private static void OnIsVisibleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
if (Equals(e.NewValue, true) &&
d is UIElement element &&
d.GetValue(TemplateProperty) is ControlTemplate template)
{
if (d.GetValue(AdornerProperty) is null)
{
var adorner = TemplatedAdorner.Create(element, template);
d.SetCurrentValue(AdornerProperty, adorner);
AdornerService.Show(adorner);
}
else
{
Debug.Assert(condition: false, message: $"Element {d} already has an info adorner.");
}
}