BackstackParentNode now become BaseFlowNode and adds Overlay navModel into it.

features/ftue/impl/src/main/kotlin/io/element/android/features/ftue/impl/FtueFlowNode.kt

@@ -40,7 +40,8 @@ import io.element.android.features.ftue.impl.state.DefaultFtueState
 import io.element.android.features.ftue.impl.state.FtueStep
 import io.element.android.features.ftue.impl.welcome.WelcomeNode
 import io.element.android.features.lockscreen.api.LockScreenEntryPoint
-import io.element.android.libraries.architecture.BackstackNode
+import io.element.android.libraries.architecture.BackstackView
+import io.element.android.libraries.architecture.BaseFlowNode
 import io.element.android.libraries.architecture.animation.rememberDefaultTransitionHandler
 import io.element.android.libraries.architecture.createNode
 import io.element.android.libraries.di.AppScope
@@ -62,7 +63,7 @@ class FtueFlowNode @AssistedInject constructor(
     private val analyticsEntryPoint: AnalyticsEntryPoint,
     private val analyticsService: AnalyticsService,
     private val lockScreenEntryPoint: LockScreenEntryPoint,
-) : BackstackNode<FtueFlowNode.NavTarget>(
+) : BaseFlowNode<FtueFlowNode.NavTarget>(
     backstack = BackStack(
         initialElement = NavTarget.Placeholder,
         savedStateMap = buildContext.savedStateMap,
@@ -181,11 +182,7 @@ class FtueFlowNode @AssistedInject constructor(
 
     @Composable
     override fun View(modifier: Modifier) {
-        Children(
-            navModel = backstack,
-            modifier = modifier,
-            transitionHandler = rememberDefaultTransitionHandler(),
-        )
+        BackstackView()
     }
 
     @ContributesNode(AppScope::class)