code: function (element, quantity, callback) {
                  if (this.$.basket) {
  
                      this.fixBasketCurrency();
  
                      var basketItem = this.$.basket.addElement(element, quantity);
                      element = basketItem.$.element;
  
                      var originId = this.$.originId;
                      if (originId) {
                          basketItem.set('origin', new Entity({
                              id: originId
                          }));
                      }
  
                      this.extendElementWithLinks(element);
                  }
  
                  callback && callback();
              }
docs: Adds an element to the basket without saving it
  @param element
  @param quantity
  @param callback