code: func (s *ActivityService) ListStargazers(ctx context.Context, owner, repo string, opt *ListOptions) ([]*Stargazer, *Response, error) {
  	u := fmt.Sprintf("repos/%s/%s/stargazers", owner, repo)
  	u, err := addOptions(u, opt)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	// TODO: remove custom Accept header when this API fully launches
  	req.Header.Set("Accept", mediaTypeStarringPreview)
  
  	var stargazers []*Stargazer
  	resp, err := s.client.Do(ctx, req, &stargazers)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return stargazers, resp, nil
  }
docs: // ListStargazers lists people who have starred the specified repo.
  //
  // GitHub API docs: https://developer.github.com/v3/activity/starring/#list-stargazers