code: function(_url) {
          return new Model({
            $urlFor: function() {
              return config.urlPrefix ? Utils.joinUrl(config.urlPrefix, _url) : _url;
            }
          }, '');
        }
docs: @memberof StaticApi#
  
  @description Returns a resource bound to a given url, with no parent scope.
  
  This can be used to create singleton resources:
  
  ```javascript
  module('BikeShop', []).factory('Status', function(restmod) {
  return restmod.model(null).$single('/api/status');
  };)
  ```
  
  @param {string} _url Url to bound resource to.
  @return {Model} new resource instance.