* call ILoadBalancer::reuseConnection() on the handle when finished using it.
* In all other cases, this is not necessary, though not harmful either.
*
- * @param int $i Server index or DB_MASTER/DB_REPLICA
+ * @param int $i Server index (overrides $groups) or DB_MASTER/DB_REPLICA
* @param array|string|bool $groups Query group(s), or false for the generic reader
* @param string|bool $domain Domain ID, or false for the current domain
* @param int $flags Bitfield of CONN_* class constants