<?= "<?php\n" ?> namespace <?= $namespace; ?>; use Symfony\Component\Validator\Constraint; use Symfony\Component\Validator\ConstraintValidator; class <?= $class_name ?> extends ConstraintValidator { public function validate($value, Constraint $constraint) { /* @var <?= $constraint_class_name ?> $constraint */ if (null === $value || '' === $value) { return; } // TODO: implement the validation here $this->context->buildViolation($constraint->message) ->setParameter('{{ value }}', $value) ->addViolation(); } }