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

    public function get($key, &$token = null)
    {
        $value = $this->local->get($key, $token);
        // short-circuit reading from real cache if we have an uncommitted flush
        if ($this->suspend && $token === null) {
            // flush hasn't been committed yet, don't read from real cache!
            return false;
        }
        if ($value === false) {
            if ($this->local->expired($key)) {
                /*
                 * Item used to exist in local cache, but is now expired. This
                 * is used when values are to be deleted: we don't want to reach
                 * out to real storage because that would respond with the not-
                 * yet-deleted value.
                 */
                return false;
            }
            // unknown in local cache = fetch from source cache
            $value = $this->cache->get($key, $token);
        }
        // no value = quit early, don't generate a useless token
        if ($value === false) {
            return false;
        }
        /*
         * $token will be unreliable to the deferred updates so generate
         * a custom one and keep the associated value around.
         * Read more details in PHPDoc for function cas().
         * uniqid is ok here. Doesn't really have to be unique across
         * servers, just has to be unique every time it's called in this
         * one particular request - which it is.
         */
        $token = uniqid();
        $this->tokens[$token] = serialize($value);
        return $value;
    }

 /**
  * In addition to all writes being stored to $local, we'll also
  * keep get() values around ;).
  *
  * {@inheritdoc}
  */
 public function get($key, &$token = null)
 {
     $value = $this->transaction->get($key, $token);
     // only store if we managed to retrieve a value (valid token) and it's
     // not already in cache (or we may mess up tokens)
     if ($value !== false && $this->local->get($key, $localToken) === false && $localToken === null) {
         $this->local->set($key, $value);
     }
     return $value;
 }