# OptionalUnwrapper A transformer that unwraps optional elements and throws when encountering missing values. ``` struct OptionalUnwrapper ``` ## Topics ### Creating a transformer [`init()`](/documentation/CreateMLComponents/OptionalUnwrapper/init()) Creates a transformer that unwraps an optional element or throws if the value is nil. ### Performing the transformation [`func applied(to: Element?, eventHandler: EventHandler?) throws -> Element`](/documentation/CreateMLComponents/OptionalUnwrapper/applied(to:eventHandler:)) Unwraps an optional element or throws if the value is `nil`. ## Relationships ### Conforms To [`Transformer`](/documentation/CreateMLComponents/Transformer) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) --- 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)