code: func (ns *Namespace) SHA256(in interface{}) (string, error) {
  	conv, err := cast.ToStringE(in)
  	if err != nil {
  		return "", err
  	}
  
  	hash := sha256.Sum256([]byte(conv))
  	return hex.EncodeToString(hash[:]), nil
  }
docs: // SHA256 hashes the given input and returns its SHA256 checksum.