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    Does the API allow you to instantiate more than one instance of apiObj at a time, or does all of your code have to share the one instance? Commented Apr 26, 2019 at 22:57
  • "Imagine if someone else calls doWork for that same object right after you do. They "steal" the delegate, and they will get both workDone callbacks" - if 2 request be started in parallel by same wrapper, and call the callback twice as they complete, is there a way to recognize from inside the callback to which request it relates? Commented Apr 27, 2019 at 5:11
  • what language is this? many have existing constructs like promises which do this kind of thing Commented Apr 27, 2019 at 6:26
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    helpful? learnappmaking.com/promises-swift-how-to Commented Apr 27, 2019 at 6:28
  • @JohnWu the API creates the objects internally and gives them to you. There's no way to request a distinct object to avoid the delegate issue Commented Apr 28, 2019 at 20:30