code: 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;
      }
docs: <p>
  The forecasts for your query, in order. For <code>DAILY</code> forecasts, this is a list of days. For
  <code>MONTHLY</code> forecasts, this is a list of months.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setForecastResultsByTime(java.util.Collection)} or
  {@link #withForecastResultsByTime(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param forecastResultsByTime
  The forecasts for your query, in order. For <code>DAILY</code> forecasts, this is a list of days. For
  <code>MONTHLY</code> forecasts, this is a list of months.
  @return Returns a reference to this object so that method calls can be chained together.