code: func DefaultSettings(c context.Context) Settings {
  	// Disable local cache on devserver by default to allows changes to local
  	// configs to propagate instantly. This is usually preferred when developing
  	// locally.
  	exp := 0
  	if !info.IsDevAppServer(c) {
  		exp = int(DefaultExpire.Seconds())
  	}
  	return Settings{
  		CacheExpirationSec:  exp,
  		DatastoreCacheMode:  DSCacheDisabled,
  		AdministratorsGroup: configServiceAdmins,
  	}
  }
docs: // DefaultSettings returns Settings to use if setting store is empty.