MatthiasMullie\Scrapbook\Buffered\Utils\Transaction::getMulti PHP Method

    public function getMulti(array $keys, array &$tokens = null)
    {
        // retrieve all that we can from local cache
        $values = $this->local->getMulti($keys);
        $tokens = array();
        // short-circuit reading from real cache if we have an uncommitted flush
        if (!$this->suspend) {
            // figure out which missing key we need to get from real cache
            $keys = array_diff($keys, array_keys($values));
            foreach ($keys as $i => $key) {
                // don't reach out to real cache for keys that are about to be gone
                if ($this->local->expired($key)) {
                    unset($keys[$i]);
                }
            }
            // fetch missing values from real cache
            if ($keys) {
                $missing = $this->cache->getMulti($keys);
                $values += $missing;
            }
        }
        // any tokens we get will be unreliable, so generate some replacements
        // (more elaborate explanation in get())
        foreach ($values as $key => $value) {
            $token = uniqid();
            $tokens[$key] = $token;
            $this->tokens[$token] = serialize($value);
        }
        return $values;
    }

 /**
  * In addition to all writes being stored to $local, we'll also
  * keep get() values around ;).
  *
  * {@inheritdoc}
  */
 public function getMulti(array $keys, array &$tokens = null)
 {
     $values = $this->transaction->getMulti($keys, $tokens);
     $missing = array_diff_key($values, $this->local->getMulti($keys));
     if (!empty($missing)) {
         $this->local->setMulti($missing);
     }
     return $values;
 }