code: func FromConfig(c context.Context, cfg []*config.Settings_SourceAcls) (*ACLs, error) {
  	ctx := validation.Context{Context: c}
  	ACLs := &ACLs{}
  	ACLs.load(&ctx, cfg)
  	if err := ctx.Finalize(); err != nil {
  		return nil, err
  	}
  	return ACLs, nil
  }
docs: // FromConfig returns ACLs if config is valid.