code: public ReliableTopicConfig setMessageListenerConfigs(List<ListenerConfig> listenerConfigs) {
          this.listenerConfigs = listenerConfigs != null ? listenerConfigs : new LinkedList<ListenerConfig>();
          return this;
      }
docs: Sets the list of message listeners (listens for when messages are added
  or removed) for this topic.
  
  @param listenerConfigs the list of message listeners for this topic
  @return this updated topic configuration