# androidx.a2ui.engine.model

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## Interfaces

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| `https://developer.android.com/reference/kotlin/androidx/a2ui/engine/model/A2uiCoreValueResolver` | A callback interface provided by the framework layer during evaluation. |

## Classes

|---|---|
| `https://developer.android.com/reference/kotlin/androidx/a2ui/engine/model/A2uiCoreSurfaceGroupModel` | The central manager for all active surfaces on the client. |
| `https://developer.android.com/reference/kotlin/androidx/a2ui/engine/model/A2uiCoreSurfaceModel` | The root domain model for a single active surface. |