async attemptSendRequest(request, secondaryHas404, attempt) {
        const newRequest = request.clone();
        const isPrimaryRetry = secondaryHas404 ||
            !this.retryOptions.secondaryHost ||
            !(request.method === "GET" || request.method === "HEAD" || request.method === "OPTIONS") ||
            attempt % 2 === 1;
        if (!isPrimaryRetry) {
            newRequest.url = setURLHost(newRequest.url, this.retryOptions.secondaryHost);
        }
        // Set the server-side timeout query parameter "timeout=[seconds]"
        if (this.retryOptions.tryTimeoutInMs) {
            newRequest.url = setURLParameter(newRequest.url, URLConstants.Parameters.TIMEOUT, Math.floor(this.retryOptions.tryTimeoutInMs / 1000).toString());
        }
        let response;
        try {
            logger.info(`RetryPolicy: =====> Try=${attempt} ${isPrimaryRetry ? "Primary" : "Secondary"}`);
            response = await this._nextPolicy.sendRequest(newRequest);
            if (!this.shouldRetry(isPrimaryRetry, attempt, response)) {
                return response;
            }
            secondaryHas404 = secondaryHas404 || (!isPrimaryRetry && response.status === 404);
        }
        catch (err) {
            logger.error(`RetryPolicy: Caught error, message: ${err.message}, code: ${err.code}`);
            if (!this.shouldRetry(isPrimaryRetry, attempt, response, err)) {
                throw err;
            }
        }
        await this.delay(isPrimaryRetry, attempt, request.abortSignal);
        return this.attemptSendRequest(request, secondaryHas404, ++attempt);
    }
Decide and perform next retry. Won't mutate request parameter.

@param request -
@param secondaryHas404 -  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.
@param attempt -           How many retries has been attempted to performed, starting from 1, which includes
                                  the attempt will be performed by this method call.