code: public <T extends ROC> T evaluateROC(JavaRDD<DataSet> data) {
          return evaluateROC(data, DEFAULT_ROC_THRESHOLD_STEPS, DEFAULT_EVAL_SCORE_BATCH_SIZE);
      }
docs: Perform ROC analysis/evaluation on the given DataSet in a distributed manner, using the default number of
  threshold steps ({@link #DEFAULT_ROC_THRESHOLD_STEPS}) and the default minibatch size ({@link #DEFAULT_EVAL_SCORE_BATCH_SIZE})
  
  @param data                    Test set data (to evaluate on)
  @return ROC for the entire data set