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# layerType

The layer type of the disk image.

```
var layerType: DiskImage.LayerType? { get }
```

## Discussion

Returns [`cache`](/documentation/DiskImageKit/DiskImage/LayerType-swift.struct/cache) for cache layers and [`overlay`](/documentation/DiskImageKit/DiskImage/LayerType-swift.struct/overlay) for overlay layers
that are part of a stacked disk image.
Returns `nil` for standalone images, for the base layer of a stack and for the stacked image itself.

---

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