code: public void marshall(WorkflowExecutionStartedEventAttributes workflowExecutionStartedEventAttributes, ProtocolMarshaller protocolMarshaller) {
  
          if (workflowExecutionStartedEventAttributes == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getInput(), INPUT_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getExecutionStartToCloseTimeout(), EXECUTIONSTARTTOCLOSETIMEOUT_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getTaskStartToCloseTimeout(), TASKSTARTTOCLOSETIMEOUT_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getChildPolicy(), CHILDPOLICY_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getTaskList(), TASKLIST_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getTaskPriority(), TASKPRIORITY_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getWorkflowType(), WORKFLOWTYPE_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getTagList(), TAGLIST_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getContinuedExecutionRunId(), CONTINUEDEXECUTIONRUNID_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getParentWorkflowExecution(), PARENTWORKFLOWEXECUTION_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getParentInitiatedEventId(), PARENTINITIATEDEVENTID_BINDING);
              protocolMarshaller.marshall(workflowExecutionStartedEventAttributes.getLambdaRole(), LAMBDAROLE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.