/**
  * Validate an operation
  *
  * @param OperationInterface $operation
  *
  * @return bool
  */
 public function isOperationValid(OperationInterface $operation)
 {
     try {
         if ($this->operationManager->findByMiraklIdAndPaymentVoucherNumber($operation->getMiraklId(), $operation->getPaymentVoucher())) {
             throw new AlreadyCreatedOperationException($operation);
         }
         if (!$this->operationManager->isValid($operation)) {
             throw new InvalidOperationException($operation);
         }
         ModelValidator::validate($operation);
     } catch (Exception $e) {
         $this->handleException($e);
         return false;
     }
     return true;
 }