private function addBulkCreateRecord($record, $objectType)
    {
        if (isset($this->bulkCreateRecords[$objectType])
            && count($this->bulkCreateRecords[$objectType]) == $this->bulkSaveLimit) {
            $this->flushCreates($objectType);
        }

        $this->bulkCreateRecords[$objectType][] = $record;
    }