docs: public Predictor month(int nyear, Month... months)
      {
          Object[] arr = new Object[months.length + 1];
          arr[0] = nyear;
          int index = 1;
          for (Month m : months)
          {
              arr[index++] = Double.valueOf(m.getValue());
          }
          input.add(new CommandLine<>(MONTH, 5, arr));
          return this;
      }