void dispatchModifiedEvent(PrivacyList privacyList) {
        // Trigger event that a privacy list has been modified
        for (PrivacyListEventListener listener : listeners) {
            try {
                listener.privacyListModified(privacyList); 
            } catch (Exception e) {
                logger.warn("An exception occurred while dispatching a 'privacyListModified' event!", e);   
            }
        }
    }
Returns the key to use to locate default privacy lists in the cache.
xmppserver/src/main/java/org/jivesoftware/openfire/privacy/PrivacyListManager.java