code: public static Tracker parseTracker(JSONObject object) throws JSONException {
  		final int id = JsonInput.getInt(object, "id");
  		final String name = JsonInput.getStringNotNull(object, "name");
  		return new Tracker(id, name);
  	}
docs: Parses a tracker.
  
  @param object
  object to parse.
  @return parsed tracker.
  @throws RedmineFormatException
  if object is not a valid tracker.