public static function getApi($api_key = NULL) { if (empty($api_key)) { $api_key = Config::g('onenet_masterkey'); } if (!is_object(self::$_apis[$api_key])) { $master_key = Config::g('onenet_masterkey'); self::$_apis[$api_key] = new OneNetApi($api_key, Config::g('RESTfulUrl')); } return self::$_apis[$api_key]; }