---
title: "encode(_:forKey:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/keyedencodingcontainer/encode(_:forkey:)-11ktw"
---

# encode(_:forKey:)

## Declaration

```swift
mutating func encode<T, C>(_ wrapper: CodableConfiguration<T?, C>, forKey key: KeyedEncodingContainer<K>.Key) throws where T : DecodableWithConfiguration, T : EncodableWithConfiguration, C : DecodingConfigurationProviding, C : EncodingConfigurationProviding, T.DecodingConfiguration == C.DecodingConfiguration, T.EncodingConfiguration == C.EncodingConfiguration
```