code: func (m *Message) Render(tmpl *template.Template) ([]byte, error) {
  	buf := new(bytes.Buffer)
  	err := tmpl.Execute(buf, m)
  	if err != nil {
  		return nil, err
  	}
  	return buf.Bytes(), nil
  }
docs: // Render transforms the log message using the Syslog template