public void Show()
    {
        HelperLog.Refresh();

        try {
            if (HelperLog.Data == null)
            {
                return;                 //do nothing
            }
            _GetOrInitializeTextComponent().text = string.Join("\n", HelperLog.Data.GetReachableCountStrings());
            _GetOrInitializeTextObj().SetActive(true);
        } catch (Exception e) {
            DebugLog.Warn($"Show failed: {e}");
        }
    }