Returns an NSDate object initialized relative to another given date by a given number of seconds.
Original signature is '- (id)initWithTimeInterval:(NSTimeInterval)seconds sinceDate:(NSDate *)refDate'
Available in Mac OS X v10.0 and later.


An NSDate object initialized relative to refDate by seconds seconds.

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