code: public void revertLabels(@NonNull INDArray[] labels, INDArray[] labelsMask) {
          for (int i = 0; i < labels.length; i++) {
              INDArray mask = (labelsMask == null ? null : labelsMask[i]);
              revertLabels(labels[i], mask, i);
          }
      }
docs: Undo (revert) the normalization applied by this normalizer to the labels arrays.
  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 labels Labels arrays to revert the normalization on