docs: public void marshall(WriteCampaignRequest writeCampaignRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (writeCampaignRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(writeCampaignRequest.getAdditionalTreatments(), ADDITIONALTREATMENTS_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getHoldoutPercent(), HOLDOUTPERCENT_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getHook(), HOOK_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getIsPaused(), ISPAUSED_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getLimits(), LIMITS_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getMessageConfiguration(), MESSAGECONFIGURATION_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getName(), NAME_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getSchedule(), SCHEDULE_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getSegmentId(), SEGMENTID_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getSegmentVersion(), SEGMENTVERSION_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getTags(), TAGS_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getTreatmentDescription(), TREATMENTDESCRIPTION_BINDING);
              protocolMarshaller.marshall(writeCampaignRequest.getTreatmentName(), TREATMENTNAME_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }