public override void OnScrollStateChange(object sender, ScrollStateChangeEventArgs e)
 {
     ScrollListener?.OnScrollStateChange(sender, e);
     ScrollStateChangeCommand?.Execute(e);
 }
 public void OnScrollStateChange(object sender, ScrollStateChangeEventArgs e)
 {
     System.Diagnostics.Debug.WriteLine($"ScrollStateChangeEventArgs Y: {e.ScrollY}");
 }