code: function reComputeElementsPosition()
          {
              var baseOffset = 0;
  
              for (var idx = notificationList.length -1; idx >= 0; idx--)
              {
                  notificationList[idx].height = getElementHeight(notificationList[idx].elem[0]);
                  notificationList[idx].margin = baseOffset;
  
                  notificationList[idx].elem.css('marginBottom', notificationList[idx].margin + 'px');
  
                  baseOffset += notificationList[idx].height + 24;
              }
          }
docs: Compute the notification list element new position.
  Usefull when the height change programmatically and you need other notifications to fit.