code: public function getCachePool($name)
      {
          if (array_key_exists($name, $this->cachePools)) {
              return $this->cachePools[$name];
          }
  
          throw new KeyNotFoundInSetException($name, array_keys($this->cachePools), 'cache pools');
      }
docs: Returns a cache pool.
  
  @param string $name Cache pool name
  
  @throws KeyNotFoundInSetException
  
  @return CacheItemPoolInterface