docs: public void marshall(GetCostForecastRequest getCostForecastRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (getCostForecastRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(getCostForecastRequest.getTimePeriod(), TIMEPERIOD_BINDING);
              protocolMarshaller.marshall(getCostForecastRequest.getMetric(), METRIC_BINDING);
              protocolMarshaller.marshall(getCostForecastRequest.getGranularity(), GRANULARITY_BINDING);
              protocolMarshaller.marshall(getCostForecastRequest.getFilter(), FILTER_BINDING);
              protocolMarshaller.marshall(getCostForecastRequest.getPredictionIntervalLevel(), PREDICTIONINTERVALLEVEL_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }