code: func NewDesignateProvider(domainFilter DomainFilter, dryRun bool) (Provider, error) {
  	client, err := newDesignateClient()
  	if err != nil {
  		return nil, err
  	}
  	return &designateProvider{
  		client:       client,
  		domainFilter: domainFilter,
  		dryRun:       dryRun,
  	}, nil
  }
docs: // NewDesignateProvider is a factory function for OpenStack designate providers