Can I add MenuGroup in RibbonDropDownGallery dynamicly?

[rulai-yinqiang]

All I want is a menu separator line in RibbonDropDownGallery dropdown Commands list menus, I don't need Category header.

In Ribbon Tools, I can add Menu group, and add Button in the menu group.

I wonder can I add MenuGroup in RibbonDropDownGallery dynamicly?

[harborsiem]

MenuGroup is only allowed in DropDownGallery.MenuGroups markup element. Not available for ItemsSource.

[rulai-yinqiang]

What types are available for ItemsSource?

Can I add RibbonDropDownGallery in ItemsSource?

[harborsiem]

I don't have much experience about controls in ItemsSource. Microsoft documentation don't say anything. But I think the only possible controls are RibbonButton, RibbonToggleButton.