(of property: KeyPath) -> P.Summary where P : ProgressManager.Property, P.Summary == [UInt64], P.Value == UInt64 ``` ## Parameters `property` The type of the unsigned integer property to summarize. Must be a property where the value type is `UInt64` and the summary type is `[UInt64]`. ## Return Value A `[UInt64]` summary value for the specified property. ## Discussion This method aggregates the values of a custom unsigned integer property from this progress manager and all its children, returning a consolidated summary value as an array of UInt64 values. --- 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)