MatthiasMullie\Scrapbook\Psr6\Pool::commit PHP Method

    public function commit()
    {
        $deferred = array();
        foreach ($this->deferred as $key => $item) {
            if ($item->isExpired()) {
                // already expired: don't even save it
                continue;
            }
            // setMulti doesn't allow to set expiration times on a per-item basis,
            // so we'll have to group our requests per expiration date
            $expire = $item->getExpiration();
            $deferred[$expire][$item->getKey()] = $item->get();
        }
        // setMulti doesn't allow to set expiration times on a per-item basis,
        // so we'll have to group our requests per expiration date
        $success = true;
        foreach ($deferred as $expire => $items) {
            $status = $this->store->setMulti($items, $expire);
            $success &= !in_array(false, $status);
            unset($deferred[$expire]);
        }
        return (bool) $success;
    }