private static object CoerceItemContainerStyle(DependencyObject d, object baseValue)
{
RibbonGalleryCategory category = (RibbonGalleryCategory)d;
return PropertyHelper.GetCoercedTransferPropertyValue(category,
baseValue,
ItemsControl.ItemContainerStyleProperty,
category.RibbonGallery,
RibbonGallery.GalleryItemStyleProperty);
}