public function close(int $fd = null)
    {
        return App::make(Server::class)->close($fd ?: $this->sender);
    }
public function close(int $fd = null)
    {
        return App::make(Server::class)->close($fd ?: $this->sender);
    }
public function close ( int $ fd = null ) { return App :: make ( Server :: class ) -> close ( $ fd ? : $ this -> sender ) ; }
Close current connection.

@param integer

@return boolean
Close current connection .