shouldRetry(isPrimaryRetry, attempt, response, err) {
        if (attempt >= this.retryOptions.maxTries) {
            logger.info(`RetryPolicy: Attempt(s) ${attempt} >= maxTries ${this.retryOptions
                .maxTries}, no further try.`);
            return false;
        }
        // Handle network failures, you may need to customize the list when you implement
        // your own http client
        const retriableErrors = [
            "ETIMEDOUT",
            "ESOCKETTIMEDOUT",
            "ECONNREFUSED",
            "ECONNRESET",
            "ENOENT",
            "ENOTFOUND",
            "TIMEOUT",
            "EPIPE",
            "REQUEST_SEND_ERROR", // For default xhr based http client provided in ms-rest-js
        ];
        if (err) {
            for (const retriableError of retriableErrors) {
                if (err.name.toUpperCase().includes(retriableError) ||
                    err.message.toUpperCase().includes(retriableError) ||
                    (err.code && err.code.toString().toUpperCase() === retriableError)) {
                    logger.info(`RetryPolicy: Network error ${retriableError} found, will retry.`);
                    return true;
                }
            }
        }
        // If attempt was against the secondary & it returned a StatusNotFound (404), then
        // the resource was not found. This may be due to replication delay. So, in this
        // case, we'll never try the secondary again for this operation.
        if (response || err) {
            const statusCode = response ? response.status : err ? err.statusCode : 0;
            if (!isPrimaryRetry && statusCode === 404) {
                logger.info(`RetryPolicy: Secondary access with 404, will retry.`);
                return true;
            }
            // Server internal error or server timeout
            if (statusCode === 503 || statusCode === 500) {
                logger.info(`RetryPolicy: Will retry for status code ${statusCode}.`);
                return true;
            }
        }
        // [Copy source error code] Feature is pending on service side, skip retry on copy source error for now.
        // if (response) {
        //   // Retry select Copy Source Error Codes.
        //   if (response?.status >= 400) {
        //     const copySourceError = response.headers.get(HeaderConstants.X_MS_CopySourceErrorCode);
        //     if (copySourceError !== undefined) {
        //       switch (copySourceError) {
        //         case "InternalError":
        //         case "OperationTimedOut":
        //         case "ServerBusy":
        //           return true;
        //       }
        //     }
        //   }
        // }
        if ((err === null || err === void 0 ? void 0 : err.code) === "PARSE_ERROR" && (err === null || err === void 0 ? void 0 : err.message.startsWith(`Error "Error: Unclosed root tag`))) {
            logger.info("RetryPolicy: Incomplete XML response likely due to service timeout, will retry.");
            return true;
        }
        return false;
    }
Decide whether to retry according to last HTTP response and retry counters.

@param isPrimaryRetry -
@param attempt -
@param response -
@param err -