public function setPermissionNames($any, $none, $user, $anon)
    {
        if ($any) {
            $this->any = $any;
        }
        if ($none) {
            $this->none = $none;
        }
        if ($user) {
            $this->user = $user;
        }
        if ($anon) {
            $this->anon = $anon;
        }
    }