Doctrine\Common\Cache\CacheProvider::contains PHP Метод

    public function contains($id)
    {
        return $this->doContains($this->getNamespacedId($id));
    }

 /**
  * @param string $key
  * @return mixed|null
  */
 public function get($key)
 {
     if (!$this->cache->contains($key)) {
         $this->loadSettings();
     }
     return $this->cache->fetch($key);
 }