# subscribe(to:_:) Shadows the `EntityAction.subscribe(to:_:)` overload that takes a `-> Void` closure. ``` @MainActor @preconcurrency static func subscribe(to eventType: ActionEventType, _ handler: @escaping @MainActor (ActionEvent) -> Void) ``` ## Discussion When the handler doesn’t return a value, the action status is preserved: the value already in `actionStatusPointer` at the time the handler is called is read and written back, leaving the behavior tree’s status unchanged. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)