code: func (remote *RemoteDebugger) SetDownloadBehavior(behavior DownloadBehavior, downloadPath string) error {
  	params := Params{"behavior": behavior}
  	if len(downloadPath) > 0 {
  		params["downloadPath"] = downloadPath
  	}
  
  	_, err := remote.SendRequest("Page.setDownloadBehavior", params)
  	return err
  }
docs: // SetDownloadBehaviour enable/disable downloads.