/**
  * @param ExecutionContextInterface $context
  *
  * @Assert\Callback
  */
 public function validatePeriods(ExecutionContextInterface $context)
 {
     if ($this->jobNursery->isSerial() !== $this->isSerialType()) {
         $context->buildViolation('job_nursery.period_serial')->atPath('type')->addViolation();
     }
 }