code: function (fragmentUrl, callback) {
      debug('  [GET] ' + fragmentUrl);
      request(fragmentUrl, function (error, response, body) {
        if (!error && response.statusCode === 200) {
          callback(null, body);
        } else {
          callback(error, null);
        }
      });
    }
docs: Perform HTTP(S) request to retrieve remote data
  @param fragmentUrl URL to retrieve
  @param callback Method to call when data is retrieved