rem: canMoveDown:      function canMoveDown() { return false; }, 
add: optgroupObject.prototype.canMoveDown = function canMoveDown() { return gDialog.lastChild() > treeSelection.currentIndex; } 
context:     canMoveDown:      function canMoveDown()    {      return false;    },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/161212bb0026cff780d4cc07e50d7cf54d70e70b/EdSelectProps.js/clean/editor/ui/dialogs/content/EdSelectProps.js