BeginGroup in WPF Devexpress Ribbon

Problem:
- I can't find "BeginGroup" in WPF Ribbon! is there any solution ...
- Does the silverlight ribbon bar items have the begingroup option? Can't find it anywhere.
- How do you do a BeginGroup in the application menu using WPF or SL ...

Solution:
Just used of a BarItemLinkSeparator in XAML instead of BeginGroup property.

XAML:
<dxr:RibbonPageGroup>
    <dxb:BarButtonItemLink BarItemName="barButtonItemFind" />
    <dxb:BarButtonItemLink BarItemName="barButtonItemBookmark" />
    <dxb:BarItemLinkSeparator />
    <dxb:BarButtonItemLink BarItemName="barButtonItemFirst"/>
    <dxb:BarButtonItemLink BarItemName="barButtonItemPrevious" />
    <dxb:BarButtonItemLink BarItemName="barButtonItemNext" />
    <dxb:BarButtonItemLink BarItemName="barButtonItemLast" />
</dxr:RibbonPageGroup>