static function create($host = null, $port = null, $scrapername = null, $runid = null, $attachables = null, $verification_key = null)
{
if (is_null(self::$m_ds)) {
self::$m_ds = new SW_DataStoreClass($host, $port, $scrapername, $runid, $attachables, $verification_key);
}
return self::$m_ds;
}
