docs: public void marshall(PostContentRequest postContentRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (postContentRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(postContentRequest.getBotName(), BOTNAME_BINDING);
              protocolMarshaller.marshall(postContentRequest.getBotAlias(), BOTALIAS_BINDING);
              protocolMarshaller.marshall(postContentRequest.getUserId(), USERID_BINDING);
              protocolMarshaller.marshall(postContentRequest.getSessionAttributes(), SESSIONATTRIBUTES_BINDING);
              protocolMarshaller.marshall(postContentRequest.getRequestAttributes(), REQUESTATTRIBUTES_BINDING);
              protocolMarshaller.marshall(postContentRequest.getContentType(), CONTENTTYPE_BINDING);
              protocolMarshaller.marshall(postContentRequest.getAccept(), ACCEPT_BINDING);
              protocolMarshaller.marshall(postContentRequest.getInputStream(), INPUTSTREAM_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }