// CreatePartitionsRequest creates additional partitions for topics.
CreatePartitionsRequest => key 37, max version 3, flexible v2+, admin
  // Topics contains topics to create partitions for.
  Topics: [=>]
    // Topic is a topic for which to create additional partitions for.
    Topic: string
    // Count is the final count of partitions this topic must have after this
    // request. This must be greater than the current number of partitions.
    Count: int32
    // Assignment is a two-level array, the first corresponding to new
    // partitions, the second contining broker IDs for where new partition
    // replicas should live.
    //
    // The second level, the replicas, cannot have duplicate broker IDs (i.e.
    // you cannot replicate a single partition twice on the same broker).
    // Additionally, the number of replicas must match the current number of
    // replicas per partition on the topic.
    //
    // The first level's length must be equal to the delta of Count and the
    // current number of partitions.
    Assignment: nullable[=>]
      // Replicas are replicas to assign a new partition to.
      Replicas: [int32]
  TimeoutMillis
  // ValidateOnly is makes this request a dry-run; everything is validated but
  // no partitions are actually created.
  ValidateOnly: bool

// CreatePartitionsResponse is returned from a CreatePartitionsRequest.
CreatePartitionsResponse =>
  ThrottleMillis(1)
  // Topics is a response to each topic in the creation request.
  Topics: [=>]
    // Topic is the topic that partitions were requested to be made for.
    Topic: string
    // ErrorCode is the error code returned for each topic in the request.
    //
    // NOT_CONTROLLER is returned if the request was not issued to a Kafka
    // controller.
    //
    // TOPIC_AUTHORIZATION_FAILED is returned if the client is not authorized
    // to create partitions for a topic.
    //
    // INVALID_REQUEST is returned for duplicate topics in the request.
    //
    // INVALID_TOPIC_EXCEPTION is returned if the topic is queued for deletion.
    //
    // REASSIGNMENT_IN_PROGRESS is returned if the request was issued while
    // partitions were being reassigned.
    //
    // UNKNOWN_TOPIC_OR_PARTITION is returned if the broker does not know of
    // the topic for which to create partitions.
    //
    // INVALID_PARTITIONS is returned if the request would drop the total
    // count of partitions down, or if the request would not add any more
    // partitions, or if the request uses unknown brokers, or if the request
    // assigns a different number of brokers than the increase in the
    // partition count.
    ErrorCode: int16
    // ErrorMessage is an informative message if the topic creation failed.
    ErrorMessage: nullable-string