public AirportController(IAirportControllerHandler airportControllerHandler)
 {
     if (!airportControllerHandler.IsNullOrDefault())
     {
         m_AirportControllerHandler = airportControllerHandler;    
     }
 }
 /// <summary>
 /// Initializes this instance.
 /// </summary>
 private void Init()
 {
     m_AirportControllerHandlerMock = Substitute.For<IAirportControllerHandler>();
 }