Could someone confirm for me that if I want a NSMapTable object with weak 
pointers to both keys and values, and that doesn't copy keys or values, the 
appropriate options are:

        [NSMapTable mapTableWithKeyOptions: (NSMapTableZeroingWeakMemory | 
NSMapTableObjectPointerPersonality) options 
                valueOptions: (NSMapTableZeroingWeakMemory | 
NSMapTableObjectPointerPersonality)]

Or is [NSMapTable mapTableWithWeakToWeakObjects] sufficient? The documentation 
doesn't say whether this is modeled after a dictionary (copies keys) or not.


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