code: function() {
              var cookieString = "";
  
              utils.forEach(this._cookieStore, function (cookieValue, cookieKey) {
                  cookieString += cookieKey;
                  cookieString += '=';
                  cookieString += cookieValue;
                  cookieString += '; ';
              });
  
              return cookieString;
  
          }
docs: Returns all cookies formatted as a string to be put into the Cookie Header.