public List<DynamoDBMapper.FailedBatch> batchWrite(Iterable<T> objectsToWrite, Iterable<T> objectsToDelete) {
        return mapper.batchWrite(objectsToWrite, objectsToDelete);
    }
Saves and deletes the objects given using one or more calls to the
batchWriteItem API.
@param objectsToWrite The objects to write.
@param objectsToDelete The objects to delete.
@return The list of failed batches.
@see com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper#batchWrite
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/DynamoDBTableMapper.java