I know, I miss-use ui:fragment here but it seems to do what I want:

I know, I miss-use ui:fragment here but it seems to do what I want:
- when "rendered" is false, don't show content of the whole tag
- when "rendered" is true, show content of the whole tag

So far, other tags did not work and not even with ui:define and then rendered="#{featureController.isFeatureEnaled('some_feature')#}"
on ui:define.

As long as there is no other tag that has the same behavior, I stick
with ui:fragment.