Okey - now I understand what you are trying to do.
The code completion of action's on the classpath is not enough, you want a more "guided" UI for your custom processes.
what you have done until now is to use what we consider very internal API and that's impressive :) , but I don't want to promise
you that this will continue to work when updates come out etc.
You should open a bug request on JBIDE jira so we don't forget this feature request and can see if we can find some way to work on this.