docs: public void marshall(UpdateFunctionRequest updateFunctionRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (updateFunctionRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(updateFunctionRequest.getApiId(), APIID_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getName(), NAME_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getDescription(), DESCRIPTION_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getFunctionId(), FUNCTIONID_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getDataSourceName(), DATASOURCENAME_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getRequestMappingTemplate(), REQUESTMAPPINGTEMPLATE_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getResponseMappingTemplate(), RESPONSEMAPPINGTEMPLATE_BINDING);
              protocolMarshaller.marshall(updateFunctionRequest.getFunctionVersion(), FUNCTIONVERSION_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }