AllowedValuesConstraint.php

<?php

namespace Drupal\Core\Validation\Plugin\Validation\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Validation\Attribute\Constraint;
use Symfony\Component\Validator\Constraints\Choice;

/**
 * Checks for the value being allowed.
 *
 * @see \Drupal\Core\TypedData\OptionsProviderInterface
 */
class AllowedValuesConstraint extends Choice {
    
    /**
     * {@inheritdoc}
     */
    public function __construct(...$args) {
        $this->strict = TRUE;
        $this->minMessage = 'You must select at least %limit choice.|You must select at least %limit choices.';
        $this->maxMessage = 'You must select at most %limit choice.|You must select at most %limit choices.';
        parent::__construct(...$args);
    }

}