code: public <T extends Evaluation> T evaluate(String path, DataSetLoader loader) {
          return evaluate(path, DEFAULT_EVAL_SCORE_BATCH_SIZE, loader);
      }
docs: Evaluate on a directory containing a set of DataSet objects to be loaded with a {@link DataSetLoader}.
  Uses default batch size of {@link #DEFAULT_EVAL_SCORE_BATCH_SIZE}
  @param path Path/URI to the directory containing the datasets to load
  @return Evaluation