code: public boolean existsAnyBroker () {
          boolean result = false;
  
          synchronized ( this.brokerDetails ) {
              Iterator<PerBrokerInfo> iter = this.brokerDetails.values().iterator();
  
              while ( ( ! result ) && ( iter.hasNext() ) ) {
                  result = iter.next().exists;
              }
          }
  
          return result;
      }
docs: Determine if this destination currently is known to exist on any broker registered for the destination.
  
  @return true => the destination is known to exist on at least one broker; false => the destination is not known
  to exist on any broker.