public function delete(PlanInterface $plan)
 {
     $plan->setIsActive(false);
     $this->om->persist($plan);
     $this->om->flush();
     return true;
 }
 /**
  * @param Avro\StripeBundle\Model\PlanInterface
  */
 public function delete(PlanInterface $plan)
 {
     $stripe_plan = $this->retrieve($plan->getId());
     if ($stripe_plan) {
         $stripe_plan->delete();
     }
     return true;
 }