code: private function addViolation($value, Constraint $constraint)
      {
          /** @var \Misd\PhoneNumberBundle\Validator\Constraints\PhoneNumber $constraint */
          if ($this->context instanceof ExecutionContextInterface) {
              $this->context->buildViolation($constraint->getMessage())
                  ->setParameter('{{ type }}', $constraint->getType())
                  ->setParameter('{{ value }}', $this->formatValue($value))
                  ->setCode(PhoneNumber::INVALID_PHONE_NUMBER_ERROR)
                  ->addViolation();
          } else {
              $this->context->addViolation($constraint->getMessage(), array(
                  '{{ type }}' => $constraint->getType(),
                  '{{ value }}' => $value
              ));
          }
      }
docs: Add a violation.
  
  @param mixed      $value      The value that should be validated.
  @param Constraint $constraint The constraint for the validation.