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# CGLayerRetain

Increments the retain count of a layer object.

```
extern CGLayerRefCGLayerRetain(CGLayerRef layer);
```

## Parameters

`layer`

The layer to retain.

## Return Value

The same layer you passed in as the `layer` parameter.

## Discussion

This function is equivalent to calling <doc://com.apple.documentation/documentation/CoreFoundation/CFRetain> except that it does not crash if the `layer` parameter is `null`.

---

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