TestItemWithDependencies.php

<?php

namespace Drupal\field_test\Plugin\Field\FieldType;

use Drupal\Core\Field\Attribute\FieldType;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Defines the 'test_field_with_dependencies' entity field item.
 */
class TestItemWithDependencies extends TestItem {
    
    /**
     * {@inheritdoc}
     */
    public static function calculateDependencies(FieldDefinitionInterface $field_definition) {
        return [
            'content' => [
                'node:article:uuid',
            ],
        ];
    }

}