pattern_library-8.x-2.x-dev/src/Plugin/Validation/Constraint/ValidPatternLibraryModifier.php

<?php

namespace Drupal\pattern_library\Plugin\Validation\Constraint;

use Drupal\Core\Annotation\Translation;
use Symfony\Component\Validator\Constraint;

/**
 * Define the valid pattern library modifier constraint.
 *
 * @Constraint(
 *   id = "ValidPatternLibraryModifier",
 *   label = @Translation("Validate pattern library region", context = "Validation"),
 *   type = "pattern_library"
 * )
 */
class ValidPatternLibraryModifier extends Constraint {

  public $modifierPropertyRequired = 'The %region modifier %property is required!';
}