// LeaderAndISRRequestTopicPartition is a common struct that is used across
// different versions of LeaderAndISRRequest.
LeaderAndISRRequestTopicPartition => not top level, no encoding, flexible v4+
  Topic: string // v0-v1
  Partition: int32
  ControllerEpoch: int32
  Leader: int32
  LeaderEpoch: int32
  ISR: [int32]
  ZKVersion: int32
  Replicas: [int32]
  AddingReplicas: [int32] // v3+
  RemovingReplicas: [int32] // v3+
  IsNew: bool // v1+
  LeaderRecoveryState: int8 // v6+

// LeaderAndISRResponseTopicPartition is a common struct that is used across
// different versions of LeaderAndISRResponse.
LeaderAndISRResponseTopicPartition => not top level, no encoding, flexible v4+
  Topic: string // v0-v4
  Partition: int32
  ErrorCode: int16

// LeaderAndISRRequest is an advanced request that controller brokers use
// to broadcast state to other brokers. Manually using this request is a
// great way to break your cluster.
//
// As this is an advanced request and there is little reason to issue it as a
// client, this request is undocumented.
//
// Kafka 1.0 introduced version 1. Kafka 2.2 introduced version 2, proposed
// in KIP-380, which changed the layout of the struct to be more memory
// efficient. Kafka 2.4.0 introduced version 3 with KIP-455.
// Kafka 3.4 introduced version 7 with KIP-866.
LeaderAndISRRequest => key 4, max version 7, flexible v4+
  ControllerID: int32
  // If KRaft controller id is used during migration. See KIP-866.
  IsKRaftController: bool // v7+
  ControllerEpoch: int32
  BrokerEpoch: int64(-1) // v2+
  Type: int8 // v5+
  PartitionStates: [LeaderAndISRRequestTopicPartition] // v0-v1
  TopicStates: [=>] // v2+
    Topic: string
    TopicID: uuid // v5+
    PartitionStates: [LeaderAndISRRequestTopicPartition]
  LiveLeaders: [=>]
    BrokerID: int32
    Host: string
    Port: int32

// LeaderAndISRResponse is returned from a LeaderAndISRRequest.
LeaderAndISRResponse =>
  ErrorCode: int16
  Partitions: [LeaderAndISRResponseTopicPartition] // v0-v4
  Topics: [=>] // v5+
    TopicID: uuid
    Partitions: [LeaderAndISRResponseTopicPartition]