UnchangingCacheableDependencyTrait.php

<?php

namespace Drupal\Core\Cache;


/**
 * Trait to implement CacheableDependencyInterface for unchanging objects.
 *
 * @see \Drupal\Core\Cache\CacheableDependencyInterface
 */
trait UnchangingCacheableDependencyTrait {
    
    /**
     * {@inheritdoc}
     */
    public function getCacheContexts() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheTags() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheMaxAge() {
        return Cache::PERMANENT;
    }

}