public Optional<String> getRelativeDocumentation() {
        return Optional.ofNullable(relativeDocumentation);
    }
Get the relative URL path that defines more information about the resource
within a set of IAM-related documentation.

@return A relative URL to the documentation page.
smithy-aws-iam-traits/src/main/java/software/amazon/smithy/aws/iam/traits/IamResourceTrait.java