private static void OnFilterItemTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RibbonGallery gallery = (RibbonGallery)d;
// Reapply the FilterItemTemplateSelector coercion.
gallery.CoerceValue(RibbonGallery.FilterItemTemplateSelectorProperty);
gallery.CoerceValue(RibbonGallery.CurrentFilterTemplateProperty);
}