Provides details of the ExternalWorkflowExecutionCancelRequested event.

 public HistoryEvent WithExternalWorkflowExecutionCancelRequestedEventAttributes(ExternalWorkflowExecutionCancelRequestedEventAttributes externalWorkflowExecutionCancelRequestedEventAttributes)
 {
     this.externalWorkflowExecutionCancelRequestedEventAttributes = externalWorkflowExecutionCancelRequestedEventAttributes;
     return this;
 }