Director executiveDirector = container.getExecutiveDirector();
Iterator refinements = _enabledRefinements.iterator();
while (refinements.hasNext()) {
Actor refinement = (Actor) refinements.next();
postfireReturns = postfireReturns && refinement.postfire();
// take out event outputs generated in ref.postfire()
Iterator outports = refinement.outputPortList().iterator();
while (outports.hasNext()) {