original_string: public function close(int $fd = null)
      {
          return App::make(Server::class)->close($fd ?: $this->sender);
      }
code: public function close(int $fd = null)
      {
          return App::make(Server::class)->close($fd ?: $this->sender);
      }
code_tokens: public function close ( int $ fd = null ) { return App :: make ( Server :: class ) -> close ( $ fd ? : $ this -> sender ) ; }
docstring: Close current connection.
  
  @param integer
  
  @return boolean
docstring_tokens: Close current connection .