ImmutablePropertiesConstraint.php

<?php

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

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

/**
 * Checks if config entity properties have been changed.
 */
class ImmutablePropertiesConstraint extends SymfonyConstraint {
  public function __construct(public array $properties, public string $message = "The '@name' property cannot be changed.", ?array $groups = NULL, mixed $payload = NULL) {
    parent::__construct(groups: $groups, payload: $payload);
  }

}