All Superinterfaces:

Serializable
```
public interface SettingKey
extends Serializable
```
Type for the custom keys in settings. The keys (used in custom settings) must implement this interface. It makes possible to be 'compiler safe' and define Enum for keys. This way is easier to follow the changes in the key names and avoid a typo. The implementation of this interface must properly implement equals() and hashCode() to be used as keys in a Map

Interface SettingKey