protected virtual void ChildWorkflowExecutionCompleted(
     ChildWorkflowExecutionCompletedEventAttributes attributes, DecisionTask decisionTask)
 {
 }
 internal ChildWorkflowCompletedEvent(HistoryEvent completedEvent, IEnumerable <HistoryEvent> allEvents)
     : base(completedEvent)
 {
     _attr = completedEvent.ChildWorkflowExecutionCompletedEventAttributes;
     PopulateProperties(_attr.WorkflowExecution.RunId, _attr.InitiatedEventId, allEvents);
 }