# `GSShapeKey.GSShapeKeyCompositingOperation`

*Type Property*

The key for the shape attribute value defining the compositing operation (`GSCompositingOperation`).

## Declaration

```swift
static let compositingOperation: GSShapeKey
```

```objc
extern GSShapeKey const GSShapeKeyCompositingOperation;
```

```python
GSShapeKeyCompositingOperation: GSShapeKey
```