# encodePredicateExpressionIfPresent(_:forKey:variable:predicateConfiguration:) ``` mutating func encodePredicateExpressionIfPresent(_ expression: T?, forKey key: KeyedEncodingContainer.Key, variable: repeat PredicateExpressions.Variable, predicateConfiguration: PredicateCodableConfiguration) throws where T : PredicateExpression, T : Encodable, T.Output == Bool ``` --- 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)