public String report(String indent) {
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append(indent).append(name).append(" ").append(getAreaSize() - getFreeAreaSize())
                .append("/").append(getAreaSize()).append("\n");
        for (ParkingService parkingService : parkingServices) {
            stringBuilder.append(parkingService.report(indent + "  "));
        }
        return stringBuilder.toString();
    }