docs: public void save(File... files) throws IOException {
          Nd4j.saveBinary(getMin(), files[0]);
          Nd4j.saveBinary(getMax(), files[1]);
          if (isFitLabel()) {
              Nd4j.saveBinary(getLabelMin(), files[2]);
              Nd4j.saveBinary(getLabelMax(), files[3]);
          }
      }