framework/caching/MemCache.php
protected function getValues($keys)
    {
        return $this->useMemcached ? $this->_cache->getMulti($keys) : $this->_cache->get($keys);
    }
protected function getValues($keys)
    {
        return $this->useMemcached ? $this->_cache->getMulti($keys) : $this->_cache->get($keys);
    }
Retrieves multiple values from cache with the specified keys.
@param array $keys a list of keys identifying the cached values
@return array a list of cached values indexed by the keys