EntityReferenceSupportedNewEntitiesConstraint.php

<?php

namespace Drupal\workspaces\Plugin\Validation\Constraint;

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

/**
 * The entity reference supported new entities constraint.
 */
class EntityReferenceSupportedNewEntitiesConstraint extends SymfonyConstraint {
    
    /**
     * The default violation message.
     *
     * @var string
     */
    public $message = '%collection_label can only be created in the default workspace.';

}