class CategoryFeignController implements CategoryFeignClient {

    @Autowired
    private CategoryService categoryService;

    @Override
    public ServerResponseEntity<List<CategoryVO>> listByOneLevel() {
        return ServerResponseEntity.success(categoryService.listByShopIdAndParenId(Constant.PLATFORM_SHOP_ID, Constant.CATEGORY_ID));
    }

    @Override
    public ServerResponseEntity<List<Long>> listCategoryId(Long categoryId) {<FILL_FUNCTION_BODY>}
}

        CategoryVO category = categoryService.getById(categoryId);
        List<Long> categoryIds = categoryService.listCategoryId(category.getShopId(), category.getParentId());
        return ServerResponseEntity.success(categoryIds);
    
<no_super_class>