You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: timesaver.go
    path of file: ./repos/google-cloud-go/internal/godocfx
    
    the code of the file until where you have to start completion: // Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "Lice
    
func (ts *dsTimeSaver) get(ctx context.Context) (time.Time, error) {
	if ts.client == nil {
		var err error
		ts.client, err = datastore.NewClient(ctx, ts.projectID)
		if err != nil {
			return time.Time{}, err
		}
		ts.k = datastore.NameKey("godocfx-index", "latest", nil)
	}
	prevLatest := indexTimestamp{}
	if err := ts.client.Get(ctx, ts.k, &prevLatest); err != nil {
		if err != datastore.ErrNoSuchEntity {
			return time.Time{}, fmt.Errorf("Get: %v", err)
		}
		// Default to 10 days ago.
		prevLatest.T = time.Now().Add(-10 * 24 * time.Hour).UTC()
		log.Println("Default to", prevLatest.T)
	}
	return prevLatest.T.UTC(), nil
}