How can I determine if Apple methods are asynchronous?

Question

I\'m binding an NSArrayController to a managedObjectContext with mainQueueConcurrency.

All that I want is to do is modify the sort properties the arrangedObjects wit

Answer 1

I was able to catch rearrangeObjects invoking dispatch_async_f (through bindings) by breaking just before the suspect line of code and enabling symbolic breakpoints on the GCD dispatch_async functions:

And, sure enough, the dispatch_async_f symbolic breakpoint stopped on the rearrangeObjects line: