rem: gBMtxmgr.undoTransaction(); 
add: BMSVC.transactionManager.undoTransaction(); 
context:   undoBookmarkTransaction: function ()  {    gBMtxmgr.undoTransaction();    BookmarksUtils.flushDataSource();  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/2551415e78139c80971188d087fbe6028f304cb8/bookmarks.js/buggy/xpfe/components/bookmarks/resources/bookmarks.js