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CreateTopicRequest => [TopicName Partitions ReplicationFactor ReplicaAssignment [ConfigEntry]]
TopicName => string
Partitions => int32
Replicas => int32
ReplicaAssignment => [PartitionId [ReplicaId]]
ConfigEntry => ConfigKey ConfigValue
 ConfigKey => string
 ConfigValue => string
CreateTopicRequest is a batch asynchronous request to initiate topic creation with either predefined or automatic replica assignment and optionally topic configuration.
Request semantics:
  1. Only one from (Partitions + ReplicationFactor), ReplicaAssignment can be defined in one instruction. (Note: there is a special use case - automatic topic creation for TopicMetadataRequest, to trigger it user should set client_id=consumer and define only topic name). If  If both parameters are specified - ReplicaAssignment takes precedence.
  2. In case ReplicaAssignment is defined number of partitions and replicas will be calculated from the supplied ReplicaAssignment. In case of defined (Partitions + ReplicationFactor) replica assignment will be automatically generated by the server.
  3. Multiple instructions for the same topic in one request will be silently ignored, only the last from the list will be executed.

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