[ros-users] Smach Concurrence transitions

Hello Ros community,
I have recently started using SMACH for task execution and so far I find
it great.
I am using Concurrence but I cannot get how to specify the transitions
on /succeeded/ and /aborted/ to specific states.

I have tried {'succeeded':'STATE_A'} and
transitions={'succeeded':'STATE_A'} but with no luck.

Does anyone know what's the right way of saying that on /succeeded/ go
to STATE_A and on /aborted/ go to STATE_B?

Thanks a lot
Nikos