Iterate over containerList with JSTL

[Benjamin . Papez]

According to the draft version of the template developer documentation I tried to use the JSTL _expression_

- ${currentSite.allContainerLists[partnerContainer]}

but I get an error:
An error occurred while evaluating custom action attribute "items" with value "${currentSite.allContainerLists[partnerContainer]}": Unable to find a value for "allContainerLists" in object of class "org.jahia.data.beans.SiteBean" using operator "." (null)

It looks like it has not been implemented according to the proposal. I would like to iterate over a container list and display the fields of the containers by simplay using the JSTL tags <c:forEach> and <c:out>. Is it already possible?

Greetings,
Benjamin Papez