Transfer the record batches into a list of produce requests on a
        per-node basis.

        Arguments:
            collated: {node_id: [RecordBatch]}

        Returns:
            dict: {node_id: ProduceRequest} (version depends on api_version)

def _create_produce_requests(self, collated):
        """
        Transfer the record batches into a list of produce requests on a
        per-node basis.

        Arguments:
            collated: {node_id: [RecordBatch]}

        Returns:
            dict: {node_id: ProduceRequest} (version depends on api_version)
        """
        requests = {}
        for node_id, batches in six.iteritems(collated):
            requests[node_id] = self._produce_request(
                node_id, self.config['acks'],
                self.config['request_timeout_ms'], batches)
        return requests