anchor.diff:    }
     
     _addListener(node) {
  -    node.addEventListener(this.activateEvent, _activateHandler);
  +    node.addEventListener(this.activateEvent, activateHandler);
     }
     
     _removeListener(node) {
  -    node.removeEventListener(this.activateEvent, _activateHandler);
  +    node.removeEventListener(this.activateEvent, activateHandler);
     }
     
     get selection {
  
positive.code:     }
    }
    
    _applySelection(item, isSelected) {
      if (this.selectedClass != null) {
        item.classes.toggle(this.selectedClass, isSelected);
      }
  
negative.code:    *       <p>color = {{color}}</p>
     *     </form>
     * 
     */
    @published
    String itemsSelector = '';
    
    /**
     * The event that would be fired from the item element to indicate
     * it is being selected.
     */
    @published
    String activateEvent= 'click';
    
  