code: private void signalDisconnected() {
          if (alternate != null) {
              LOGGER.info("Disconnected from Node {} ({})",
                  system(hostname.nameAndAddress()), system(alternate.nameAndAddress()));
          } else {
              LOGGER.info("Disconnected from Node {}", system(hostname.nameAndAddress()));
          }
          if (eventBus != null && eventBus.hasSubscribers()) {
              eventBus.publish(new NodeDisconnectedEvent(hostname));
          }
      }
docs: Log that this node is now disconnected and also inform all susbcribers on the event bus.