code: public void clean() {
  		
  		this.sipApplicationSessionAttributeListeners.clear();
  		this.sipApplicationSessionBindingListeners.clear();
  		this.sipApplicationSessionActivationListeners.clear();
  		this.sipApplicationSessionListeners.clear();
  		this.sipSessionActivationListeners.clear();
  		this.sipSessionAttributeListeners.clear();
  		this.sipSessionBindingListeners.clear();
  		this.sipSessionListeners.clear();
  		this.sipServletsListeners.clear();
  		this.sipErrorListeners.clear();
  		this.servletContextListeners.clear();
  		this.sipConnectorListeners.clear();
  		this.proxyBranchListeners.clear();
  		this.listenerServlets.clear();
  		this.timerListener = null;
  		this.containerListener = null;
  	}
docs: Empty vectors to allow garbage collection