public ClientQuotasDelta getOrCreateClientQuotasDelta() {
        if (clientQuotasDelta == null) clientQuotasDelta = new ClientQuotasDelta(image.clientQuotas());
        return clientQuotasDelta;
    }
A change to the broker metadata image.
metadata/src/main/java/org/apache/kafka/image/MetadataDelta.java