rem: return this.tree.selectedItems; 
add:    return [].concat(this.tree.selectedItems); 
context:   getSelection: function ()  {    return this.tree.selectedItems;  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/3c1e4cee57d48dad81a4af4b045f5845fa04b0f0/bookmarksTree.js/clean/xpfe/components/bookmarks/resources/bookmarksTree.js