@Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;

      ClusterConfig that = (ClusterConfig) o;

      if (clusterId != null ? !clusterId.equals(that.clusterId) : that.clusterId != null) return false;
      if (type != null ? !type.equals(that.type) : that.type != null) return false;
      if (tag != null ? !tag.equals(that.tag) : that.tag != null) return false;
      return version != null ? version.equals(that.version) : that.version == null;
    }
Contains info about configs update. This update will be sent to all subscribed recipients.
ambari-server/src/main/java/org/apache/ambari/server/events/ConfigsUpdateEvent.java