Interface
Common
```kotlin
public interface HostDefaultKey
```
A type-safe identifier used to define a key for retrieving default values from the hosting
environment.
This key is strictly required by `compositionLocalWithHostDefaultOf` to establish a mapping
between a `CompositionLocal` and a value provided by the host (via the internal
`HostDefaultProvider`).
#### Parameters
| | |
| --- | --- |
| T | The type of the value associated with this key. |