@Override
    public BatchGetItemOutcome batchGetItemUnprocessed(
            ReturnConsumedCapacity returnConsumedCapacity,
            Map<String, KeysAndAttributes> unprocessedKeys) {
        return doBatchGetItem(new BatchGetItemSpec()
                .withReturnConsumedCapacity(returnConsumedCapacity)
                .withUnprocessedKeys(unprocessedKeys));
    }
The implementation for <code>BatchGetItemApi</code>.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/document/internal/BatchGetItemImpl.java