     var location: String?
     var startDate: Date = Date()
     var endDate: Date = Date()
+
+    private(set) var addedRelativeAlarmTime: TimeInterval?
+    func addAlarm(relativeOffsetFromStartDate relativeOffset: TimeInterval) {
+        addedRelativeAlarmTime = relativeOffset
+    }
     
 }
 


        XCTAssertTrue(eventAssertion.isSatisfied)
    }
    
}

        calendarEvent.startDate = event.StartDateTimeUtc
        calendarEvent.endDate = event.EndDateTimeUtc

        let thirtyMinutesPrior: TimeInterval = -1800
        calendarEvent.addAlarm(relativeOffsetFromStartDate: thirtyMinutesPrior)

        calendar.save(event: calendarEvent)
    }

