XSClassCallbackCopy type definition
Class copy callback
typedef XSMutableObjectRef ( *XSClassCallbackCopy )(
XSObjectRef source,
XSMutableObjectRef destination );
The 'destination' parameter is an allocated object, without a constructor call. The return value is usually 'destination', but can be another object. If NULL is returned, 'destination' will be deallocated by the caller automatically.
The copied object