How to set cell alignment using Excel Buffer from Nav2013?

radek.bb

New Excel Buffer is using CellDecorator class to set font, fill and borders.
But where cell alignment fit here?
The closest one would be the font - but I don't think it is part of this class.

In the list of classes there is DocumentFormat.OpenXml.Spreadsheet.Alignment but I am not sure how I can use it with Microsoft.Dynamics.Nav.OpenXml.Spreadsheet.WorksheetWriter which is how table 370 is updating spreadsheet.

I am guessing that WorksheetWriter's property Worksheet could offer some way - but once again - starting from class DocumentFormat.OpenXml.Spreadsheet.Worksheet there is no obvious connection to Alignment class.

Any suggestions?