private void handleFeatureLevelNotSupported(ImageWriterOptions options) {
        // If the metadata version is older than 3.3-IV0, we can't represent any feature flags,
        // because the FeatureLevel record is not supported.
        if (!finalizedVersions.isEmpty()) {
            List<String> features = new ArrayList<>(finalizedVersions.keySet());
            features.sort(String::compareTo);
            options.handleLoss("feature flag(s): " + String.join(", ", features));
        }
    }
Represents the feature levels in the metadata image.

This class is thread-safe.
metadata/src/main/java/org/apache/kafka/image/FeaturesImage.java