code: function logRequestError(err) {
  
  	var {response} = err;
  	if (!response) {
  		logger.warning(`ReactServerAgent raised exception for URL ${this._urlPath}`, err);
  	} else if (response.notFound) {
  		// 404? don't care about response
  		logger.warning(`Resource not found on server: ${this._urlPath}`);
  	} else if (response.serverError) {
  		logger.warning(`Received server error for URL ${this._urlPath}`, err);
  	} else {
  		logger.warning(`Unexpected status code returned for URL ${this._urlPath}`, err);
  	}
  }
docs: private method; 'this' bound to request object