What is completionHandler?

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Tags

  1. #escaping
  2. #completionhandler
  3. #handler
  4. #whatever
  5. #arguments
  6. #function
  7. #optionally
  8. #takes
  9. #calling
  10. #urlresponse
  11. #urlrequest
  12. #error
  13. #point
  14. #completion
  15. #request