public function storeRecordSet(RecordSet $set, $key, $lifetime = null)
{
$class = $set->getClassName();
$fullKey = $this->_buildSetKey($class, $key);
$ids = [];
foreach ($set as $item) {
$ids[] = $item->id;
$this->storeRecord($item, $lifetime);
}
$this->_cacher->writeData($fullKey, $ids, $lifetime);
}
