public function handle(UpdateCouponCommand $command)
 {
     $couponDTO = $command->getCouponDTO();
     $coupon = $this->couponService->findOneById($couponDTO->id);
     CouponDTOBuilder::setFromDTO($coupon, $couponDTO);
     $this->couponService->update($coupon);
 }
 public function getCouponDTO()
 {
     return $this->couponDTOBuilder->build();
 }