EventKit equivalent for declining an event

Hi there,

In the UI for the native calendar app, when I tap on a meeting in my calendar that's owned by another calendar (i.e. I can't edit it) I see three buttons at the bottom of the popup: Accept, Maybe, and Decline.

Is there a property on EKEvent that I can set to have the same effect as a user tapping one of these buttons? It seems that EKEvent.status is the most likely candidate, but I see that it's readonly.
EventKit equivalent for declining an event
 
 
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