## Params:
-* callable $run as function(http\Client $c, resource $s = null, int $action = http\Client\Curl\User::POLL_NONE) : int
+* callable $run as function(http\Client $c, resource $s = null, int $action = http\Client\Curl\User::POLL_NONE) : int
Internal callback returning the number of unfinished requests pending.
-> ***NOTE***:
+> ***NOTE***:
> The callback should be run when a timeout occurs or a watched socket needs action.