# ExperimentalFeatures.RegisterSourceOptIn

Artifact: [androidx.privacysandbox.ads:ads-adservices](https://developer.android.com/jetpack/androidx/releases/privacysandbox-ads) [View Source](https://cs.android.com/search?q=file:androidx/privacysandbox/ads/adservices/common/ExperimentalFeatures.kt+class:androidx.privacysandbox.ads.adservices.common.ExperimentalFeatures.RegisterSourceOptIn) Added in [1.1.0-beta12](https://developer.android.com/jetpack/androidx/releases/privacysandbox-ads#1.1.0-beta12)

*** ** * ** ***


```
@RequiresOptIn(message = "This API is experimental.", level = RequiresOptIn.Level.WARNING)
public annotation ExperimentalFeatures.RegisterSourceOptIn
```

<br />

*** ** * ** ***

Clients should use it when they want to use MeasurementManager#registerSource API.