<div class='sourceset sourceset-common'>Common</div>

```kotlin
@ExperimentalMaterial3AdaptiveComponentOverrideApi
class ThreePaneScaffoldOverrideScope
internal constructor(
    val modifier: Modifier,
    val scaffoldDirective: PaneScaffoldDirective,
    val scaffoldState: ThreePaneScaffoldState,
    val paneOrder: ThreePaneScaffoldHorizontalOrder,
    val primaryPane: @Composable () -> Unit,
    val secondaryPane: @Composable () -> Unit,
    val tertiaryPane: (@Composable () -> Unit)?,
    val paneExpansionState: PaneExpansionState,
    val paneExpansionDragHandle: (@Composable (PaneExpansionState) -> Unit)?,
    internal val motionDataProvider: ThreePaneScaffoldMotionDataProvider,
)
```

Parameters available to `ThreePaneScaffold`.