@Override
  protected void removeSubscriptionInternal(String sessionId, String subsId, Message<?> message) {
    SessionSubscriptionInfo info = this.subscriptionRegistry.getSubscriptions(sessionId);
    if (info != null) {
      String destination = info.removeSubscription(subsId);
      if (destination != null) {
        this.destinationCache.updateAfterRemovedSubscription(sessionId, subsId);
      }
    }
  }
Return the name for the selector header.
@since 4.2
ambari-server/src/main/java/org/apache/ambari/server/agent/stomp/AmbariSubscriptionRegistry.java