currently no one works on such a feature, although it has been requested several times.
I think that would be a valuable contribution. Please contact me through email (hbraun at redhat dot com)
and I will you to get started.
please take a look at following jira, I put a comment on it: https://jira.jboss.org/jira/browse/BPMC-37
There is a link to another discussion I started on jBPM forum, I have uploaded two screens illustrating what I've done.
Please let me know your comments.
Will contact you later today via mail