The id of the RequestCancelExternalWorkflowExecutionInitiated event corresponding to the
            RequestCancelExternalWorkflowExecution decision to cancel this external workflow execution. This information can be useful for
            diagnosing problems by tracing back the chain of events leading up to this event.
             
            
 Declaration Syntax
 Declaration Syntax| C# | 
public long InitiatedEventId { get; set; }