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{ "name": "Replicas", "type":  "[]int32", "versions":  "0", "entityType": "brokerId",
  "about": "The replicas of this partition, sorted by preferred order." },
(...)
{ "name": "Assignment", "type": "[]ReplicaAssignment", "versions": "1+",
  "about": "The replicas of this partition, sorted by preferred order.", "fields": [
  { "name": "Broker", "type": "int32", "versions": "1+", "entityType": "brokerId",
    "about": "The broker ID hosting the replica." },
  { "name": "Directory", "type": "uuid", "versions": "1+", "taggedVersions": "+1", "tag": "0",
    "about": "The log directory hosting the replica" }
]}

Although not specified in the schema, the default value for Directory is Uuid.ZERO, as that's the default default value (yes, double default, not a typo) for UUID types.

RPC requests

BrokerRegistrationRequest will include the following two new fields:

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