# nestedContainer(keyedBy:forKey:) Stores a keyed encoding container for the given key and returns it. ``` mutating func nestedContainer(keyedBy keyType: NestedKey.Type, forKey key: KeyedEncodingContainer.Key) -> KeyedEncodingContainer where NestedKey : CodingKey ``` ## Parameters `keyType` The key type to use for the container. `key` The key to encode the container for. ## Return Value A new keyed encoding container. --- 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)