VocabularyResponse.php

<?php

namespace Drupal\vocabulary_serialization_test;

use Drupal\Core\Cache\CacheableResponse;
use Drupal\taxonomy\VocabularyInterface;
class VocabularyResponse extends CacheableResponse {
    
    /**
     * @var \Drupal\taxonomy\VocabularyInterface
     */
    protected $vocabulary;
    public function setVocabulary(VocabularyInterface $vocabulary) {
        $this->vocabulary = $vocabulary;
    }

}