Key
public void KeyWithDefault(@Nonnull() QualifiedKey namespace, @Nonnull() String key, @Nonnull() IKeyDeserializer<T> serializer, @Nonnull() T defaultValue)
public void KeyWithDefault(@Nonnull() QualifiedKey qualifiedKey, @Nonnull() IKeyDeserializer<T> serializer, @Nonnull() T defaultValue)