RoleExistsConstraint.php

<?php

declare (strict_types=1);
namespace Drupal\user\Plugin\Validation\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Validation\Attribute\Constraint;
use Symfony\Component\Validator\Attribute\HasNamedArguments;
use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**
 * Checks if a role exists.
 */
class RoleExistsConstraint extends SymfonyConstraint {
  public function __construct(mixed $options = NULL, public $message = "The role with id '@rid' does not exist.", ?array $groups = NULL, mixed $payload = NULL) {
    parent::__construct($options, $groups, $payload);
  }

}