static RibbonApplicationSplitMenuItem()
{
Type ownerType = typeof(RibbonApplicationSplitMenuItem);
DefaultStyleKeyProperty.OverrideMetadata(ownerType, new FrameworkPropertyMetadata(ownerType));
IsSubmenuOpenProperty.OverrideMetadata(ownerType, new FrameworkPropertyMetadata(null, new CoerceValueCallback(CoerceIsSubmenuOpen)));
}