public SolutionRunner(ILog log, AppSettings settings, PortReservations reservations, Shell shell)
 {
     _log = log;
     _settings = settings;
     _reservations = reservations;
     _shell = shell;
 }
 public PortAssignment(int number, PortReservations reservations)
 {
     _number = number;
     _reservations = reservations;
 }