code: protected void animateCancel(final I_CmsDraggable draggable, final I_CmsDNDController controller) {
  
          controller.onAnimationStart(draggable, null, this);
          stopDragging();
          Command callback = new Command() {
  
              /**
               * @see com.google.gwt.user.client.Command#execute()
               */
              public void execute() {
  
                  controller.onDragCancel(draggable, null, CmsDNDHandler.this);
                  draggable.onDragCancel();
                  clear();
              }
          };
          showEndAnimation(callback, m_startTop, m_startLeft, false);
      }
docs: Clears the drag process with a move animation of the drag element to it's original position.<p>
  
  @param draggable the draggable
  @param controller the drag and drop controller