@Override
 public int forbidden(ProductType productType) {
   return productTypeMapper.forbiddenByPrimaryKey(productType.getId());
 }
 @Override
 public ProductType searchByPrimaryKey(ProductType productType) {
   return productTypeMapper.selectByPrimaryKey(productType.getId());
 }
 @Override
 public int delete(ProductType productType) {
   return productTypeMapper.deleteByPrimaryKey(productType.getId());
 }