docs: public void marshall(MessageRequest messageRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (messageRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(messageRequest.getAddresses(), ADDRESSES_BINDING);
              protocolMarshaller.marshall(messageRequest.getContext(), CONTEXT_BINDING);
              protocolMarshaller.marshall(messageRequest.getEndpoints(), ENDPOINTS_BINDING);
              protocolMarshaller.marshall(messageRequest.getMessageConfiguration(), MESSAGECONFIGURATION_BINDING);
              protocolMarshaller.marshall(messageRequest.getTraceId(), TRACEID_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }