code: public void marshall(StartChildWorkflowExecutionInitiatedEventAttributes startChildWorkflowExecutionInitiatedEventAttributes,
              ProtocolMarshaller protocolMarshaller) {
  
          if (startChildWorkflowExecutionInitiatedEventAttributes == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getWorkflowId(), WORKFLOWID_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getWorkflowType(), WORKFLOWTYPE_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getControl(), CONTROL_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getInput(), INPUT_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getExecutionStartToCloseTimeout(),
                      EXECUTIONSTARTTOCLOSETIMEOUT_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getTaskList(), TASKLIST_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getTaskPriority(), TASKPRIORITY_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getDecisionTaskCompletedEventId(),
                      DECISIONTASKCOMPLETEDEVENTID_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getChildPolicy(), CHILDPOLICY_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getTaskStartToCloseTimeout(), TASKSTARTTOCLOSETIMEOUT_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getTagList(), TAGLIST_BINDING);
              protocolMarshaller.marshall(startChildWorkflowExecutionInitiatedEventAttributes.getLambdaRole(), LAMBDAROLE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.