# init(_:_:) Creates a `Switch` statement that branches based on union value parameter cases. ``` init(_ keyPath: KeyPath>, @ParameterSummaryCaseBuilder _ builder: () -> CaseCondition) where Value : Sendable, Value.ValueType : AppUnionValue ``` ## Parameters `keyPath` Key path to the union value parameter `builder` A result builder that constructs the case conditions --- 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)