if (_debugging) {
_debug(new FiringEvent(this, actor, FiringEvent.BEFORE_ITERATE,
iterationCount));
}
int returnValue = actor.iterate(iterationCount);
if (returnValue == STOP_ITERATING) {
_postfireReturns = false;
} else if (returnValue == NOT_READY) {
throw new IllegalActionException(this, actor, "Actor "