private void OnDeleteScreen(string screenName)
        {
            Nui.SendMessage(Events.DeleteScreen, screenName);

            var eventArgs = new ScreenDeletedEventArgs()
            {
                ScreenName = screenName
            };

            this.OnScreenDeleted(eventArgs);
        }
        private void OnScreenDeleted(ScreenDeletedEventArgs e)
        {
            var handler = this.ScreenDeleted;

            handler?.Invoke(this, e);
        }