docs: public GetCostForecastResult withForecastResultsByTime(ForecastResult... forecastResultsByTime) {
          if (this.forecastResultsByTime == null) {
              setForecastResultsByTime(new java.util.ArrayList<ForecastResult>(forecastResultsByTime.length));
          }
          for (ForecastResult ele : forecastResultsByTime) {
              this.forecastResultsByTime.add(ele);
          }
          return this;
      }