code: func (p *Signing) SetRemoteCAsFromFile(caFile string) error {
  	if caFile != "" {
  		remoteCAs, err := helpers.LoadPEMCertPool(caFile)
  		if err != nil {
  			return err
  		}
  		p.SetRemoteCAs(remoteCAs)
  	}
  	return nil
  }
docs: // SetRemoteCAsFromFile reads root CAs from file and updates the properties to set remote CAs for TLS
  // remote requests