Returns a Boolean value that indicates whether every object in the receiving set is also present in another given set.
Original signature is '- (BOOL)isSubsetOfSet:(NSSet *)otherSet'
Available in Mac OS X v10.0 and later.


- otherSet (NSSet)
- The set with which to compare the receiving set.

YES if every object in the receiving set is also present in otherSet, otherwise NO.

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