Github user creker commented on the pull request:

    https://github.com/apache/thrift/pull/539#issuecomment-147547155
  
    From the code it difficult to see what's the problem. Yes, in objc 
selectors are separate from the classes - they're shared between them and 
stored as plain strings. That creates problems only when you're dealing with 
`id` objects - compiler doesn't have type information. When you call method on 
`id` compiler will search for any class that contains the selector. But if your 
variable have a specific type then compiler will know what to do. Even with 
`id` I don't remember any conflicts - compiler just silently lets me call any 
selector that it can find which may crash at runtime because that particular 
object doesn't implement it.


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