code: function(link, options, callback) {
              var data = {'link': link};
              addSizes(data, options, 'thumbnailSizes');
              addSizes(data, options, 'imageSizes');
              return processr._request('POST', '/resources', data, callback);
          }
docs: Create and process a link
  
  @param  {string}     link                            The link that should be processed
  @param  {Object}     [options]                       A set of extra options
  @param  {string[]}   [options.thumbnailSizes]        A set of thumbnail dimensions
  @param  {string[]}   [options.imageSizes]            A set of image dimensions
  @param  {Function}   callback                        Standard callback function
  @param  {Error}      callback.err                    The error object as returned by the REST API. If no error occurred, this value will be `null`
  @param  {Object}     callback.data                   The data as returned by the REST API. If the request errored, this value will be `null`