+ $pool->detach($req);
+ $pool->attach($req);
+ $pool->detach($req);
+ $pool->attach($req);
+ $pool->detach($req);
+ $pool->attach($req);
+ $req->getResponseMessage()->getResponseCode();
+ $req->getResponseMessage()->getResponseCode();
+ $req->getResponseMessage()->getResponseCode();
+ $req->getResponseMessage()->getResponseCode();