func listSinks(client *logadmin.Client) ([]string, error) {
	// [START list_log_sinks]
	ctx := context.Background()

	var sinks []string
	it := client.Sinks(ctx)
	for {
		sink, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return nil, err
		}
		sinks = append(sinks, sink.ID)
	}
	// [END list_log_sinks]
	return sinks, nil
}