 
     func connectLetterPair(letterPair: (Letter, Letter), plugboardView: PlugboardView)
     {
-        enigmaMachine.plugInPair(pair: letterPair)
+        enigmaMachine.plugIn(pair: letterPair)
     }
 
     func connectionForLetter(letter: Letter, plugboardView: PlugboardView) -> Letter?

        enigmaMachine.keyDown(aLetter: aLetter)
        if let outputLetter = enigmaMachine.litLamp
        {
            printerController.displayLetter(letter: outputLetter)
        }
    }


                {
                    rotorBoxDataSource.insertRotor(newRotor: removedRotor)
                }
                enigmaMachine.insert(rotor: rotorBeingDragged, inSlot: ringIndex, position: Letter.A)
                self.rotorBeingDragged = nil
            }
            ret = true
