IntelliSense method auto-completion not working for some methods

I’ve go a question/feedback regarding auto-completion.

We have dounf out that some metods from UiPath.Excel does not auto-complete correctly. I suppose there is many more of them.
The two we found are:

UiPath.Excel.Helpers.ExcelUtilities.ConvertColumnLetterToColumnIndex
UiPath.Excel.Helpers.ExcelUtilities.ConvertColumnIndexToColumnLetter

The autocompletion stops when you want to access Helpers

Is it done like that on purpose so noone accesses those mthods?
Or maybe those features are still being tested since the autocompletion does not work?

Those are actually really cool features which we have already implemented as separate library but it would be much easier to use them as they are part of the prebuild activities provided by UiPath.