# PaneExpansionStateKeyProvider

Artifact: [androidx.compose.material3.adaptive:adaptive-layout](https://developer.android.com/jetpack/androidx/releases/compose-material3-adaptive) [View Source](https://cs.android.com/search?q=file:androidx/compose/material3/adaptive/layout/PaneExpansionState.kt+class:androidx.compose.material3.adaptive.layout.PaneExpansionStateKeyProvider) Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/compose-material3-adaptive#1.1.0) Common/All
- Cmn

  ```
  @ExperimentalMaterial3AdaptiveApi
  sealed interface PaneExpansionStateKeyProvider
  ```
Known direct subclasses [ThreePaneScaffoldValue](https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/ThreePaneScaffoldValue)

|---|---|
| `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/ThreePaneScaffoldValue` | The adapted value of `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/package-summary#ThreePaneScaffold(androidx.compose.ui.Modifier,androidx.compose.material3.adaptive.layout.PaneScaffoldDirective,androidx.compose.material3.adaptive.layout.ThreePaneScaffoldValue,androidx.compose.material3.adaptive.layout.ThreePaneScaffoldHorizontalOrder,kotlin.Function1,kotlin.Function1,androidx.compose.material3.adaptive.layout.PaneExpansionState,kotlin.Function2,kotlin.Function1)`. |

*** ** * ** ***

Interface that provides `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionStateKey` to remember and retrieve `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionState` with `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/rememberPaneExpansionState.composable#rememberPaneExpansionState(androidx.compose.material3.adaptive.layout.PaneExpansionStateKeyProvider,kotlin.collections.List,kotlin.Int,androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.foundation.gestures.FlingBehavior,kotlin.Function1)`.

## Summary

| ### Public properties |
|---|---|---|
| `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionStateKey` | `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionStateKeyProvider#paneExpansionStateKey()` The key that represents the unique state of the provider to index `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionState`. | Cmn |

## Public properties

### paneExpansionStateKey

Cmn Added in [1.1.0](https://developer.android.com/jetpack/androidx/releases/compose-material3-adaptive#1.1.0)

```
val paneExpansionStateKey: PaneExpansionStateKey
```

The key that represents the unique state of the provider to index `https://developer.android.com/reference/kotlin/androidx/compose/material3/adaptive/layout/PaneExpansionState`.