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func dispatch_sync<R> (queue: dispatch_queue_t, block: Void -> R ) -> R {
var result: R!
dispatch_sync(queue) {
result = block()
}
return result
}
func result() -> String {
return
dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
return "something"
}
}
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