code: function bundlerFactory(loader, options) {
    function bundlerDelegate(modules) {
      return bundler(loader, options || {}, modules);
    }
  
    bundlerDelegate.bundle = function(names) {
      return loader.fetch(names).then(bundlerDelegate);
    };
  
    return bundlerDelegate;
  }
docs: Convenience factory for specifying the instance of bit loader to bundle up