return null; }
	public static RoomClassification findRoomClassificationByCode(			final Collection<RoomClassification> roomClassifications,			final RoomClassification parentRoomClassification, final Integer code) {		for (final RoomClassification roomClassification : roomClassifications) {			if (roomClassification.getParentRoomClassification() == parentRoomClassification					&& code.equals(roomClassification.getCode())) {				return roomClassification;			}		}		return null;	}