ContentTranslationSynchronizedFieldsConstraint.php

<?php

namespace Drupal\content_translation\Plugin\Validation\Constraint;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Validation\Attribute\Constraint;
use Symfony\Component\Validator\Constraint as SymfonyConstraint;

/**
 * Validation constraint for the entity changed timestamp.
 *
 * @internal
 */
class ContentTranslationSynchronizedFieldsConstraint extends SymfonyConstraint {
    
    /**
     * Message shown for non-translatable field changes in non-default revision.
     *
     * In this case "elements" refers to "field properties". It is what we are
     * using in the UI elsewhere.
     */
    public $defaultRevisionMessage = 'Non-translatable field elements can only be changed when updating the current revision.';
    
    /**
     * Message shown for non-translatable field changes in different language.
     *
     * In this case "elements" refers to "field properties". It is what we are
     * using in the UI elsewhere.
     */
    public $defaultTranslationMessage = 'Non-translatable field elements can only be changed when updating the original language.';

}