# Facade

Artifact: [androidx.constraintlayout:constraintlayout-core](https://developer.android.com/jetpack/androidx/releases/constraintlayout) [View Source](https://cs.android.com/search?q=file:androidx/constraintlayout/core/state/helpers/Facade.java+class:androidx.constraintlayout.core.state.helpers.Facade) Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

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```
public interface Facade
```

<br />

Known direct subclasses [GuidelineReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/GuidelineReference), [HelperReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/HelperReference)

|---|---|
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/GuidelineReference` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/HelperReference` |   |

Known indirect subclasses [AlignHorizontallyReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/AlignHorizontallyReference), [AlignVerticallyReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/AlignVerticallyReference), [BarrierReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/BarrierReference), [ChainReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/ChainReference), [FlowReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/FlowReference), [GridReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/GridReference), [HorizontalChainReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/HorizontalChainReference), [VerticalChainReference](https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/VerticalChainReference)

|---|---|
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/AlignHorizontallyReference` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/AlignVerticallyReference` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/BarrierReference` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/ChainReference` | `https://developer.android.com/reference/androidx/constraintlayout/core/state/HelperReference` for Chains. |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/FlowReference` | The FlowReference class can be used to store the relevant properties of a Flow Helper when parsing the Flow Helper information in a JSON representation. |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/GridReference` | A HelperReference of a Grid Helper that helps enable Grid in Compose |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/HorizontalChainReference` |   |
| `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/VerticalChainReference` |   |

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## Summary

| ### Public methods |
|---|---|
| `abstract void` | `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/Facade#apply()()` |
| `abstract https://developer.android.com/reference/androidx/constraintlayout/core/widgets/ConstraintWidget` | `https://developer.android.com/reference/androidx/constraintlayout/core/state/helpers/Facade#getConstraintWidget()()` |

## Public methods

### apply

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
abstract void apply()
```

### getConstraintWidget

Added in [1.1.2](https://developer.android.com/jetpack/androidx/releases/constraintlayout#1.1.2)

```
abstract ConstraintWidget getConstraintWidget()
```