public Optional<Integer> getTimeoutInMillis() {
        return Optional.ofNullable(timeoutInMillis);
    }
Get the timeout in milliseconds.

<p>Integration timeouts between 50 ms and 29,000 ms. The default
setting used by API Gateway is 29,000 (or, 29 seconds).

@return Returns the optionally set timeout setting.
smithy-aws-apigateway-traits/src/main/java/software/amazon/smithy/aws/apigateway/traits/IntegrationTrait.java