public Optional<Integer> getResultTtlInSeconds() {
        return Optional.ofNullable(resultTtlInSeconds);
    }
Gets the number of seconds during which the resulting IAM policy
is cached.

@return Returns the cache amount in seconds.
smithy-aws-apigateway-traits/src/main/java/software/amazon/smithy/aws/apigateway/traits/AuthorizerDefinition.java