old_contents: import Loader from './Loader';
  import Resource from './Resource';
  import * as async from './async';
  import * as b64 from './b64';
  
  Loader.Resource = Resource;
  Loader.async = async;
  Loader.base64 = b64;
  
  module.exports = Loader; // eslint-disable-line no-undef
  
new_contents: import Loader from './Loader';
  import Resource from './Resource';
  import * as async from './async';
  import * as b64 from './b64';
  
  Loader.Resource = Resource;
  Loader.async = async;
  Loader.base64 = b64;
  
  // export manually, and also as default
  module.exports = Loader; // eslint-disable-line no-undef
  export default Loader;
  
subject: support default export