[Extensions] How to UXML for ToolbarMenu entries ?

Hello All !

I'm playing a bit with the new UiElements UXML / UCSS editor functionalties to build a simple editor window and I'm wondering How is working the editor:ToolbarMenu ? I couldn't find a way to add sub-menu entries as the UXML node couldn't take childrens... I'm a bit lost
How is it possible to do that ?

Code (CSharp):

1. <?xml version="1.0" encoding="utf-8"?>
2. <engine:UXML
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.     xmlns:engine="UnityEngine.UIElements"
5.     xmlns:editor="UnityEditor.UIElements"
6.     xmlns:upm="UnityEditor.PackageManager.UI"
7.  
8. xsi:noNamespaceSchemaLocation="../../UIElementsSchema/UIElements.xsd"
9. xsi:schemaLocation="
10.                        UnityEngine.UIElements ../../UIElementsSchema/UnityEngine.UIElements.xsd
11.                        UnityEditor.UIElements ../../UIElementsSchema/UnityEditor.UIElements.xsd
12.                        UnityEditor.PackageManager.UI ../../UIElementsSchema/UnityEditor.PackageManager.UI.xsd
13.                        UnityEditor.Experimental.GraphView ../../UIElementsSchema/UnityEditor.Experimental.GraphView.xsd
14. "
15. >
16.     <engine:Label text="Hello World! From UXML" />
17.     <editor:Vector3Field label="test"/>
18.   <editor:Toolbar name="test">
19.     <editor:ToolbarMenu text="test" name="testMenu">
20.       <!-- I Feel that there should be something there but it's not working correctely :'( Heeelllpppp-->
21.     </editor:ToolbarMenu>
22.  
23.     <editor:ToolbarButton text="btn"/>
24.   </editor:Toolbar>
25.  
26. </engine:UXML>

Thanks in advance !

 

Well... looks like the Extensions[UXML/ucss] system not really finished at this point
I'll have to wait for more polishing before been able to use it

 

...Are there people using Extensions ?
What are your feedback ?
Will Unity pay me for using it ? since using Unity is more and more working for their Qa... freely.
Nice opportunity, Unity