docs: protected Parameter getParameterByName(String name) throws IllegalArgumentException
      {
          Parameter param;
          if (baseClassifier != null)
              param = ((Parameterized) baseClassifier).getParameter(name);
          else
              param = ((Parameterized) baseRegressor).getParameter(name);
          if (param == null)
              throw new IllegalArgumentException("Parameter " + name + " does not exist");
          return param;
      }