=item submit BATCH
Send a batch of requests to the gateway. BATCH must be a
-L<Business::BatchPayment::Batch>.
+L<Business::BatchPayment::Batch>. No defined return value,
+but processors may optionally set the 'processor_id' field
+on the input batch, which should then be stored and passed
+to receive.
=item receive
Download/otherwise acquire the available confirmed transactions from the
gateway, parse them, and return a list of L<Business::BatchPayment::Batch>
objects. The items in these batches will have, at minimum, the 'approved'
-field and either the 'tid' or 'amount' field set.
+field and either the 'tid' or 'amount' field set. Accepts an optional
+list of processor_id strings, if required by your processor.
=item format_request BATCH