docs: public <T extends RegressionEvaluation> T evaluateRegression(JavaRDD<DataSet> data, int minibatchSize) {
          long nOut = ((FeedForwardLayer) network.getOutputLayer().conf().getLayer()).getNOut();
          return (T)doEvaluation(data, new org.deeplearning4j.eval.RegressionEvaluation(nOut), minibatchSize);
      }