public static async Task <IDisposable> Create(string content = null, bool closable = false, bool hideAppBar = true)
        {
            if (_counter == 0)
            {
                _overlay = new BusyOverlay(closable, content, hideAppBar);

                _overlay.Show();
            }

            _overlay.UpdateSize();

            _counter++;

            await Task.Delay(10);

            return(_overlay);
        }