docs: protected synchronized ResourceRoot getSeamIntResourceRoot() throws DeploymentUnitProcessingException {
          try {
              if (seamIntResourceRoot == null) {
                  final ModuleLoader moduleLoader = Module.getBootModuleLoader();
                  Module extModule = moduleLoader.loadModule(EXT_CONTENT_MODULE);
                  URL url = extModule.getExportedResource(SEAM_INT_JAR);
                  if (url == null)
                      throw ServerLogger.ROOT_LOGGER.noSeamIntegrationJarPresent(extModule);
  
                  File file = new File(url.toURI());
                  VirtualFile vf = VFS.getChild(file.toURI());
                  final Closeable mountHandle = VFS.mountZip(file, vf, TempFileProviderService.provider());
                  Service<Closeable> mountHandleService = new Service<Closeable>() {
                      public void start(StartContext startContext) throws StartException {
                      }
  
                      public void stop(StopContext stopContext) {
                          VFSUtils.safeClose(mountHandle);
                      }
  
                      public Closeable getValue() throws IllegalStateException, IllegalArgumentException {
                          return mountHandle;
                      }
                  };
                  ServiceBuilder<Closeable> builder = serviceTarget.addService(ServiceName.JBOSS.append(SEAM_INT_JAR),
                          mountHandleService);
                  builder.setInitialMode(ServiceController.Mode.ACTIVE).install();
                  serviceTarget = null; // our cleanup service install work is done
  
                  MountHandle dummy = MountHandle.create(null); // actual close is done by the MSC service above
                  seamIntResourceRoot = new ResourceRoot(vf, dummy);
              }
              return seamIntResourceRoot;
          } catch (Exception e) {
              throw new DeploymentUnitProcessingException(e);
          }
      }