/**
  * set achievement progress of a given achievement
  *
  * @param achievement - name of achievement to be set
  * @param progress - progress to set the achievement progress to
  */
 public void setAchievementProgress(String achievement, double progress) {
   for (AchievementIcon ai : achievementWindow.iconList) {
     if (ai.getName().equals(achievement)) {
       ai.setProgress(progress);
     }
   }
 }
  @SuppressWarnings("unchecked")
  public static void writeToFile(Writer writer) {
    for (AchievementIcon ai : iconList) {
      JSONObject obj = new JSONObject();
      obj.put("name", ai.getName());
      obj.put("progress", ai.getProgress());

      try {
        writer.write(obj.toString() + "\n");
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }