### @type `string`

An enum containing string representations of each [ActivityUIDismissalPolicy](https://developer.apple.com/documentation/activitykit/activityuidismissalpolicy).

Possible values are:

* [default](https://developer.apple.com/documentation/activitykit/activityuidismissalpolicy/default)
* [immediate](https://developer.apple.com/documentation/activitykit/activityuidismissalpolicy/immediate)
* [afterDate](https://developer.apple.com/documentation/activitykit/activityuidismissalpolicy/after(_:))