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How Do Classes Respond to performSelector?



This is just a question out of curiosity. In the developer docs, only - (id)performSelector: is defined.
So I was going to write my own + (id)perfromSelector, but first figured I'd check whether there was
one already by writing up a quick test in XCode - which it turns out there is (saved me the work).
I figured it must just not be in the documentation, so I was going to file a bug on the developer docs...
Yet, doing a classdump on Foundation.framework doesn't show + performSelector either (only on
NSProxy, not on NSObject). Is there some magic going on? Is +performSelector actually not defined
on NSObject and this is getting forwarded to NSProxy or something? Or is this just a case of under
documentation and class dump not telling the whole truth?


Thanks,

Francisco
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