code: func (s *RepositoriesService) ListReleaseAssets(ctx context.Context, owner, repo string, id int64, opt *ListOptions) ([]*ReleaseAsset, *Response, error) {
  	u := fmt.Sprintf("repos/%s/%s/releases/%d/assets", owner, repo, id)
  	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
  	}
  
  	var assets []*ReleaseAsset
  	resp, err := s.client.Do(ctx, req, &assets)
  	if err != nil {
  		return nil, resp, err
  	}
  	return assets, resp, nil
  }
docs: // ListReleaseAssets lists the release's assets.
  //
  // GitHub API docs: https://developer.github.com/v3/repos/releases/#list-assets-for-a-release