code: public <T extends RegressionEvaluation> T evaluateRegressionMDS(JavaRDD<MultiDataSet> data, int minibatchSize) {
          return (T)doEvaluationMDS(data, minibatchSize, new org.deeplearning4j.eval.RegressionEvaluation())[0];
      }
docs: Evaluate the network (regression performance) in a distributed manner on the provided data
  
  @param data Data to evaluate
  @param minibatchSize Minibatch size to use when doing performing evaluation
  @return     {@link RegressionEvaluation} instance with regression performance