Returns the message api key number.

Receive a binary in the kafka wire format and deserialize it into a map.

Response content fields:

• throttle_time_ms: The duration in milliseconds for which the request was throttled due to a quota violation, or zero if the request did not violate any quota. (int32 | versions 0+)

• error_code: The top level response error code (int16 | versions 0+)

• producer_id_start: The first producer ID in this range, inclusive (int64 | versions 0+)

• producer_id_len: The number of producer IDs in this range (int32 | versions 0+)

Returns the current max supported version of this message.

Returns the current min supported version of this message.

Receives a map and serialize it to kafka wire format of the given version.

Input content fields:

• broker_id: The ID of the requesting broker (int32 | versions 0+)

• broker_epoch: The epoch of the requesting broker (int64 | versions 0+)