The type of the action set, such as built-in or user-defined.
- iOS 9.0+
- tvOS 9.0+
- watchOS 2.0+
An action set type can be user-defined, trigger-owned, or one of the built-in types. Note that built-in action sets cannot be removed from the home, and trigger-owned action sets cannot be executed, renamed, or associated with another trigger.