rem: var parent = this.parentRecord 
add: if (!("parentRecord" in this)) return null; var parent = this.parentRecord; 
context: function tovr_gettree (){    var parent = this.parentRecord        while (parent)    {        if ("_treeView" in parent)            return parent._treeView;        parent = parent.parentRecord    }    return null;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/7544d3415d65bb702cb3060dd8ac2a22f009997b/tree-utils.js/clean/extensions/venkman/resources/content/tree-utils.js