generating module-aware javadoc with ant

I don't see any module attributes or nested elements documented for the 
<javadoc> task here: https://ant.apache.org/manual/Tasks/javadoc.html 
Googling around doesn't tease out any more information on how to 
generate module-aware javadoc with ant. I can generate module-aware 
javadoc by using the <exec> task.

I have a couple questions:

1) Am I just missing something basic?

2) Are module attributes and nested elements on the roadmap for a future 
ant version?

Thanks,

-Rick