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{
  "apiKey": 28,
  "type": "response",
  "name": "TxnOffsetCommitResponse",
  // ...
  // Version 6 adds support for topic IDs and removes support for
  // topic names. It can also return GROUP_ID_NOT_FOUND and
  // STALE_MEMBER_EPOCH (KIP-1319).
  "validVersions": "0-6",                                    // CHANGED
  "flexibleVersions": "3+",
  // Supported errors:
  // ...
  // - GROUP_ID_NOT_FOUND (version 6+)                       // NEW
  // - STALE_MEMBER_EPOCH (version 6+)                       // NEW
  // - UNKNOWN_TOPIC_ID (version 6+)                         // NEW
  "fields": [
    { "name": "ThrottleTimeMs", "type": "int32", "versions": "0+" },
    { "name": "Topics",
      "type": "[]TxnOffsetCommitResponseTopic", "versions": "0+",
      "about": "The responses for each topic.", "fields": [
        { "name": "Name", "type": "string",
          "versions": "0-5",                                  // CHANGED
          "entityType": "topicName", "ignorable": true,
          "about": "The topic name." },
        { "name": "TopicId", "type": "uuid",                  // NEW
          "versions": "6+", "ignorable": true,
          "about": "The topic ID." },
        { "name": "Partitions",
          "type": "[]TxnOffsetCommitResponsePartition",
          "versions": "0+", "fields": [
            { "name": "PartitionIndex", "type": "int32", "versions": "0+" },
            { "name": "ErrorCode", "type": "int16", "versions": "0+" }
          ]
        }
      ]
    }
  ]
}