@Override
    public String toString() {
        return "MetadataDelta(" +
            "featuresDelta=" + featuresDelta +
            ", clusterDelta=" + clusterDelta +
            ", topicsDelta=" + topicsDelta +
            ", configsDelta=" + configsDelta +
            ", clientQuotasDelta=" + clientQuotasDelta +
            ", producerIdsDelta=" + producerIdsDelta +
            ", aclsDelta=" + aclsDelta +
            ", scramDelta=" + scramDelta +
            ", delegationTokenDelta=" + delegationTokenDelta +
            ", streamMetadataDelta=" + s3StreamsMetadataDelta +
            ", objectsMetadataDelta=" + s3ObjectsDelta +
            ", kvDelta=" + kvDelta +
            ')';
    }
Create removal deltas for anything which was in the base image, but which was not
referenced in the snapshot records we just applied.
metadata/src/main/java/org/apache/kafka/image/MetadataDelta.java