Instantiate a template from code?

Following https://docs.unity3d.com/Manual/UIE-WritingUXMLTemplate.html, I now have my own control but I can't find a way on how to instantiate it from code (would like to instantiate many of them in fact).

Basically this is what I'm trying to re-use, a control whose color and text can be set:



Tried the following:

• create an Instance, name it and set display: none to hide it
• query for this TemplateContainer, works fine
• clone this element ... impossible

How is one supposed to instantiate an arbitrary amount of UXML templates from code?

 

Thanks!