anchor.diff:  
         }
   
  +      triggerAutoUpdate();
       }
   
       mouseup( MouseEvent event ) {
  
positive.code:        noPan,
         noRoll;
    bool staticMoving;
    num dynamicDampingFactor;
    num minDistance, maxDistance;
    List keys;
  
negative.code: 
        }
  
        triggerAutoUpdate();
      }
  
      touchend( TouchEvent event ) {
  