public Optional<String> getHomepage() {
        return Optional.ofNullable(homepage);
    }
Gets this TraceMetadata's Homepage in an Optional container.
The homepage is the homepage URL of the artifact.

@return Optional container with homepage or empty container if
homepage has not been set
smithy-codegen-core/src/main/java/software/amazon/smithy/codegen/core/trace/TraceMetadata.java