Swift allows override public method with private one

gistfile1.swift

//Original file
  class GiftCardPaymentViewController{
    public func nextStep() {
      [...]
    }
  }
// Some testcase    
  class GiftCardPaymentTest:XCTestCase {
    func testIt() {
    
        class MockedGiftCardPaymentViewController:GiftCardPaymentViewController {
            var nextStepExecutedCount = 0
            // SO FUCKING APPLE ALLOWES YOU TO SAY HERE PRIVATE... Even suggest it. If you do public you get:
            // https://www.dropbox.com/s/7lbj0868dvctmia/Screenshot%202015-02-26%2017.55.47.png?dl=0
            private override func nextStep() {
                nextStepExecutedCount++;
                super.nextStep()
            }
        }
        
    }
  }