async addOffsetsToTxn({ transactionalId, producerId, producerEpoch, groupId }) {
    const addOffsetsToTxn = this.lookupRequest(apiKeys.AddOffsetsToTxn, requests.AddOffsetsToTxn)
    return await this[PRIVATE.SEND_REQUEST](
      addOffsetsToTxn({ transactionalId, producerId, producerEpoch, groupId })
    )
  }
Send an `AddOffsetsToTxn` request.

Request should be made to the transaction coordinator.
@public
@param {object} request
@param {string} request.transactionalId The transactional id corresponding to the transaction.
@param {number} request.producerId Current producer id in use by the transactional id.
@param {number} request.producerEpoch Current epoch associated with the producer id.
@param {string} request.groupId The unique group identifier (for the consumer group)
@returns {Promise}