rem: this.isValid = null; 
context: function BookmarkInsertTransaction (aAction){  this.wrappedJSObject = this;  this.type    = "insert";  this.action  = aAction;  this.item    = null;  this.parent  = null;  this.index   = null;  this.isValid = null;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/ac77f358a61b45de690bdb84b46470c08b2a00a8/bookmarks.js/buggy/browser/components/bookmarks/content/bookmarks.js