anchor.diff:  
       c.line1 = line1;
       c.line2 = line2;
  -    c.line3 = line3;
  -    c.line4 = line4;
   
       return c;
     }
  
positive.code:         var objectsInGroup = activeGroup.getObjects();
          canvas.discardActiveGroup();
          objectsInGroup.forEach(function (object) {
            canvas.remove(object);
          });
        }
        else if (activeObject) {
          canvas.remove(activeObject);
        }
      }
    }
  
  
negative.code:     return evt.preventDefault() && false;
    };
  
    function makeCircle(left, top, line1, line2) {
      var c = new fabric.Circle({
        left: left,
        top: top,
  