code: func (remote *RemoteDebugger) Protocol() (map[string]interface{}, error) {
  	resp, err := responseError(remote.http.Get("/json/protocol", nil, nil))
  	if err != nil {
  		return nil, err
  	}
  
  	var proto map[string]interface{}
  	if err = decode(resp, &proto); err != nil {
  		return nil, err
  	}
  
  	return proto, nil
  }
docs: // Protocol returns the DevTools protocol specification