Override to copy or initialize custom fields of the specified layer.
Original signature is '- (id)initWithLayer:(id)layer'
Available in Mac OS X v10.5 and later.


- layer (Id)
- The layer from which custom fields should be copied.

A layer instance with any custom instance variables copied from 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)