public function write($uid, $mixed) {
        $this->alloc();
        $this->session->offsetSet($uid, $mixed);
        return true;
    }
public function write($uid, $mixed) {
        $this->alloc();
        $this->session->offsetSet($uid, $mixed);
        return true;
    }
Write datas on $uid key
@param mixed $uid
@param mixed $mixed