code: func (c *Certificates) isEmpty() bool {
  	if len(*c) == 0 {
  		return true
  	}
  	var key int
  	for _, cert := range *c {
  		if len(cert.CertFile.String()) != 0 && len(cert.KeyFile.String()) != 0 {
  			break
  		}
  		key++
  	}
  	return key == len(*c)
  }
docs: // isEmpty checks if the certificates list is empty