contiago-toolbar/app/containers/NotFoundPage/Loadable.js

One of the options for outputting content from contiago xml-server

/**
 * Asynchronously loads the component for NotFoundPage
 */
import Loadable from 'react-loadable';

import LoadingIndicator from 'components/LoadingIndicator';

export default Loadable({
  loader: () => import('./index'),
  loading: LoadingIndicator,
});