public static RetryingClientBuilder builder(RetryConfig<HttpResponse> retryConfig) {
        return new RetryingClientBuilder(retryConfig);
    }
Returns a new {@link RetryingClientBuilder} with the specified {@link RetryConfig}.
The {@link RetryConfig} object encapsulates {@link RetryRule} or {@link RetryRuleWithContent},
{@code maxContentLength}, {@code maxTotalAttempts} and {@code responseTimeoutMillisForEachAttempt}.
core/src/main/java/com/linecorp/armeria/client/retry/RetryingClient.java