如何从ApplicationListener或拦截器获取WebSocketSession

Question

是否可以从SessionSubscribeEvent获取会话（WebSocketSession）？

public class SubscriberListener implements ApplicationListener<SessionSubscribeEvent> {

   @Override
   public void onApplicationEvent(SessionSubscribeEvent event) {
       // how to get WebSocketSession?
   }
}

我的WebSocketConfig从AbstractWebSocketMessageBrokerConfigurer扩展