add: if (this.mBatchCount) { return; } 
context: function observer_onModifyItem(newItem, oldItem){    this.onDeleteItem(oldItem, "no-rebuild");    this.onAddItem(newItem);};
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c833b6618a501f5edb59311b9dc9a982ec63cf59/agenda-tree.js/buggy/calendar/lightning/content/agenda-tree.js