Android
```kotlin public object PlaceholderDefaults ``` Contains the default values used for providing placeholders. There are two distinct but coordinated aspects to placeholders in Compose for Wear OS. Firstly [Modifier.placeholder](/jetpack-compose/androidx.wear.compose/compose-material3/composable-functions/placeholder) which is drawn instead of content that is not yet loaded. Secondly a placeholder shimmer effect [Modifier.placeholderShimmer](/jetpack-compose/androidx.wear.compose/compose-material3/composable-functions/placeholderShimmer) effect which runs in an animation loop while waiting for the data to load. Note that besides placeholders, cached content may also be shown while waiting for the data to refresh.