Is it possible to find the ICase that has lead to another ICase creation?

Hi everybody!

I have a process which triggers another process start through a trigger step. The first process has a related ICase (ivy.case) and the 2d started process belongs to another ICase. We could consider in such a situation that the first ICase is the "ancestor" of the second one. Is there a possibility to get a reference to the "ancestor" ICase from the second one? Especially in a WorkflowEvent Listener like the one stated in this question: listen-to-process-case-start-and-task-creation-start

A very convenient way would be something like:

IWorkflowEvent createEvent = wfManager.findWorkflowEvent(event.getId());
if (createEvent.getEventKind() != WorkflowEventKind.EVENT_CREATE_CASE) {
return;
}
ICase newCase = createEvent.getCase();
newCase.getAncestorICase() // null if no ancestor, the ICase from which this newCase has been triggered

Thanks a lot in advance! Cheers Emmanuel