Contents

layerUUID

A UUID of the image that the framework uses to validate its compatibility with the layer above it in the stack

Declaration

var layerUUID: UUID? { get }

Discussion

All images contain a layer UUID, except for RAW images.

The layer UUID changes when the framework first writes to an image. In a stacked disk image, the framework can only write to the topmost image. The layer UUID of cache layers never changes.