code: func MakeDefaultRuleTemplate(defaultRule string, funcMap template.FuncMap) (*template.Template, error) {
  	defaultFuncMap := sprig.TxtFuncMap()
  	defaultFuncMap["normalize"] = Normalize
  
  	for k, fn := range funcMap {
  		defaultFuncMap[k] = fn
  	}
  
  	return template.New("defaultRule").Funcs(defaultFuncMap).Parse(defaultRule)
  }
docs: // MakeDefaultRuleTemplate Creates the default rule template.