return callFunction(this, "_findProxyForURL", this._sandBox, testURI, testHost); 
return this._findProxyForURL.call(this._sandBox, testURI, testHost); 
    getProxyForURI: function(testURI, testHost) {        if (!this._findProxyForURL)            return null;        // Call the original function        return callFunction(this, "_findProxyForURL", this._sandBox,                            testURI, testHost);    }
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/0aa15eabb2a9eda2968bd87b11d6e74c83183616/nsProxyAutoConfig.js/clean/netwerk/base/src/nsProxyAutoConfig.js