docs: protected void onFoundDestination (String destName) {
          if ( ( destName != null ) && ( ! destName.isEmpty() ) ) {
              DestinationState destState =
                      this.registry.putIfAbsent(destName, new DestinationState(destName, this.brokerId));
  
              //
              // If it was already there, mark it as seen now by the broker.
              //
              if ( destState != null ) {
                  destState.putBrokerInfo(this.brokerId, true);
              }
          }
      }