EntityTestCompositeConstraint.php

<?php

namespace Drupal\entity_test\Plugin\Validation\Constraint;

use Drupal\Core\Entity\Plugin\Validation\Constraint\CompositeConstraintBase;

/**
 * Constraint with multiple fields.
 *
 * @Constraint(
 *   id = "EntityTestComposite",
 *   label = @Translation("Constraint with multiple fields."),
 *   type = "entity"
 * )
 */
class EntityTestCompositeConstraint extends CompositeConstraintBase {
    public $message = 'Multiple fields are validated';
    
    /**
     * {@inheritdoc}
     */
    public function coversFields() {
        return [
            'name',
            'type',
        ];
    }

}