Returns the Core Animation layer associated with a layer type.
Original signature is '- (CALayer *)overlayForType:(NSString *)layerType'
Available in Mac OS X v10.5 and later.


- layerType (NSString)
- A layer type. See “Overlay Types”.

The Core Animation layer.

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)