Ever gotten warnings such as "PerformSelector may cause a leak because its selector is unknown" when you send -performSelector:withObject: with the selector as a variable (that you know will contain a valid selector)? That's where #pragma is very useful. Do this to disable the warning for a specific chunk of code:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    [self.proxiedTarget performSelector:someSelectorVar withObject:obj];
#pragma clang diagnostic pop

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