docs: public void marshall(PlayReadyDrm playReadyDrm, ProtocolMarshaller protocolMarshaller) {
  
          if (playReadyDrm == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(playReadyDrm.getFormat(), FORMAT_BINDING);
              protocolMarshaller.marshall(playReadyDrm.getKey(), KEY_BINDING);
              protocolMarshaller.marshall(playReadyDrm.getKeyMd5(), KEYMD5_BINDING);
              protocolMarshaller.marshall(playReadyDrm.getKeyId(), KEYID_BINDING);
              protocolMarshaller.marshall(playReadyDrm.getInitializationVector(), INITIALIZATIONVECTOR_BINDING);
              protocolMarshaller.marshall(playReadyDrm.getLicenseAcquisitionUrl(), LICENSEACQUISITIONURL_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }