docs: private static void setServiceEnabled(final XMPPConnection connection,
              final boolean isEnabled) {
          ServiceDiscoveryManager manager = ServiceDiscoveryManager
                  .getInstanceFor(connection);
  
          List<String> namespaces = new ArrayList<>();
          namespaces.addAll(Arrays.asList(NAMESPACE));
          namespaces.add(DataPacketExtension.NAMESPACE);
          if (!IBB_ONLY) {
              namespaces.add(Bytestream.NAMESPACE);
          }
  
          for (String namespace : namespaces) {
              if (isEnabled) {
                  manager.addFeature(namespace);
              } else {
                  manager.removeFeature(namespace);
              }
          }
      }