code: func TransformExcC14n(el *etree.Element, inclusiveNamespacesPrefixList string) error {
  	prefixes := strings.Fields(inclusiveNamespacesPrefixList)
  	prefixSet := make(map[string]struct{}, len(prefixes))
  
  	for _, prefix := range prefixes {
  		prefixSet[prefix] = struct{}{}
  	}
  
  	err := transformExcC14n(DefaultNSContext, DefaultNSContext, el, prefixSet)
  	if err != nil {
  		return err
  	}
  
  	return nil
  }
docs: // TransformExcC14n transforms the passed element into xml-exc-c14n form.