code: public void revertFeatures(@NonNull INDArray features, INDArray mask, int input) {
          strategy.revert(features, mask, getFeatureStats(input));
      }
docs: Undo (revert) the normalization applied by this normalizer to a specific features array.
  If labels normalization is disabled (i.e., {@link #isFitLabel()} == false) then this is a no-op.
  Can also be used to undo normalization for network output arrays, in the case of regression.
  
  @param features features arrays to revert the normalization on
  @param input    the index of the array to revert