docs: public static void reportHostStatus(HostSpec hostSpec, HostStatus hostStatus) {
      long now = currentTimeMillis();
      synchronized (hostStatusMap) {
        HostSpecStatus hostSpecStatus = hostStatusMap.get(hostSpec);
        if (hostSpecStatus == null) {
          hostSpecStatus = new HostSpecStatus(hostSpec);
          hostStatusMap.put(hostSpec, hostSpecStatus);
        }
        hostSpecStatus.status = hostStatus;
        hostSpecStatus.lastUpdated = now;
      }
    }