@Override
        public int hashCode() {
            return Objects.hash(topic, numPartitions, replicationFactor,
                replicasAssignments, configs);
        }
Return topic configs in the request, not including broker defaults. Broker configs are passed via
the {@code configure()} method of the policy implementation.
clients/src/main/java/org/apache/kafka/server/policy/CreateTopicPolicy.java