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