@Override
    public String toString() {
        return String.format(
            "FeatureMetadata{finalizedFeatures:%s, finalizedFeaturesEpoch:%s, supportedFeatures:%s}",
            mapToString(finalizedFeatures),
            finalizedFeaturesEpoch.map(Object::toString).orElse("<none>"),
            mapToString(supportedFeatures));
    }
Returns a map of supported feature versions. Each entry in the map contains a key being a
feature name and the value being a range of versions supported by a particular broker in the
cluster.
clients/src/main/java/org/apache/kafka/clients/admin/FeatureMetadata.java