public PredictPacman(Node node, Direction direction, PredictPacman pacman)
     : base(node, direction)
 {
     if (pacman != null)
     {
         Danger = pacman.Danger;
     }
 }
 public PredictPacman(Node node, Direction direction, PredictPacman pacman)
     : base(node, direction)
 {
     if (pacman != null)
     {
         Danger = pacman.Danger;
         if (Danger < dangerSaveLimit)
         {
             DangerLimitIteration++;
         }
     }
 }