public BatchWriteItemSpec withUnprocessedItems(
            Map<String, List<WriteRequest>> unprocessedItems) {
        this.unprocessedItems = Collections.unmodifiableMap(
                new LinkedHashMap<String, List<WriteRequest>>(unprocessedItems));
        return this;
    }
Full parameter specification for the BatchWriteItem API.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/document/spec/BatchWriteItemSpec.java