code: func (f EventFields) AsString() string {
  	return fmt.Sprintf("%s: login=%s, id=%v, bytes=%v",
  		f.GetString(EventType),
  		f.GetString(EventLogin),
  		f.GetInt(EventCursor),
  		f.GetInt(SessionPrintEventBytes))
  }
docs: // String returns a string representation of an event structure