code: func (remote *RemoteDebugger) GetResponseBody(req string) ([]byte, error) {
  	res, err := remote.SendRequest("Network.getResponseBody", Params{
  		"requestId": req,
  	})
  
  	if err != nil {
  		return nil, err
  	}
  
  	body := res["body"]
  	if body == nil {
  		return nil, nil
  	}
  
  	if b, ok := res["base64Encoded"]; ok && b.(bool) {
  		return base64.StdEncoding.DecodeString(body.(string))
  	} else {
  		return []byte(body.(string)), nil
  	}
  }
docs: // GetResponseBody returns the response body of a given requestId (from the Network.responseReceived payload).