docs: private void registerHandlers() {
      // Register TCP message handlers.
      bootstrapService.getMessagingService().registerHandler(MEMBERSHIP_SYNC, syncHandler, swimScheduler);
      bootstrapService.getMessagingService().registerHandler(MEMBERSHIP_PROBE, probeHandler, swimScheduler);
      bootstrapService.getMessagingService().registerHandler(MEMBERSHIP_PROBE_REQUEST, probeRequestHandler);
  
      // Register UDP message listeners.
      bootstrapService.getUnicastService().addListener(MEMBERSHIP_GOSSIP, gossipListener, swimScheduler);
    }