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- <?php
- namespace Drupal\Core\Entity\Plugin\Validation\Constraint;
- use Symfony\Component\Validator\Constraint;
- /**
- * Provides a base class for constraints validating multiple fields.
- *
- * The constraint must be defined on entity-level; i.e., added to the entity
- * type.
- *
- * @see \Drupal\Core\Entity\EntityType::addConstraint
- */
- abstract class CompositeConstraintBase extends Constraint {
- /**
- * An array of entity fields which should be passed to the validator.
- *
- * @return string[]
- * An array of field names.
- */
- abstract public function coversFields();
- }
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