rem: return Components.classes["@mozilla.org/supports-wstring;1"] .createInstance(Components.interfaces.nsISupportsWString); 
add: return Components.classes["@mozilla.org/supports-string;1"] .createInstance(Components.interfaces.nsISupportsString); 
context:   createSupportsWString: function ()    {        return Components.classes["@mozilla.org/supports-wstring;1"]                       .createInstance(Components.interfaces.nsISupportsWString);    },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/f7ad4265ef6a40ea01c54009718ef28974e67fe9/nsJSSupportsUtils.js/buggy/xpfe/global/resources/content/nsJSSupportsUtils.js