code: public void fit(@NonNull MultiDataSet dataSet) {
          List<S.Builder> featureNormBuilders = new ArrayList<>();
          List<S.Builder> labelNormBuilders = new ArrayList<>();
  
          fitPartial(dataSet, featureNormBuilders, labelNormBuilders);
  
          featureStats = buildList(featureNormBuilders);
          if (isFitLabel()) {
              labelStats = buildList(labelNormBuilders);
          }
      }
docs: Fit a MultiDataSet (only compute based on the statistics from this {@link MultiDataSet})
  
  @param dataSet the dataset to compute on