code: @Override
      public ByteArrayInputStream compare(Integer scalar, ImagePlotShape shape, ImageEncoding imageEncoding,
              Model model1, Model model2) throws JsonProcessingException, ApiException {
          Model[] models = { model1, model2 };
          validateRequiredModels(models);
          return compare(scalar, shape, imageEncoding, toJson(models));
      }
docs: {@inheritDoc}