docs: public void marshall(CaptionSelectorSettings captionSelectorSettings, ProtocolMarshaller protocolMarshaller) {
  
          if (captionSelectorSettings == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(captionSelectorSettings.getAribSourceSettings(), ARIBSOURCESETTINGS_BINDING);
              protocolMarshaller.marshall(captionSelectorSettings.getDvbSubSourceSettings(), DVBSUBSOURCESETTINGS_BINDING);
              protocolMarshaller.marshall(captionSelectorSettings.getEmbeddedSourceSettings(), EMBEDDEDSOURCESETTINGS_BINDING);
              protocolMarshaller.marshall(captionSelectorSettings.getScte20SourceSettings(), SCTE20SOURCESETTINGS_BINDING);
              protocolMarshaller.marshall(captionSelectorSettings.getScte27SourceSettings(), SCTE27SOURCESETTINGS_BINDING);
              protocolMarshaller.marshall(captionSelectorSettings.getTeletextSourceSettings(), TELETEXTSOURCESETTINGS_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }