# buildEither(second:) ``` static func buildEither(second component: Second) -> KeyframeTrackContentBuilder.Conditional where Value == First.Value, First : KeyframeTrackContent, Second : KeyframeTrackContent, First.Value == Second.Value ``` --- 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)