return callFunction.call(this._sandBox, this._findProxyForURL, testURI, testHost); 
return this._sandBox.FindProxyForURL(testURI, testHost); 
    getProxyForURI: function(testURI, testHost) {        if (!this._findProxyForURL)            return null;        // Call the original function        return callFunction.call(this._sandBox, this._findProxyForURL,                                 testURI, testHost);    }
5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5872/928f23d72de8f059feb4f438f51e864448edee81/nsProxyAutoConfig.js/clean/netwerk/base/src/nsProxyAutoConfig.js