docs: public void pollOnce () throws IOException {
          MBeanAccessConnection connection = this.mBeanAccessConnectionFactory.createConnection();
  
          //
          // Set of Queues known at start in order to detect Queues lost.  This set may contain queues already known to
          //  have been lost.
          //
          Set<String> remainingQueues = new HashSet<>(this.registry.keys());
  
          try {
              ObjectName destinationPattern =
                      this.jmxActiveMQUtil.getDestinationObjectName(this.brokerName, "*", this.destinationType);
  
              Set<ObjectName> found = connection.queryNames(destinationPattern, null);
  
              //
              // Iterate over the mbean names matching the pattern, extract the destination name, and process.
              //
              for ( ObjectName oneDestOName : found ) {
                  String destName = this.jmxActiveMQUtil.extractDestinationName(oneDestOName);
  
                  this.onFoundDestination(destName);
                  remainingQueues.remove(destName);
              }
  
              //
              // Mark any queues remaining in the expected queue set as not known by the broker.
              //
              for ( String missingQueue : remainingQueues ) {
                  DestinationState destState = this.registry.get(missingQueue);
                  if ( destState != null ) {
                      // Remove now if not known by any broker.
                      if ( ! destState.existsAnyBroker() ) {
                          this.registry.remove(missingQueue);
                      } else {
                          destState.putBrokerInfo(this.brokerId, false);
                      }
                  }
              }
          } catch (MalformedObjectNameException monExc) {
              throw new RuntimeException("unexpected object name failure for destinationType=" + this.destinationType,
                      monExc);
          } finally {
              this.safeClose(connection);
          }
      }