3 namespace Drupal\aggregator\Plugin\Validation\Constraint;
5 use Drupal\Core\Validation\Plugin\Validation\Constraint\UniqueFieldConstraint;
8 * Supports validating feed titles.
12 * label = @Translation("Feed title", context = "Validation")
15 class FeedTitleConstraint extends UniqueFieldConstraint {
17 public $message = 'A feed named %value already exists. Enter a unique title.';