toggle cocoa App dockless on or off

toggleDock.swift

func toggleDock(show: Bool) -> Bool {
  // ProcessApplicationTransformState
  let transformState = show ? 
  // show to foreground application 
  // or not show to background application
  ProcessApplicationTransformState(kProcessTransformToForegroundApplication) 
 : ProcessApplicationTransformState(kProcessTransformToUIElementApplication)
  // transform current application type.
 var psn = ProcessSerialNumber(highLongOfPSN: 0, lowLongOfPSN: UInt32(kCurrentProcess))
 return TransformProcessType(&psn, transformState) == 0
}