public void makeInvisible(long testimonial_id)
        {
            try
            {
                _transactionManager.beginTransaction();
                var testimonial = _testimonialRepo.getById(testimonial_id);

                if (testimonial == null)
                {
                    throw new ItemNotFoundException($"Testimonial with id {testimonial_id} doesnot exist.");
                }
                testimonial.makeInvisible();
                _testimonialRepo.update(testimonial);
                _transactionManager.commitTransaction();
            }
            catch (Exception)
            {
                _transactionManager.rollbackTransaction();
                throw;
            }
        }