificationItem<T>[]
    )

    }

    public add<T>(
        items: INotificationItem<T>[]
    ): null | INotificationItem<T>[] {
        const { data = [] } = this.state;

        if (items && items.length) {
            items.forEach((item) => {
                if (item.id === undefined) item.id = randomId();
                item.status = NotificationStatus.WaitRead;
            });
            const arr = [...data, ...items];
            this.setState({
                data: arr,
            });
            return items;
        }
        return null;
    }

    public clear() {
        this.setState({