code: public void batchSave(Object... objectsToSave) {
          batchWrite(Arrays.asList(objectsToSave), Collections.emptyList(), this.config);
      }
docs: Saves the objects given using one or more calls to the
  {@link AmazonDynamoDB#batchWriteItem(BatchWriteItemRequest)} API.
  
  @see DynamoDBMapper#batchWrite(List, List, DynamoDBMapperConfig)