Android
```kotlin
public abstract class Node : DelegatableSubspaceNode
```
The longer-lived object that is created for each [SubspaceModifierNodeElement](/jetpack-compose/androidx.xr.compose/compose/classes/SubspaceModifierNodeElement) applied to a
[SubspaceLayout](/jetpack-compose/androidx.xr.compose/compose/composable-functions/SubspaceLayout)
## Functions
onAttach
```kotlin
public open fun onAttach()
```
Called when the node is attached to a [SubspaceLayout](/jetpack-compose/androidx.xr.compose/compose/composable-functions/SubspaceLayout) which is part of the UI tree.
onDetach
```kotlin
public open fun onDetach()
```
Called when the node is not attached to a [SubspaceLayout](/jetpack-compose/androidx.xr.compose/compose/composable-functions/SubspaceLayout) anymore. Note that the node
can be reattached again.