Question About Converting to ARC

[garyfoster]

I'm not sure how to convert the following line to ARC compatible code, and googled a bit and could not come up with the answer. I changed it to nilSymbol and seems to work but wondering if that is correct.

Original code:

[[self allTargets] makeObjectsPerformSelector:@selector(retain)];

Updated code:
[[self allTargets] makeObjectsPerformSelector:@selector(nilSymbol)];