code: public function setCache($cache)
      {
          if (is_string($cache)) {
              $this->originalCache = $cache;
              $this->cache = new Twig_Cache_Filesystem($cache);
          } elseif (false === $cache) {
              $this->originalCache = $cache;
              $this->cache = new Twig_Cache_Null();
          } elseif (null === $cache) {
              @trigger_error('Using "null" as the cache strategy is deprecated since version 1.23 and will be removed in Twig 2.0.', E_USER_DEPRECATED);
              $this->originalCache = false;
              $this->cache = new Twig_Cache_Null();
          } elseif ($cache instanceof Twig_CacheInterface) {
              $this->originalCache = $this->cache = $cache;
          } else {
              throw new LogicException(sprintf('Cache can only be a string, false, or a Twig_CacheInterface implementation.'));
          }
      }
docs: Sets the current cache implementation.
  
  @param Twig_CacheInterface|string|false $cache A Twig_CacheInterface implementation,
  an absolute path to the compiled templates,
  or false to disable cache