code: func (cli *Client) ContainerStats(ctx context.Context, containerID string, stream bool) (types.ContainerStats, error) {
  	query := url.Values{}
  	query.Set("stream", "0")
  	if stream {
  		query.Set("stream", "1")
  	}
  
  	resp, err := cli.get(ctx, "/containers/"+containerID+"/stats", query, nil)
  	if err != nil {
  		return types.ContainerStats{}, err
  	}
  
  	osType := getDockerOS(resp.header.Get("Server"))
  	return types.ContainerStats{Body: resp.body, OSType: osType}, err
  }
docs: // ContainerStats returns near realtime stats for a given container.
  // It's up to the caller to close the io.ReadCloser returned.