# modifier(_:) Applies a modifier to the dynamic profile. ``` func modifier(_ modifier: Modifier) -> some LanguageModelSession.DynamicProfile where Modifier : LanguageModelSession.DynamicProfileModifier ``` --- 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)