code: func TimestampAgo(ts *gogotypes.Timestamp) string {
  	if ts == nil {
  		return ""
  	}
  	t, err := gogotypes.TimestampFromProto(ts)
  	if err != nil {
  		panic(err)
  	}
  	return humanize.Time(t)
  }
docs: // TimestampAgo returns a relative time string from a timestamp (e.g. "12 seconds ago").